The Global Warming Potentials (GWP) of the Intergovernmental Panel on Climate Change (IPCC) in Table 2.14 of the Fourth Assessment Report (AR4) show the increase in warming by methane (CH4) and nitrous oxide (N2O) is 21 and 310 times respectively that of CO2. There has been wide acceptance of these values since publishing in 2007. Nevertheless, they are inaccurate.
This study uses accurate methods to calculate the impacts of CO2, CH4, and N2O on the warming of the atmosphere. For example, this quantitative analysis from reliable physics shows the contribution of CO2 to warming at Amsterdam is 0.0083°C out of a difference of 26°C. The warming effect of CH4 on the Earth’s atmosphere is 0.408% of that of CO2, and the warming by N2O is 0.085% of that of CO2.
Thus, the warming effects of CO2, CH4, and N2O are too small to measure. The invalidity of the methane and nitrous oxide values indicates the GWPs of the remaining approximately sixty chemicals in the Table 2.14 list are also invalid. A recommendation is that the IPCC consider revising or retracting the GWP values in Table 2.14.
Introduction
The purpose of this paper is to examine the Global Warming Potentials (GWPs) in Table 2.14 of the Fourth Assessment Report [1] of the Intergovernmental Panel on Climate Change (IPCC), Figure 1.The Global Warming Potentials (GWP) of methane and nitrous oxide calculated by the IPCC in Table2.14 have profoundly affected the decisions made by elected officials worldwide.
Nitrogen fertilizers have been restricted or banned in several countries because they emit a small amount of nitrous oxide. Nitrogen fertilizers are essential for the growth of plants, and nitrogen is often the limiting nutrient [2]. Restricting their use affects food production adversely and can cause food shortages. The IPCC claims that nitrous oxide has up to 310 times the warming effect of CO2. This value is so significant that we must determine whether or not this value of 310 is valid.
A similar situation occurs with methane, which is claimed to have 21 times the warming effect of CO2. Natural gas is virtually all methane transported widely by pipelines and pumping stations. The claim is that methane leaks from natural gas pipeline systems and processing are warming the Earth. Periodically, a scientist will quote Table 2.14 and raise the alarm about methane and the possibility of significant methane releases from the Arctic Tundra caused by the warming of the Earth [3].
The methodology of this study answers the question: “Of the temperature difference between two weather stations, how many degrees Celsius do CO2, CH4, and N2O contribute?”Four weather stations—Pond Inlet, Amsterdam, Colorado Springs, and Princeton, NJ—were selected to provide the answers. The temperature and relative humidity are recorded within the same.
Calculations for Table 2 Column D
In Row 5, the grams of CO2 per kilogram (kg) of dry air is (0.00041806 x 44 x (1000/29) = 0.630, where 44 and 29 are the molecular weights of CO2 and air, respectively. In Row 9, the grams of CH4 per kg of dry air are (0.000001927 x 16 x (1000/29)) = 0.001063, where 16 is the molecular weight of methane. Similarly, in Row 12, Column E, the grams of N2O per kg of dry air are (0.00000033675 x 44 x (1000/29) = 0.000511, where 44 is the molecular weight of nitrous oxide.There are 0.630/0.00106 = 594 grams of CO2 per gram of methane. Thus, there are (594 x 44)/16) = 1634 molecules of CO2 per methane molecule. Thus, because the molecular weights of CO2 and N2O are the same at 44, there are (0.630/0.000511) = 1235 molecules of CO2 for each molecule of N2O in the Earth’s atmosphere. Thus, in September 2023, CO2 molecules outnumber CH4 molecules by 1634 and N2O molecules by 1235.
Measuring the Contribution of CO2, CH4 and N2O to Temperature in the Earth’s Atmosphere
It is essential to understand that the measured and recorded temperature is the sum of all the factors affecting Earth’s temperature. These include warming caused by radiation from the Sun absorbed by CO2, CH4, N2O, feedback, and other warming or cooling effects. These factors also apply to temperature differences. The recorded temperature is input to the Humidair psychrometric program, which includes these factors in the heat content (enthalpy) and specific volume.
The following method quantifies the contribution of carbon dioxide, methane, and nitrous oxide to the difference in temperature between three weather stations and Pond Inlet.Table 3 is a summary of the Excel calculations. The file for the Excel calculations is: “Excel calculations for GWP Mar 102024.xlsx.” From the Excel spreadsheet, Column H, the temperatures measured at Pond Inlet, Amsterdam, Colorado Springs, and Princeton on December 30, 2023, were -18°C, 8°C, 3°C, and 4°C, respectively. We set the recorded level of CO2 at 418.06 at the location with the lowest of the four temperatures, i.e., at Pond Inlet. This is because the number of molecules of CO2 per cubic meter falls as the temperature rises.
The grams of CO2 per kg of dry air in the Pond Inlet row of Table 3 are the same as in Column D of Table 2. The temperature contributions of CO2, CH4, and N2O to the difference in temperature in °C between Pond Inlet and the weather stations in Column A are in Columns G, H, and I. The total is in Column J. The upper lines in the titles of the columns are the locations in the Excel spreadsheet calculations. Note that the average CO2 for Table 2 was 418.06 in August 2023, and the level of CO2 during the recording of the values for the Excel spreadsheet was 422.3 ppm. The difference of 4.24 ppm has no significant effect on the results of this study.
As shown in Table 4, the temperature increase caused by CH4 and N2O is a small percentage of the temperature rise caused by CO2.The warming effect of CO2 is too small to measure [9, 10].Thus, the warming effects of CH4 and N2O are also too small.The data in IPCC Table 2.14, showing that CH4 has 21 times the warming effect of CO2 and that N2O has 310 times the warming effect of CO2, are grossly incorrect.
Summary and Conclusions
This study provides evidence that the IPCC Global Warming Potentials are incorrect. It starts with the levels of carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) measured as molecules per million molecules of dry air, which is the molar fraction. Then, quantitative results from reliable physics establish the enthalpy and specific volume at four weather stations. Chemistry determines the grams of each gas per kg of dry air. The increase in the temperature bycurrent levels of methane (CH4) and nitrous (N2O) in the Earth’s atmosphere isa small percentage of that of CO2.Conclusions 6.1, 6.2, and 6.3 answer, “Of the temperature difference between two weather stations, how many degrees Celsius do CO2, CH4, and N2O contribute?”
6.1.In this study, the difference in temperature between Pond Inlet and Amsterdam is 26°C. The contribution of CO2 to this difference is 0.0083°C, but this amount is too small to measure.
6.2.The contribution of CH4 to the 26°C difference between Pond Inlet and Amsterdam is 0.0000338°C.This current level of methane in the atmosphere increases the temperature by 0.408% of that of CO2. It does not have 21 times the warming of CO2 as claimed by the IPCC.
6.3.N2O’s contribution to the 26°C difference between Pond Inlet and Amsterdam is 0.00000705oC. This is 0.085% of that of CO2. It does not have 310 times the warming of CO2, as claimed by the IPCC
6.4.The total contribution of all three gases to the 26°C difference between Pond Inlet and Amsterdam is 0.00833oC. This is a typical result; this difference is too small to measure.
6.5.The warming of the Earth’s atmosphere by CH4 and N2O is 0.408% and 0.085% respectively of that of CO2.
6.6.The warming by CH4 and N2O is so tiny in the Earth’s atmosphere that the IPCC estimates of warming by GWP over several years are irrelevant.
6.7.It is reasonable for the IPCC to consider revising or withdrawing Table 2.14 in the Fourth Assessment Report
Footnote:
If like me you are new to the term “psychrometrics”, it refers to an engineering method for assessing the thermodynamic properties of moist air. From Understanding The Psychrometric Chart
The psychrometric chart is a tool commonly used in the field of engineering to understand and analyze the properties of air. This chart provides valuable information about the thermodynamic properties of moist air, which is crucial for various applications such as heating, ventilation, and air conditioning (HVAC) systems. By understanding the psychrometric chart, engineers can make more informed decisions and optimize their designs for enhanced efficiency and comfort.
In addition to temperature, the psychrometric chart also includes other properties such as humidity ratio, enthalpy, and specific volume. The humidity ratio represents the mass of moisture present in the air per unit mass of dry air, while enthalpy is the total heat content of the air including both sensible and latent heat. Specific volume, on the other hand, is the volume occupied by a unit mass of air. Together, these properties provide a comprehensive understanding of the thermodynamic behavior of moist air.
John Bruyn writes at Quora answering the question: What does carbon dioxide have to do with climate change? He is a retired geophysicist with a background in exploration geology, geophysics, seismology, and in remote sensing by satellite. Excerpts in italics with my bolds and added images.
The surface of Mars shows that CO2 is transparent to radiation in the visible part of the electromagnetic spectrum until it becomes reflective as dry ice at temperatures below its -78.5 C (109.3 F) freezing point. A black body radiating at such temperatures does so at wavelengths close to 15 µm (microns), i.e., very low energy at the far end of the far infrared part of the electromagnetic spectrum.
Energy is a function of frequency and should therefore be plotted on the x-axis (top of this figure) and units of watts should not be included on the y-axis. The colored lines show the spectral radiance predicted by Planck’s law for black bodies with different absolute temperatures. The energy of radiation absorbed by carbon dioxide is near 0.08 electron volts while the UV-B energy that reaches Earth when the ozone layer is depleted is near 4 electron volts, 48 times larger.
Such radiation is inconsequential on Earth where the much higher global mean surface temperature of about 15 C (59 F) makes that impossible and irrelevant in that it would violate the 2nd law of thermodynamics. The exception would have to be mid-winter on central Antarctica where the temperatures can get as low as -90 C (-130 F) but where the roughly 0.042% (420 ppm) CO2 concentration leaves the partial pressure too low for dry ice to form. As that minimum temperature shows, any infrared radiation disappears quickly into space at close to the speed of light.
The extra carbon atom makes CO2 more massive than air and
at 0.042% that concentration is critically low for photosynthesis.
Any CO2 we can contribute only serves to improve on that. The reason for that very low concentration is the very much greater abundance of the lighter than air H2O molecules bonding with CO2 inversely proportional to temperature to suspend it temporarily. However, that is restricted to the troposphere with 99% of the Earth’s atmospheric H2O that relies on the bonding with enough CO2 molecules to be able to precipitate and fill water bodies on land and the ocean, currently taking up almost 71% of the global surface. Helping H2O precipitate makes CO2 a cooling agent, including by supporting photosynthesis and ozone formation in the stratosphere.
It follows that the atmospheric CO2 concentration is controlled by the amount of water vapour in the air and that its concentration rises and falls with the variations in insolation and from variations in the speed of the Earth’s rotation. Together they drive the evaporation of H2O from global surface, as well as the CO2 emissions from the ocean in the tropics. Cooling and the declining speed of the Earth’s rotation toward higher latitudes cause evaporation and the ocean’s CO2 emissions to decline with latitude and to reverse that process, as well as making the ocean the world’s primary carbon sink.
The Milankovic cycles have been concentrating insolation in the tropics with the declining obliquity of the Earth’s spin axis for the last 10 millennia. Perihelion has been adding to that by moving north since the mid-13th century. The declining eccentricity of the Earth’s orbits has been adding to that by increasing the already supersonic speed of the Earth’s rotation and will continue to do so for about another 30,000 years. The increasing the centrifugal force (inertia) has been causing the atmospheric CO2 concentration to increase. However, as sea levels continue to decline at the highest latitudes (see Post-glacial rebound – Wikipedia) and will cause the shallow seas in the tropics to start running dry in about 5 millennia from now, CO2 emissions will start to decline accordingly.
This plot shows the day length (LOD) variations from Wikipedia and how these have been shortening by milliseconds as a result of the increasing speed of the Earth’s rotation from the declining eccentricity of the Earth’s orbits.
The oscillations match the the variations in the sun’s barycentric motions caused by the gravity and orbits of the 4 outermost planets (JSUN) with 99.6% of the planetary mass that control the ~11-year solar cycle, as well as the sun’s ~22-year magnetic cycle due to the vertical motion of Jupiter and Saturn with respect to the plane of the solar equator caused by the inclinations of their orbits with respect to that plane and controlled by the orientation of the gravity of the Milky Way galaxy.
These are the solar orbits around the barycentre of the solar system from 1970–2022 as generated with the Solar Simulator 2 (can be downloaded free of charge, no strings attached). As can be seen from the prior LOD image, the SS2 shows that when the solar motion is small, day lengths increase and when the solar orbits are large, day lengths reduce. This makes it highly probable that the minute changes in the global mean temperatures by fractions of a degree that may be picked up with climate models are from the annual variations in day lengths instead of CO2 increases.
This graph (own work, based on NASA JPL Horizons ephemerides) shows that the changes in the Earth’s climate have been happening as a result of the changing shapes of the JSUN orbits for the last 2 millennia (and before that) and their always changing perihelion distances. They show the real reasons for climate change with a 973-year millennial cycle, as well as the roughly 60-year cycle of the phasing of the orbits and great conjunctions of Jupiter and Saturn according to the 5:2 ratio of their orbital periods of 12 years and 29.5 years respectively.
The ~60-year great conjunction cycle of Jupiter and Saturn has long been recognised by ancient astronomers and in the Chinese calendar. The cycle peaked in 2019 and the vertical motion of all 4 of the outermost planets, Jupiter (318 E-mass), Saturn (95 E-mass), Uranus 14.5 E-mass), and Neptune 17.1 E-mass) to a total of 99.6% of the planetary mass all converged well south of the plane of the solar equator in 2022, pulling the Earth with just 0.22% of the planetary mass a bit further south too and exposing more of the northern hemisphere to the sun. And that’s just one of the anthropogenic global warming (AGW)/climate change tricks, cherry picking the hemispheres and the poles at certain times.
This image (own work) of the vertical motion of the 4 outermost planets (JSUN) with 99.6% of the planetary mass shows that according to the NASA JPL Horizons ephemerides their orbits put all 4 of them well below the plane of the solar equator with the effect of forcing the Earth orbits a bit further south too and exposing the Arctic to more insolation.
At the temperatures of the troposphere are above the freezing point of CO2 it is transparent to electromagnetic radiation., but not when frozen as dry ice in the lower stratosphere with sub-100 C temperatures. In the troposphere, the up to 100 times higher concentration of the lighter than air H2O molecules suspend the CO2 molecules and prevent these from forming a dense high pressure high temperature surface layer as they do on Venus where 1 day takes longer than a year.
It follows that driving the best and the largest evaporative cooling and air-conditioning system on Earth is the centrifugal force (inertia) of the supersonic roughly 1,677 km/h (1,042 mph) equatorial speed of the Earth’s rotation and mountain ranges that spins CO2 out into the upper atmosphere. On the way back down, CO2 loses its energy in the lower stratosphere and freezing when reaching -78.5 C to become reflective as dry ice but that radiation, where and when it happens is too weak to have any effect on a much warmer troposphere where CO2 gets defrosted by bonding with H2O molecules and helping these condense, form clouds, and precipitate as slightly acid rain, pH of 5.6 or less but increasing inversely proportional to latitude. The reason for that upward pH gradient toward the poles is from H2O requiring fewer CO2 molecules to precipitate as temperatures decline and the centrifugal force (inertia) of the Earth’s 24-hour rotation period goes to zero. The Earth’s oblateness also causes gravity to increase to its maximum by bringing the surface at the poles closer to the Earth’s core.
So, the simple proposition is that in the tropics, where the intensity of solar radiation is the greatest, where humidity and cloud cover are the highest, and where the surface temperatures are high, water in the atmosphere does more reflecting while transporting solar energy to higher latitudes to precipitate and where opposite conditions make water in the atmosphere do more reflecting of surface energy as infrared radiation. However, as we well know, water does not reflect all of the surface energy but lets a lot of that through to still leave a substantial cooling effect, as can be noticed from snow and ice accumulation. It means that what shade cloth is to solar radiation in warmer climates, moisture in the air is to surface radiation in colder climates. And, deserts show that where moisture is low, the temperatures plummet overnight.
Simply put, we cannot have any control over Earth’s global mean temperatures without significantly increasing the supply of solar energy or changing the distribution of insolation, to melt some of the snow and ice in the Arctic or on Antarctica and raising sea levels. Doing so artificially would reduce the impacts of the impending ice age to some extent (not to be advised from an evolution point of view) by maintaining higher sea levels and keeping the continental shelves covered by water instead of drying out as they are known to have done during the last few ice ages and on the last occasion permitted our early-ancestors to leave Africa and migrate to other continents.
It follows, that as a ‘greenhouse gas’ CO2 is irrelevant by doing the opposite of what is claimed in support of the climate change hoax and Ponzi scheme, aimed at making us change over to alternatives energy sources to fossil fuels to prevent these from running out during the further cooling of this millennium, as well as making some people a hell of a lot of money. Not the least in that are Elon Musk and the oil, gas, and coal companies that love the higher energy prices from Saudi Arabia cutting back oil production but most tragically also fuelling past and present oil wars including the current wars in Ukraine and Gaza.
And in the Longer Term, Geoclimatic forces will continue to operate:
Here’s a great short video for those who like to think science is settled on global warming/climate change, as only one example of hubris despite our limited understanding of natural phenomena. Further on is a discussion of the climate system we see as chaotic, another way of saying its behavior surpasses our understanding.
Readers here will know that I report frequently on the changes in Arctic ice extents during the year. So I was impressed to learn about fundamental mysteries underlying even this ordinary process. We do know a lot about the phase change of liquid water into ice. And we have a theoretical law that is predictable, but only when water is absolutely pure, i.e. only H2O with no gases or impurities dissolved in the sample. As the researcher explains, almost all of the water in nature has impurities and thus parts of the process are still beyond our scientific knowledge.
Our Chaotic Climate System
h/t tom0mason for inspiring this post, including his comment below
Foucault’s pendulum in the Panthéon, Paris
The Pendulum is Settled Science
I attended North Phoenix High School (Go Mustangs!) where students took their required physics class from a wild and crazy guy. Decades later alumni who don’t remember his name still reminisce about “the crazy science teacher with the bowling ball.”
To demonstrate the law of conservation of energy, he required each and every student to stand on a ladder in one corner of the classroom. Attached to a hook in the center of the rather high ceiling was a rope with a bowling ball on the other end. The student held the ball to his/her nose and then released it, being careful to hold still afterwards.
The 16 pound ball traveled majestically diagonally across the room and equally impressively returned along the same path. The proof of concept was established when the ball stopped before hitting your nose (though not by much). In those days we learned to trust science and didn’t need to go out marching to signal some abstract virtue.
The equations for pendulums are centuries old and can predict the position of the ball at any point in time based on the mass of the object, length of the rope and starting position.
Pictured above is the currently operating Foucault pendulum that exactly follows these equations. While it had long been known that the Earth rotates, the introduction of the Foucault pendulum in 1851 was the first simple proof of planetary rotation in an easy-to-see experiment. Today, Foucault pendulums are popular displays in science museums and universities.
What About the Double Pendulum?
Trajectories of a double pendulum
A comment by tom0mason at alerted me to the science demonstrated by the double compound pendulum, that is, a second pendulum attached to the ball of the first one. It consists entirely of two simple objects functioning as pendulums, only now each is influenced by the behavior of the other.
Lo and behold, you observe that a double pendulum in motion produces chaotic behavior. In a remarkable achievement, complex equations have been developed that can and do predict the positions of the two balls over time, so in fact the movements are not truly chaotic, but with considerable effort can be determined. The equations and descriptions are at Wikipedia Double Pendulum
Long exposure of double pendulum exhibiting chaotic motion (tracked with an LED)
But here is the kicker, as described in tomomason’s comment:
If you arrive to observe the double pendulum at an arbitrary time after the motion has started from an unknown condition (unknown height, initial force, etc) you will be very taxed mathematically to predict where in space the pendulum will move to next, on a second to second basis. Indeed it would take considerable time and many iterative calculations (preferably on a super-computer) to be able to perform this feat. And all this on a very basic system of known elementary mechanics.
And What about the Climate?
This is a simple example of chaotic motion and its unpredictability. How predictable is our climate with so many variables and feedbacks, some known some unknown? Consider that this planet’s weather/climate system is chaotic in nature with many thousands (millions?) of loosely coupled variables and dependencies, and many of these variables have very complex feedback features within them.
Hurricane Gladys, photographed from orbit by Apollo 7 in 1968 (Photo: NASA)
Summary
To quote the IPCC:
The climate system is a coupled non-linear chaotic system, and therefore the long-term prediction of future climate states is not possible. Rather the focus must be upon the prediction of the probability distribution of the system’s future possible states by the generation of ensembles of model solutions.
But as the IPCC emphasizes, the range for future projections remains enormous. The central question is “climate sensitivity” — the amount of warming that accompanies a doubling of carbon dioxide in the atmosphere. As of its Fifth Assessment Report in 2013, the IPCC could estimate only that this sensitivity is somewhere between 1.5 and 4.5°C. Nor is science narrowing that range. The 2013 assessment actually widened it on the low end, from a 2.0–4.5°C range in the prior assessment. And remember, for any specific level of warming, forecasts vary widely on the subsequent environmental and economic implications.
For now, though, navigating the climate debate will require translating the phrase “climate denier” to mean “anyone unsympathetic to the most aggressive activists’ claims.” This apparently includes anyone who acknowledges meaningful uncertainty in climate models, adopts a less-than-catastrophic outlook about the consequences of future warming, or opposes any facet of the activist policy agenda. The activists will be identifiable as the small group continuing to shout “Denier!” The “deniers” will be identifiable as everyone else.
Climate System Summation
Esteemed climate scientist Richard Lindzen ends a very fine recent presentation (here) with this description of the climate system:
I haven’t spent much time on the details of the science, but there is one thing that should spark skepticism in any intelligent reader. The system we are looking at consists in two turbulent fluids interacting with each other. They are on a rotating planet that is differentially heated by the sun. A vital constituent of the atmospheric component is water in the liquid, solid and vapor phases, and the changes in phase have vast energetic ramifications. The energy budget of this system involves the absorption and reemission of about 200 watts per square meter. Doubling CO2 involves a 2% perturbation to this budget. So do minor changes in clouds and other features, and such changes are common. In this complex multifactor system, what is the likelihood of the climate (which, itself, consists in many variables and not just globally averaged temperature anomaly) is controlled by this 2% perturbation in a single variable? Believing this is pretty close to believing in magic. Instead, you are told that it is believing in ‘science.’ Such a claim should be a tip-off that something is amiss. After all, science is a mode of inquiry rather than a belief structure.
Flow Diagram for Climate Modeling, Showing Feedback Loops
This reportis written for people wishing to form their own opinion on issues relating to climate. Its focus is on publicly available observational datasets, and not on the output of numerical models, although there are a few exceptions, such as Figure 42. References and data sources are listed at the end.
The observational data presented here reveal a vast number of natural variations, some of which appear in more than one series. The existence of such natural climatic variations is not always fully acknowledged, and therefore generally not considered in contemporary climate conversations. The drivers of most of these climatic variations are not yet fully understood, but should represent an important focus for climatic research in future.
In this report, meteorological and climatic observations are described according to the following overall structure: atmosphere, oceans, sea level, sea ice, snow cover, precipitation, and storms. Finally, in the last section (below), the observational evidence as at 2023 is briefly summarised.
Ten facts about the year 2023
1. Air temperatures in 2023 were the highest on record (since 1850/1880/1979, according to the particular data series). Recent warming is not symmetrical, but is mainly seen in the Northern Hemisphere (Figures 1 and 13).
Figure 1: 2023 surface air temperatures compared to the average for the previous 10 years. Green-yellow-red colours indicate areas with higher temperature than the average, while blue colours indicate lower than average temperatures. Data source: Remote Sensed Surface Temperature Anomaly, AIRS/Aqua L3 Monthly Standard Physical Retrieval 1-degree x 1-degree V006 (https://airs.jpl.nasa.gov/), obtained from the GISS data portal (https://data.giss.nasa.gov/gistemp/maps/).
Figure 13: Zonal air temperatures. Global monthly average lower troposphere temperature since 1979 for the tropics and the northern and southern extratropics, according to University of Alabama at Huntsville, USA. Thin lines: monthly value; thick lines: 3-year running mean.
2. Arctic air temperatures have increased during the satellite era (since 1979), but Antarctic temperatures remain essentially stable (Figure 14).
Figure 14: Polar temperatures Global monthly average lower troposphere temperature since 1979 for the North and South Pole regions, according to University of Alabama at Huntsville (UAH), USA. Thick lines are the simple running 37-month average.
3. Since 2004, globally, the upper 1900m of the oceans has seen net warming of about 0.037°C. The greatest warming (of about 0.2°C) is in the uppermost 100m, and mainly in regions near the Equator, where the greatest amount of solar radiation is received (Figure 28).
Figure 28: Temperature changes 0–1900m Global ocean net temperature change since 2004 from surface to 1900m depth, using Argo-data. Source: Global Marine Argo Atlas.
4. Since 2004, the northern oceans (55–65°N) have, on average, experienced a marked cooling down to 1400m depth, and slight warming below that (Figure 29). Over the same period, the southern oceans (55–65°S) have, on average, seen some warming at most depths (above 1900m), but mainly near the surface.
Figure 29: Temperature changes 0–1900m Global ocean net temperature change since 2004 from surface to 1900m depth. Source: Global Marine Argo Atlas
5. Sea level globally is increasing at about 3.4 mm per year or more according to satellites, but only at 1-2 mm per year according to coastal tide gauges (Figures 39 and 41). Local and regional sea-level changes usually deviate significantly from such global averages.
Figure 39: Global sea level change since December 1992 The two lower panels show the annual sea level change, calculated for 1- and 10-year time windows, respectively. These values are plotted at the end of the interval considered. Source: Colorado Center for Astrodynamics Research at University of Colorado at Boulder. The blue dots are the individual observations (with calculated GIA e”ect removed), and the purple line represents the running 121-month (ca. 10-year) average.
Figure 41: Holgate-9 monthly tide gauge data from PSMSL Data Explorer The Holgate-9 are a series of tide gauges located in geologically stable sites. The two lower panels show the annual sea level change, calculated for 1- and 10-year time windows, respectively. These values are plotted at the end of the interval considered. Source: Colorado Center for Astrodynamics Research at University of Colorado at Boulder. The blue dots are the individual observations, and the purple line represents the running 121-month (ca. 10-year) average.
6. Global sea-ice extent remains well below the average for the satellite era (since 1979). Since 2018, however, it has remained quasistable, perhaps even exhibiting a small increase (Figure 43).
Figure 43: Global and hemispheric sea ice extent since 1979 12-month running means. The October 1979 value represents the monthly average of November 1978–October 1979, the November 1979 value represents the average of December 1978–November 1979, etc. The stippled lines represent a 61-month (ca. 5 years) average. The last month included in the 12-month calculations is shown to the right in the diagram. Data source: National Snow and Ice Data Center (NSIDC).
7. Global snow cover has remained essentially stable throughout the satellite era (Figure 47), although with important regional and seasonal variations.
Figure 47: Northern hemisphere weekly snow cover since 2000(a) Since January 2000 and (b) Since 1972. Source: Rutgers University Global Snow Laboratory. The thin blue line is the weekly data, and the thick blue line is the running 53-week average (approximately 1 year). The horizontal red line is the 1972–2022 average.
8. Global precipitation varies from more than 3000mm per year in humid regions to almost nothing in deserts. Global average precipitation exhibits variations from one year to the next, and from decade to decade, but since 1901 there has been no clear overall trend (Figure 50).
Figure 50: Global precipitation anomalies. Variation of annual anomalies in relation to the global average precipitation from 1901 to 2021 based on rainfall and snowfall measurements from land-based weather stations worldwide. Data source: United States Environmental Protection Agency (EPA).
9. Storms and hurricanes display variable frequency over time, but without any clear global trend towards higher or lower values (Figure 51).
Figure 51: Annual global accumulated cyclone energy Source: Ryan Maue.
10. Observations confirm the continuing long-term variability of average meteorological and oceanographic conditions, but do not support the notion of an ongoing climate crisis.
Summing up
The global climate system is multifaceted, involving sun, planets, atmosphere, oceans, land, geological processes, biological life, and complex interactions between them. Many components and their mutual coupling are still not fully understood or perhaps not even recognised.
Believing that one minor constituent of the atmosphere (CO2)controls nearly all aspects of climate is naïve and entirely unrealistic.
The global climate has remained in a quasi-stable condition within certain limits for millions of years, although with important variations playing out over periods ranging from years to centuries or more, but the global climate has never been in a fully stable state without change.
Modern observations show that this behaviour continues today;
there is no evidence of a global climate crisis.
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Assessing human impacts on climate and biodiversity requires an understanding of the relationship between the concentration of carbon dioxide (CO2) in the Earth’s atmosphere and global temperature (T). Here I explore this relationship empirically using comprehensive, recently-compiled databases of stable-isotope proxies from the Phanerozoic Eon (~540 to 0 years before the present) and through complementary modeling using the atmospheric absorption/ transmittance code MODTRAN.
Atmospheric CO2 concentration is correlated weakly but negatively with linearly-detrended T proxies over the last 425 million years.
Of 68 correlation coefficients (half non-parametric) between CO2 and T proxies encompassing all known major Phanerozoic climate transitions, 77.9% are non-discernible (p > 0.05) and 60.0% of discernible correlations are negative. Marginal radiative forcing (ΔRFCO2), the change in forcing at the top of the troposphere associated with a unit increase in atmospheric CO2 concentration, was computed using MODTRAN. The correlation between ΔRFCO2 and linearly-detrended T across the Phanerozoic Eon is positive and discernible, but only 2.6% of variance in T is attributable to variance in ΔRFCO2.
Spectral analysis, auto- and cross-correlation show that proxies for T, atmospheric CO2 concentration and ΔRFCO2 oscillate across the Phanerozoic, and cycles of CO2 and ΔRFCO2 are antiphasic. A prominent 15 million-year CO2 cycle coincides closely with identified mass extinctions of the past, suggesting a pressing need for research on the relationship between CO2, biodiversity extinction, and related carbon policies.
This study demonstrates that changes in atmospheric CO2 concentration did not cause temperature change in the ancient climate.
Introduction
The role of atmospheric CO2 in climate includes short- and long-term aspects. In the short term, atmospheric trace gases including CO2 are widely considered to affect weather by influencing surface sea temperature anomalies and sea-ice variation, which are key leading indicators of annual and decadal atmospheric circulation and consequent rainfall, drought, floods and other weather extremes [33–37]. Understanding the role of atmospheric CO2 in forcing global temperature, therefore has the potential to improve weather forecasting.
In the long term, the Intergovernmental Panel on Climate Change (IPCC) promulgates a significant role for CO2 in forcing global climate, estimating a “most likely” sensitivity of global temperature to a doubling of CO2 concentration as 2–4 °C [29–31]. Policies intended to adapt to the projected consequences of global warming and to mitigate the projected effects by reducing anthropogenic CO2 emissions are on the agenda of local, regional and national governments and international bodies.
The compilation in the last decade of comprehensive empirical databases containing proxies of Phanerozoic temperature and atmospheric CO2 concentration enables a fresh analytic approach to the CO2/T relationship. The temperature-proxy databases include thousands of measurements by hundreds of investigators for the time period from 522 to 0 Mybp [28,38,39], while proxies for atmospheric CO2 from the Phanerozoic Eon encompass 831 measurements reported independently by hundreds of investigators for the time period from 425 to 0 Mybp [40]. Such an unprecedented volume of data on the Phanerozoic climate enables the most accurate quantitative empirical evaluation to date of the relationship between atmospheric CO2 concentration and temperature in the ancient climate, which is the purpose of this study.
I report here that proxies for temperature and atmospheric CO2 concentration are generally uncorrelated across the Phanerozoic climate, showing that atmospheric CO2 did not drive the ancient climate.
The concentration of CO2 in the atmosphere is a less-direct measure of its effect on global temperature than marginal radiative forcing, however, which is nonetheless also generally uncorrelated with temperature across the Phanerozoic. The present findings from the Phanerozoic climate provide possible insights into the role of atmospheric CO2 in more recent glacial cycling and for contemporary climate science and carbon policies. Finally, I report that the concentration of atmospheric CO2 oscillated regularly during the Phanerozoic and peaks in CO2 concentration closely match the peaks of mass extinctions identified by previous investigators. This finding suggests an urgent need for research aimed at quantifying the relationship between atmospheric CO2 concentration and past mass extinctions. I conclude that that limiting anthropogenic emissions of CO2 may not be helpful in preventing harmful global warming, but may be essential to conserving biodiversity.
Discussion of Temperature versus Atmospheric Carbon Dioxide
Temperature and atmospheric CO2 concentration proxies plotted in the same time series panel (Figure 5) show an apparent dissociation and even an antiphasic relationship. For example, a CO2 concentration peak near 415 My occurs near a temperature trough at 445 My. Similarly, CO2 concentration peaks around 285 Mybp coincide with a temperature trough at about 280 My and also with the Permo-Carboniferous glacial period (labeled 2 in Figure 5). In more recent time periods, where data sampling resolution is greater, the same trend is visually evident. The atmospheric CO2 concentration peak near 200 My occurs during a cooling climate, as does another, smaller CO2 concentration peak at approximately 37 My. The shorter cooling periods of the Phanerozoic, labeled 1–10 in Figure 5, do not appear qualitatively, at least, to bear any definitive relationship with fluctuations in the atmospheric concentration of CO2.
[My Comment: Antiphasic in this context refers to times when temperatures are rising while CO2 is declining, and also periods when temperatures are falling while CO2 is going higher. These negative correlations are to be expected if temperature is the leading variable and CO2 the dependent variable.]
Regression of linearly-detrended temperature proxies (Figure 3b, lower red curve) against atmospheric CO2 concentration proxy data reveals a weak but discernible negative correlation between CO2 concentration and T (Figure 6). Contrary to the conventional expectation, therefore, as the concentration of atmospheric CO2 increased during the Phanerozoic climate, T decreased. This finding is consistent with the apparent weak antiphasic relation between atmospheric CO2 concentration proxies and T suggested by visual examination of empirical data (Figure 5). The percent of variance in T that can be explained by variance in atmospheric CO2 concentration, or conversely, R2 × 100, is 3.6%. Therefore, more than 95% of the variance in T is explained by unidentified variables other than the atmospheric concentration of CO2.
Regression of non-detrended temperature against atmospheric CO2 concentration shows a weak but discernible positive correlation between CO2 concentration and T. This weak positive association may result from the general decline in temperature accompanied by a weak overall decline in CO2 concentration.
The correlation coefficients between the concentration of CO2 in the atmosphere and T were computed also across 15 shorter time segments of the Phanerozoic.
These time periods were selectedto include or bracket the three major glacial periods of the Phanerozoic, ten global cooling events identified by stratigraphic indicators, and major transitions between warming and cooling of the Earth designated by the bar across the top of Figure 5. The analysis was done separately for the most recent time periods of the Phanerozoic, where the sampling resolution was highest (Table 1), and for the older time periods of the Phanerozoic, where the sampling resolution was lower (Table 2).
For the most highly-resolved Phanerozoic data (Table 1), 12/15 (80.0%) Pearson correlation coefficients computed between atmospheric CO2 concentration proxies and T proxies are non-discernible (p > 0.05). Of the three discernible correlation coefficients, all are negative, i.e., T and atmospheric CO2 concentration are inversely related across the corresponding time periods.
For the less highly-resolved older Phanerozoic data (Table 2), 14/20 (70.0%)Pearson correlation coefficients computed between atmospheric CO2 concentration and T are non-discernible. Of the six discernible correlation coefficients, two are negative. For the less-sampled older Phanerozoic (Table 2), 17/20 (85.0%) Spearman correlation coefficients are non-discernible. Of the three discernible Spearman correlation coefficients, one is negative.
Combining atmospheric CO2 concentration vs. T correlation coefficients from both tables, 53/68 (77.9%) are non-discernible, and of the 15 discernible correlation coefficients, nine (60.0%) are negative.
These data collectively support the conclusion that the atmospheric concentration of CO2 was largely decoupled from T over the majority of the Phanerozoic climate.
The finding that periodograms of atmospheric CO2 concentration proxies and T proxies exhibit different frequency profiles implies that atmospheric CO2 concentration and T oscillated at different frequencies during the Phanerozoic, consistent with disassociation between the respective cycles. This conclusion is corroborated by auto- and cross-correlation analysis.
If ΔRFCO2 is a more direct indicator of the impact of CO2 on temperature than atmospheric concentration as hypothesized, then the correlation between ΔRFCO2 and T over the Phanerozoic Eon might be expected to be positive and statistically discernible. This hypothesis is confirmed (Figure 9). This analysis entailed averaging atmospheric CO2 concentration in one-My bins over the recent Phanerozoic and either averaging or interpolating CO2 values over the older Phanerozoic (Methods). Owing to the relatively large sample size, the Pearson correlation coefficient is statistically discernible despite its small value (R = 0.16, n = 199), with the consequence that only a small fraction (2.56%) of the variance in T can be explained by variance in ΔRFCO2 (Figure 9). Even though the correlation coefficient between ΔRFCO2 and T is positive and discernible as hypothesized, therefore, the correlation coefficient can be considered negligible and the maximum effect of ΔRFCO2 on T is for practical purposes insignificant (<95%).
Conclusions
The principal findings of this study are that neither the atmospheric concentration of CO2 nor ΔRFCO2 is correlated with T over most of the ancient (Phanerozoic) climate.
Over all major climate transitions of the Phanerozoic Eon, about three-quarters of 136 correlation coefficients computed here between T and atmospheric CO2 concentration, and between T and ΔRFCO2, are non-discernible, and about half of the discernible correlations are negative. Correlation does not imply causality, but the absence of correlation proves conclusively the absence of causality [63]. The finding that atmospheric CO2 concentration and ΔRFCO2 are generally uncorrelated with T, therefore, implies either that neither variable exerted significant causal influence on T during the Phanerozoic Eon or that the underlying proxy databases do not accurately reflect the variables evaluated.
The generally weak or absent correlations between the atmospheric concentration of CO2 and T,and between ΔRFCO2 and T, imply that other, unidentified variables caused most (>95%) of the variance in T across the Phanerozoic climate record. The dissimilar structures of periodograms for T and atmospheric CO2 concentration found here also imply that different but unidentified forces drove independent cyclic fluctuations in T and CO2. Since cycles in atmospheric CO2 concentrationoccur independently of temperature cycles, the respective rhythms must have a different etiology. It has been suggested that volcanic activity and seafloor spreading produce periodic CO2 emissions from the Earth’s mantle ([69] and references therein) which could in principle increase radiative forcing of temperature globally.
The present findings corroborate the earlier conclusion based on study of the Paleozoic climate that “global climate may be independent of variations in atmospheric carbon dioxide concentration.” [64] (p. 198). The present study shows further, however, that past atmospheric CO2 concentration oscillates on a cycle of 15–20 My and an amplitude of a few hundred to several hundreds of ppmv. A second longer cycle oscillates at 60–70 My. As discussed below, the peaks of the ~15 My cycles align closely with the times of identified mass extinctions during the Phanerozoic Eon, inviting further research on the relationship between atmospheric CO2 concentration and mass extinctions during the Phanerozoic.
My Added Comment
Some climatists will admit that CO2 changes did not cause ancient climate changes, but then assert that everything shifted when humans began burning hydrocarbons and releasing CO2. Somehow natural processes ceased and now only warming can occur due to CO2 added by humans. On the contrary, we can look more recently at the recovery from the LIA (Little Ice Age) to see the same antiphasic pattern described in the above paper.
Moberg is a highly respected recontruction of NH temperatures over the last 2000 years. It shows peak warming after 1000, followed by a sharp cooling hitting bottom by 1600. Kouwenberg is a CO2 time series based on plant stomata proxies. For 250 years during the cooling, CO2 was rising, and then later CO2 was declining for 240 years while temperatures were rising.
As for the 20th century, consider the graph from climate4you (KNMI Climate Explorer)
Even with modern instrumental temperature records, correlation is inconsistent between temperature and CO2. Much ado is made about the happenstance of positive linking between the 1990s to 2007, while ignoring the negative relation earlier, and a weak connection since. The latter period is obviously driven by oceanic ENSO activity rather than CO2 radiation.
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Figure 16. Model reproduction of the monthly observations of evolution of δ13C at Barrow: (upper) without update of initial conditions and (lower) with update of initial conditions in each step by the δ13C observations.
Recent studies have provided evidence, based on analyses of instrumental measurements of the last seven decades, for a unidirectional, potentially causal link between temperature as the cause and carbon dioxide concentration ([CO2]) as the effect. In the most recent study, this finding was supported by analysing the carbon cycle and showing that the natural [CO2] changes due to temperature rise are far larger (by a factor > 3) than human emissions, while the latter are no larger than 4% of the total. Here, we provide additional support for these findings by examining the signatures of the stable carbon isotopes, 12 and 13. Examining isotopic data in four important observation sites, we show that the standard metric δ13C is consistent with an input isotopic signature that is stable over the entire period of observations (>40 years), i.e., not affected by increases in human CO2 emissions. In addition, proxy data covering the period after 1500 AD also show stable behaviour.
These findings confirm the major role of the biosphere in the carbon cycle
and a non-discernible signature of humans.
Introduction
In recent years, a decrease in atmospheric δ13C has been observed, which is often termed theSuess Effect after Suess (1955) [11], who published the first observations on this phenomenon on trees, albeit using 14C data. He attributed the decrease to human activities, stating:
The decrease [in the specific 14C activity of wood at time of growth during the past 50 years] can be attributed to the introduction of a certain amount of C14-free CO2 into the atmosphere by artificial coal and oil combustion and to the rate of isotopic exchange between atmospheric CO2 and the bicarbonate dissolved in the oceans.
There is no question that δ13C has been decreasing and that human emissions have been increasing since the Industrial Revolution (Figure 2). Also, as seen in Figure 1, the combustion of fossil fuels can have an effect on reducing δ13C, as they are relatively depleted in 13C. This was the line of thought behind Suess [11] (even though the above quotation refers to 14C) and has become a common conviction thereafter.
Figure 2. (left) Compiled data set of annual mean, global mean values for δ13C in atmospheric CO2, from Graven et al. [12], reconstructed after digitisation of Figure 3 of Graven et al. [8]; and (right) evolution of global human carbon emissions [13,14], after conversion from CO2 to C (dividing by 3.67).
For example, Andres et al. [15,16] stated:
The carbon isotopic (δ13C, PDB) signature of fossil fuel emissions has decreased during the last century, reflecting the changing mix of fossil fuels produced.
Also, in their recent review paper, Graven et al. [8] noted:
Since the Industrial Revolution, the carbon isotopic composition of atmospheric CO2 has undergone dramatic changes as a result of human activities and the response of the natural carbon cycle to them. The relative amount of atmospheric 14C and 13C in CO2 has decreased because of the addition of 14C- and 13C-depleted fossil carbon.
These generally accepted hypotheses, however, may reflect a dogmatic approach, or a postmodern ideological effect, i.e., to blame everything on human actions. Hence, the null hypothesis that all observed changes are (mostly) natural has not seriously been investigated. However, there are good reasons for this investigation. It is a fact that the biosphere has become more productive and expanded [5,17,18,19], resulting in natural amplification of the carbon cycle due to increased temperature. This fact may have been a primary factor for the decrease in the isotopic signature δ13C in atmospheric CO2. Note that the emissions of the biosphere are much larger than fossil fuel emissions (where the latter are only 4% of the total) [5] and, as seen in Figure 1, the biosphere’s isotopic signature δ13C is much lower than the atmospheric (see also Section 6).
Figure 1. Typical ranges of isotopic signatures δ13C for each of the pools interacting with atmospheric CO2, and related exchange processes.
In addition to the biosphere’s action, other natural factors also affect the input isotopic signature in the atmospheric CO2. These include volcano eruptions, among which, in the recent period, the Pinatubo eruption in 1991 is regarded as the most important, as well as the interannual variability related to El Niño—Southern Oscillation (ENSO) [8].
To investigate the null hypothesis and answer the two research questions posed above, we use modern instrumental and proxy data, as described in Section 2. We develop a theoretical framework in Section 3, which we apply to the data in a diagnostic mode in Section 4, and in a modelling mode in Section 5. The findings of these applications are further discussed in Section 6 and the conclusions are drawn in Section 7.
Discussion
With only two parameters, δ13CU and δ13CD, which represent the input isotopic signatures for the seasonal increasing and decreasing phases of [CO2], respectively, we are able to effectively model the isotopic signature δ13C of the atmosphere for the entire observation period. Of these parameters, δ13CD, reflecting the fractionation by photosynthesis, can be assumed as the same for the entire globe, while δ13CU varies, with smaller (more negative) values as we go north and higher (less negative) values as we go south. This spatial variation of δ13CU reflects the differences of the strength of seasonality in [CO2] and δ13C, which is at a maximum toward the North Pole and at a minimum at the South Pole.
The strong seasonality at high latitudes north is probably related to the processes in boreal vegetation, the dominance of snow and ice in winter, and the absence of photosynthesis during the 6-month night (note that Barrow, at a latitude of 71.3° N, is more north than the Artic Circle at 66.6° N). As we go south, some of these features cease to occur, and seasonality becomes less prominent, as photosynthesis occurs throughout the entire year, albeit with varying intensities. The minimal seasonality in the South Pole is probably related to the absence of vegetation due to the minimal appearance of land beyond a latitude of 43° S (with the exception of the frozen continent of Antarctica and a relatively small wedge of land in South America). All these suggest the dominance of terrestrial biosphere processes in driving [CO2] and δ13C.
Considering the fact that, as seen in Figure 2 (above), the human carbon emissions per year have doubled in the observed time period, if these were a key factor, this would somehow be reflected in a trend in the seasonality. Therefore, no sign is discerned that would necessitate an attribution to the influence of fossil fuel emissions. In contrast, continuity suggests that the key processes in CO2 emissions are related to biosphere processes such as respiration and photosynthesis. . Despite differences in seasonality, the over-annual input isotopic signature δ13CI remains almost the same globally, as seen in Table 4, which summarizes the results of all analyses, diagnostic and modelling, suggesting similar values, irrespective of the method used. This is not difficult to explain as, in the long run, CO2 is well mixed in the atmosphere; thus regional differences in seasonal δ13CI tend to disappear.
In both the diagnostic and the modelling phases of this paper, the inclusion of human emissions proved unnecessary. This may contrast with common opinion, which blames all changes on humans, but is absolutely reasonable, as humans are responsible for only 4% of carbon emissions. In addition, the vast majority of changes in the atmosphere since 1750 are due to natural processes, respiration and photosynthesis, as articulated in the recent study by Koutsoyiannis et al. [5] and schematically depicted in Figure 22, reproduced from that study.
Figure 22. Annual carbon balance in the Earth’s atmosphere, in Gt C/year, based on the IPCC estimates (Figure 5.12 of [30]). The balance of 5.1 Gt C/year is the annual accumulation of carbon (in the form of CO2) in the atmosphere (reproduced from [5].).
The following observations can be noted in Figure 22: (a) the terrestrial biosphere processes are much stronger than the maritime ones in terms of both production and absorption of CO2; (b) the CO2 emissions by even the ocean biosphere are much larger than human emissions; and (c) the modern (post 1750) CO2 additions to pre-industrial quantities (red bars in the right-hand part of the graph, corresponding to positive values) exceed the human emissions by a factor of ~4.5. These observations provide explanations for the findings of this study.
Furthermore, it is relevant to note the minor role of CO2 in the greenhouse effect. As shown in a recent study by Koutsoyiannis and Vournas, despite the increase in [CO2] by more than 30% in a century-long period, the strength of the greenhouse effect has not changed in a manner discernible in the radiation data. The greenhouse effect is dominated by the presence of water vapour in the atmosphere, rather than CO2. That study isRevisiting the greenhouse effect – a hydrological perspective in Hydrological Sciences Journal, 2023.
Conclusions
The results of the analyses in this paper provide negative answers to the research questions posed in the Introduction. Specifically:
♦ From modern instrumental carbon isotopic data of the last 40 years, no signs of human (fossil fuel) CO2 emissions can be discerned; ♦ Proxy data since the Little Ice Agesuggest that the modern period of instrumental data does not differ, in terms of the net isotopic signature of atmospheric CO2 sources and sinks, from earlier centuries.
Combined with earlier studies, namely [2,3,4,5,31], these findings allow for the following line of thought to be formulated, which contrasts the dominant climate narrative, on the basis that different lines of thought are beneficial for the progress of science, even though they are not welcomed by those with political agendas promoting the narratives (whose representatives declare that they “own the science”, as can be seen in the motto in the beginning of the paper).
In the 16th century, Earth entered a cool climatic period, known as the Little Ice Age, which ended at the beginning of the 19th century;
Immediately after, a warming period began, which has lasted until now. The causes of the warming must be analogous to those that resulted in the Medieval Warm Period around 1000 AD, the Roman Climate Optimum around the first centuries BC and AD, the Minoan Climate Optimum at around 1500 BC, and other warming periods throughout the Holocene
As a result of the recent warming, and as explained in [5], the biosphere has expanded and become more productive, leading to increased CO2 concentration in the atmosphere and greening of the Earth [17,18,19,32];
As a result of the increased CO2 concentration, the isotopic signature δ13C in the atmosphere has decreased;
The greenhouse effect on the Earth remained stable in the last century, as it is dominated by the water vapour in the atmosphere [31];
Human CO2 emissions have played a minor role in the recent climatic evolution, which is hardly discernible in observational data and unnecessary to invoke in modelling the observed behaviours, including the change in the isotopic signature δ13C in the atmosphere.
Overall, the findings in this paper confirm the major role of the biosphere
in the carbon cycle (and through this in climate)
and a non-discernible signature of humans.
One may associate the findings of the paper with several questions related to international policies:
♦ Do these results refute the hypothesis that CO2 emissions contribute to global warming through the greenhouse effect?
♦ Do these findings, by suggesting a minimal human impact on the isotopic composition of atmospheric carbon, contradict the need to reduce CO2 emissions?
♦ Are human carbon emissions independent from other forms of pollution, such as emissions of fine particles and nitrogen oxides, which can have harmful effects on human health and the environment?
These questions are not posed at all in the paper and certainly are not studied in it. Therefore, they cannot be answered on a scientific basis within the paper’s confined scope but require further research. The reader may feel free to study such questions and provide sensible replies. It is relevant to note that a reviewer implied these questions and suggested negative replies to each of them.
Meteorologist Cliff Mass explains at his blog El Nino’s Collapse Has Begun. Excerpts in italics with my bolds, added images and ending comment.
The entire character of this winter has been characterized by a strong El Nino.
El Nino impacts have included low snowpack over Washington State, huge snowpack and heavy precipitation over California, and warm temperatures over the Upper Plains states.
However, El Nino’s days are numbered and
its decline is proceeding rapidly right now.
First, consider the critical measure of El Nino: the sea surface temperatures in the central tropical Pacific (see graph above showing the Nino 3.4 area). The warmth of this El Nino peaked in late November (about 2.1°C above normal) and is now declining fairly rapidly (currently at roughly 1.3°C above normal).
But the cooling is really more dramatic than that:
a LOT of cooling has been happening beneath the surface!
To demonstrate this, take a look at subsurface temperatures (the difference from normal) for the lowest 300 m under the surface for a vertical cross-section across the Pacific (below).
On 8 January, there was a substantial warm layer extending about 100 m beneath the surface.
But look at the same cross-section on 27 February.
Wow–what a difference! The warm water has dramatically cooled, with only a thin veneer of warmth evident for much of the Pacific. Rapidly cooling has occurred beneath the surface and this cool water is about to spread to the surface.
If you really want to appreciate the profound cooling take a look at the amount of heat in the upper ocean for the western tropical Pacific (below, the difference from normal is being shown).
A very, very dramatic change has occurred. The heat content of the upper ocean peaked in late November and then plummeted. Declined so much that the water below the surface is now COOLER than normal.
El Nino fans will be further dismayed to learn that models are going for a continuous decline….so much so that they predict a La Nina next year!
My Comment: Why this shift from El Nino to La Nina matters
Global temperatures typically increase during an El Niño episode, and fall during La Niña. El Niño means warmer water spreads further, and stays closer to the surface. This releases more heat into the atmosphere, creating wetter and warmer air.
Air temperatures typically peak a few months after El Niño hits maximum strength, as heat escapes from the sea surface to the atmosphere.
In 2021, the UN’s climate scientists, the IPCC, said the ENSO events which have occurred since 1950 are stronger than those observed between 1850 and 1950. But it also said that tree rings and other historical evidence show there have been variations in the frequency and strength of these episodes since the 1400s.
The IPCC concluded there is no clear evidence that Climate Change™ has affected these events.
Roy Gilbert exposes the fundamental mistaken thinking regarded global warming/climate change. His Spectator Australia article is Conceptual Error in Climate Change Analysis. H/T John Ray Excerpts in italics with my bolds and added images.
It is often said that the ‘science is in on climate change’. Is it? We should always adhere to the principle of the ‘working hypothesis’ and have an open mind on scientific questions no matter how well-recognised the researchers are. In the study of science, there is always the chance new information can come along to cause a rethink.
A common error in problem-solving and policy development is to confuse
a technical strategy for a desired client outcome.
Our Climate Change Minister could be accused of this. Reducing emissions is a ‘strategy’, not the fundamental desired client outcome. With the mission ‘to reduce carbon emissions’ by increasing renewable energy, the way to assess performance is to concentrate on measuring emission reduction, and then to follow this up with how quickly the renewables are built and their cost (wind farms, solar panels, transmission lines).
Instead of the current strategy-driven mission, a fundamental client outcome statement would be: ‘To protect against, and where possible, prevent damage from extreme off-trend fluctuations in climate.’ How would you go about managing your program using this mission statement?
First, you gather accurate temperature, rainfall, and weather measurements. They are the valid and fundamental ‘outcome’ measures – not data on CO2 emissions. If there is an undeniable and dangerous increase in temperature and rainfall, more cyclones, and a clear and unabated rise in sea level, then the possible cause must be thoroughly identified. Depending on the answer, you would adopt appropriate mitigation strategies, or strategies that adapt to weather patterns and temperature levels.
Another principle of problem-solving is to map out the total picture and not be driven by ideology. The Climate Change Minister should consider possible causes other than human-induced emissions. It was announced in April 2023 that coronal cones 20 times larger than Earth have been discovered and may cause a massive outburst of energy from the sun. What could be the implications for our planet? Ask solar physicists.
Chief scientist in applied helio-physics at John Hopkins, Ian Cohen, has suggested that solar storms could take out satellites, cut power and shut down the internet. In 1972 a solar storm caused 4,000 magnetically sensitive mines in water off Vietnam to detonate. Earth is said to be entering a period of peak activity as part of an eleven-year cycle. It is suggested this potentially could be more violent than the solar cycles of the past three decades. Now that would be something for climate scientists to really worry about…
With respect to the world’s temperature, there are several sources that claim to present the precise figure. One says the 2023 average global temperature was 1.45c above the 1950-90 average. Another says since 1880, Earth’s temperature has increased by 0.08c. Another says during the last 50 years the increase is 0.13c. To the unscientific mind, these temperatures do not appear to be verging on catastrophic boiling us all to death.
As of 2024, data on natural changes in temperature, rainfall, and sea level
do not show any statistically significant difference to historical records.
There are respected scientists who questionthe current climate orthodoxy. Physicist Prof. William Happer of Princeton University and Prof. Richard Lindzen, Earth, Atmospheric and Planetary Sciences at MIT have argued science demonstrates there is no climate-related risk caused by fossil fuels and CO2, and that 600 million years of CO2 and temperature data contradicts the theory that high levels of CO2 will cause catastrophic global warming. They state reliable scientific theories come from validating theoretical predictions with observations, not consensus, peer review, government opinion, or manipulated data.
In July 2023, the International Monetary Fund cancelled a planned talk on climate change by 2022 Nobel physicist John Clauser when they learned he had stated publicly: ‘I can confidently say there is no real climate crisis, and that climate change does not cause extreme weather events. The IPCC is one of the worst sources of dangerous disinformation.’ Clauser pointed out that the US Environmental Protection Authority has charts that show a heatwave Index going back to 1895, showing heatwaves were more common before the 1960s and especially in the 1930s.
In addition to these physicists, there are eminent Australian geologists who challenge the CO2 cause theory. Emeritus Prof. Ian Pilmer of the University of Melbourne, and Prof. Michael Asten of Monash University, have argued that throughout the history of the planet, there have been long periods of major change in climate due to natural forces. This would indicate recent human-based emissions may not be the important factor that we have been led to believe.
With respect to measuring emissions (nitrous oxide and methane), there is an expectation that the Intergovernmental Panel on Climate Change would have collected accurate data. Then one reads an independent 2023 report of these greenhouse gas emissions from farm dams in Australia’s irrigation regions, that the measurements had been massively over-estimated by the IPCC by 4 to 5 per cent.
To add further confusion to the issue, a 2023 research paper submitted to the European Physical Journal Plus claimed climate science has become ‘highly politicised’. Italian scientists analysed long-term data on heat, droughts, floods, hurricanes, tornadoes, and ecosystem productivity, and found no clear trend of extreme events. The statements by these scientists would appear worthy of examination. Unfortunately, comments to the publisher by other climate scientists caused the withdrawal of the article.
If activists are correct, and if temperatures and rainfall start to show a significant increase without any influence from natural factors such as the sun or outer atmospheric disturbances, the second ‘outcome’ mission opens your mind to several strategies that could be compared against each other on cost and effectiveness – renewables, outer space satellites capturing solar energy and transmitting to Earth, small nuclear, carbon capture, examine possibility of amalgamating carbon and turning it into a useful product, lower emission coal-fired power stations, hydro, hydrogen fuel cells, a scientific search for a predator for carbon other than trees (or the planting of more trees), and so on.
A valid client ‘outcome’ statement encourages you not to jump to a conclusion
in the initial stages of critical thinking about the cause of any global warming.
If you make a mistake at that point, there are significant productivity implications. Governments could waste a significant amount of money (a catastrophic amount) on a less than optimum strategy. Rather than relying almost entirely on climate scientists who concentrate on carbon emissions, a politician with a mind focused on validity could bring together an inter-disciplinary team – climate scientists, nuclear physicists, solar physicists, atmospheric physicists, examine the moon’s behaviour, plant technologists, oceanographers, geologists, volcanologists, botanists, bushfire specialists and so on. Has any national government followed this approach? Has any Minister for Energy, in any country, expanded their vision beyond their own narrow ideology is a potential danger to their country…?
There are very obvious reasons why some politicians and many rich investors in renewable energy would oppose a serious questioning of the renewable strategy and switching to nuclear instead. If small nuclear was introduced – as is being done in many countries – it would make current renewable energy strategies redundant. That would mean all the billions of dollars spent on wind and solar would have been a waste of money. We wouldn’t need them. Admitting that would be far too embarrassing for any ideological politician and far too financially damaging to any rich wind farm investor obtaining government grants.
If the Sun is found to be the fundamental cause of the problem (variations in energy output, massive infrequent solar flares, and/or variations in distance between Earth and Sun), or if there is a slight tilting of the Earth on its axis, or the Moon changes position, or even disturbance further out in our solar system, you would evaluate adaptation strategies.
It seemed reasonable for some people to assume the vast flooding in 2022 could be attributed to human-induced climate change. There is however, a different possibility … nature. Environment analyst Graham Lloyd explained.
‘The meteorological processes at play are well understood. Three consecutive La Nina weather patterns have left the eastern seaboard soaked and prone to flooding. Triple La Ninas have happened four times in the Bureau of Meteorology’s 120-year record … The Southern Annular Mode is a climate driver that can influence rainfall and temperature. Although wet, the latest BoM figures show that 2022 was the ninth wettest year on record (not the wettest).’
fWhen the above material, stressing the need to examine the total picture in any critical thinking, was shown to a high school Principal, to a high school science teacher and to an environmental engineer, they were all surprised and quite critical that one would want to show this to students. Annoyed actually. One was emphatic…
‘Why waste the students’ time having them look at irrelevant issues?
We KNOW what the problem is. It is CO2 emissions.
And we KNOW what the solution is. It is 100 per cent renewables.’
My answer to them was:
‘The difference between you and me, is that you want to tell the students WHAT to think. I want to teach them HOW to think. I want them to understand insightful thinking. Not to be indoctrinated’. You can be the judge as to who is on the right track.
Many of my posts include some high quality infographics produced by a colleague, Raymond Inauen. This update is because due to other pressing time demands, Raymond has discontinued the website he set up to host the infographics. Below is an overview to the content, followed by links to the PDF files now hosted at this blog. The infographic PDFs can be downloaded at no charge with no restrictions on use.
World of CO2 Infographics January 2023
This post is to announce that Raymond Inauen of RIC-Communications has a website up for the public to access a series of infographics regarding CO2 and climate science. The Website content is:
The World of CO2
Readers will be aware of previous posts on the four themes to be discovered. Raymond introduces this resource in this way:
WELCO₂ME
Would you like to learn more about CO₂ so you can have informed conversations about climate policy and future energy investments? Or would you rather pass judgment on CO₂ after learning about the basics? Then this is the website for you.
There are 29 infographic images that can be downloaded in four PDF files. Thanks again, Raymond for your interest and efforts to make essential scientific information available to one and all. PDF links are in red.
Roger Palmer speaks quietly, but with the force of knowledge and logic on the subject of global warming/climate change. Two expressions of his perspective are presented here: firstly a brief video and transcript, and secondly excerpts from his 2024 paper. Transcript in italics with my bolds and added images. H/T Raymond Inauen
1. Trust Climate History, Not Hysteria
I’m Roger Palmer, a retired engineer living in Victoria, British Columbia. Today I want to talk about climate change hysteria. The popular press is overflowing with sensational but scary headlines: the hottest day on record, sea levels are rising, climate catastrophe. It’s never been like this before, climate change is an existential threat, we are declaring a climate emergency, it’s man’s fault.
These hysterical messages are reinforced at disruptions organized by career demonstrators and professional protesters.Politicians are falling over themselves to agree with these claims and position themselves as the only viable saviors of mankind who are able to stop the climate from changing. You can’t get elected if you are perceived as being soft on climate change.
The authors of all this spurious noise unfortunately do not have a good understanding of science or the historical paleoclimatic record. These people are so arrogant and self-centered that they believe that man can control the solar system and somehow cancel the naturally occurring climate cycles, so that the earth’s climate stays just the way they want it.
Let’s start the discussion by outlining a difference between weather and climate. When a person speaks about weather they are referring to how the atmosphere is behaving over the short term hours or days and usually over a small area. The term climate refers to the statistics of weather over a defined large region over a long period of time, decades or more. the atmospheric characteristics being described include temperature, winds, moisture, clouds and precipitation.
But it is the temperature that most people seem to focus on. In the 1970s the concern was about global cooling, but it has now shifted to global warming. An example of a weather statement is: “It will be cooler and windy in downtown Ottawa tomorrow.” An example of a climate statement is: “North America will be warmer over the next two decades.”
Reliable equipment for measuring temperature has been available since the early 1800s, but unfortunately the number and placement of temperature recording stations has changed considerably over time. So it is often difficult to get a complete and consistent record for a specific area temperature history. The period preceding the 19th century must be inferred by analyzing ice cores, tree growth rings, sediments and corals. Ice cores typically from Greenland, Antarctica or the Arctic are the most commonly used proxies. And it is possible to infer temperatures from thousands or millions of years ago. It is also possible to use ice cores to estimate the historical composition of the atmosphere.
Although surface temperature is what humans actually feel on a day-to-day basis, that data can be contaminated by urban heat islands. So it is sometimes more meaningful to talk about the temperature of the troposphere, which is the lowest layer of the earth’s atmosphere about 20 kilometers thick and is where all the weather takes place; the clouds, precipitation, storms, winds etc. Temperatures in the troposphere can be directly measured by balloon-borne radiosondes or inferred from satellite radiometry.
Geological records show that the earth’s average temperature has varied cyclically for many millions of years. Sometimes it has been much hotter than today and sometimes much cooler. This graph estimates variations in temperature during the last 500 million years. The earth is approximately four and a half billion years old; predecessors of man have been on earth for about two and a half million years; and modern homo sapiens have been around for about two hundred thousand years.
Here is what the earth’s temperature has been doing over the past five hundred thousand years and here is the temperature record for more recent times; the last 11, 000 years otherwise known as the Holocene era.
The earth would be a much cooler place if it did not have an atmosphere. The atmosphere contains a number of gases that warm the earth by what is called the greenhouse effect. Which is when solar radiation from the sun can easily pass through the gases to the earth, but outgoing infrared radiation from the earth’s surface is partially blocked from radiating off into space by these same gases. Further details of this mechanism are given in the references.
There are several different greenhouse gases but everyone seems to focus on just one of them: carbon dioxide known as CO2. The concentration of carbon dioxide in the atmosphere is sometimes thought to be the driver of the earth’s temperature, but the geological record shows that there has been no correlation.
The absolutely dominant greenhouse gas is water vapor. The earth’s glaciers and ice caps have grown and shrunk cyclically over time. The earth recently exited the Little Ice Age and is currently warming just as in previous cycles. There is definitely a new ice age coming, but none of us will live to experience it. We are currently in an interglacial, which is a period between ice ages.
As shown by the earlier graphs the earth’s climate is not being driven by changes in the co2 level. Indeed changes in the atmospheric CO2 concentration are probably a result of changes in the earth’s temperature as oceans and land masses release stored CO2 resulting from long-term temperature changes. As the glaciers and ice caps cyclically build and recede, there are corresponding changes in the sea level. The sea level has cyclically varied from today’s levels by as much as plus or minus 200 meters. And these fluctuations are expected to continue for thousands of years to come.
So what is causing these long-term cyclical changes in the earth’s average temperature? A recently posted youtube series entitled Paleoclimatology parts one through three gives an in-depth analysis of the factors at work. Here is a summary of just some of the main factors:
♦ Continental drifts as result of plate tectonics has caused very long-term climate changes as the ocean’s heat carrying currents have been forced to take different paths;
♦ Milankovitch cycles due to changes in the earth’s tilt, precession and orbital eccentricity and cyclical changes in the solar system’s orbital alignments have demonstrably produced corresponding changes in the earth’s climate over both the long term and the short term;
♦ Cyclical changes in the sun’s total output radiated power. cyclical changes in the sun’s output spectral distribution especially the ultraviolet component
♦ Variations in the earth’s magnetic field resulting in changes in the magnitude and position of the earth’s magnetosphere which shields us from incoming cosmic particles and the solar wind
♦ Variations in upper level bacteria which serve as nucleation sites for clouds and precipitation
♦ Changes in the earth’s average cloud cover as a result of changes in many of the factors just mentioned
♦ Changes in the earth’s upper atmospheric wind currents that are used to distribute heat energy throughout the pallet of the planet
Note that carbon dioxide concentration is not a significant cause of these natural cyclical changes. CO2 has some effect on long-term climate changes but it is not the dominant determinant of global temperature. Then why are the agitators and politicians so obsessed with this and why are they arbitrarily blaming man-made CO2 emissions from the combustion of fossil fuels as threatening disruptions to their climate nirvana?
Perhaps there’s a hidden agenda. Current proposals to decarbonize the earth by eliminating fossil fuels will have a minor effect on climate, but will cause extraordinary economic harm. Maybe the true goal of the protesters is to destroy capitalism in the western world.
CO2 is a clear odorless gas. Atmospheric CO2 levels have been much higher in the past and were sometimes much lower. CO2 is not a pollutant–it is essential to life. If the atmospheric CO2 concentration were to drop below 150 parts per million, the earth’s vegetation would not be able to survive and the earth would become a barren wasteland. There have been proposals to use large-scale geoengineering to alter the earth’s climate, such as by surrounding the earth with orbiting reflective particles or mirrors. But such schemes are fraught with political as well as technical dangers.
The Intergovernmental Panel on Climate Change known as the IPCC is often identified as the final authority when it comes to questions about the earth’s climate. However the IPCC does not conduct research; it merely reviews papers in the field. And the IPCC should not be considered as unbiased. Because when they were created by the United Nations they were specifically charged to investigate how mankind is causing the earth’s climate to change.
In other words the conclusion had already been reached that man was to blame before any investigations were performed. The IPCC is a political animal; nothing is published before it has been approved by the representatives of all the participating countries to make sure that it aligns with their governments’ objectives and policies. IPCC has published numerous forecasts of ever increasing global temperatures being driven by rising atmospheric CO2 concentrations. But these are based on incomplete and inaccurate computer models and they have all drastically overestimated the forthcoming temperature rise.
These computer models ignore or inadequately account for many factors, including clouds and solar variations. It is claimed that 97 % of scientists agree that man-made emissions of CO2 are having significant negative effects on the earth’s climate. However consensus is not a valid way to conduct scientific research. Group think is a major problem in this field. Remember Galileo was able to prove that the earth orbited the sun rather than the other way around. But public opinion and the church forced him to recant his findings. Consensus overruled scientific evidence just like it appears to be doing today.
The earth is getting warmer and it will continue to do sountil the temperature trend reverses sometime in the future and we head into the next ice age. Mankind needs to recognize that we are an observer of naturally occurring climate cycles. There is very little that we can do to stop, change or influence these cycles. The best thing that man can do is learn to adapt to these natural cycles. Stop wasting our money and damaging our economy on futile and inefficient schemes to reduce man’s CO2 emissions, appearing to be trying to thwart what are perfectly natural cyclical changes of the earth’s climate.
Learn to live with these changes. Mankind has to adapt. Have a nice day and enjoy the warmth while we have it. Here are links to references providing more details on many of these points
As mentioned above, many governments have decided to pursue the goal of becoming “Net Zero” by 2050 (or possibly later). This means that they want all CO2 emitted by man’s activities either to be eliminated or somehow compensated for by 2050 in the belief that this will slow the current rise in global temperatures, and limit the rise to 1.5°C above pre-industrial levels.
As discussed in previous sections, CO2 concentration is not the primary driver of global temperature, and indeed, rising CO2 levels might actually be a result of warming due to entirely natural factors. Despite the dubious scientific justification, politicians and special-interest groups have embraced the “Net Zero” battle cry, and are falling over themselves with announcements, proclamations, and protests as they attempt to destroy the world’s economy.
The concept of Net Zero is that any continuing emissions of CO2 need to be “offset” by actions to remove the same amount of CO2 from the atmosphere. These “offsets” could be the planting of trees that absorb CO2, or they could involve operating actual equipment that removes CO2 from the atmosphere, and then sequesters it in a safe storage facility (this is called CCS, which stands for Carbon Capture and Sequestration). A marketplace has now developed whereby “carbon credits” are bought and sold, and some rather flimsy schemes have been created.
As an example of how ludicrous this churning process is, consider the example of the DRAX power plant that is located in the U.K. This power plant was built in 1974, and burned coal to generate electricity (in a conventional steam turbine system). Starting in 2013, this power plant was converted to burn compressed wood pellets. The pellets are manufactured in Canada, and shipped to the UK from the port of Prince Rupert, BC. The pellets were originally supposed to use scrap wood left over from existing logging operations, but demand eventually required that trees be specifically grown to feed the process. It was claimed that the entire process (growing trees, converting the wood to pellets, transporting them between continents, and then burning them in a thermal power plant) was “sustainable”, because new trees were planted to replace those that were cut down!
Direct Carbon Capture(DCC)
There are several companies developing technology and equipment for actually extracting (“capturing”) CO2 from the air. The CO2 is then stored (“sequestered”) either as a gas, or converted to some other form. The justification for doing this is that governments and agencies mistakenly believe that CO2 emissions from human activities is causing the world to warm, and that not only must these emissions stop, but some of the CO2 must be removed in order to lower the concentration in the atmosphere, thereby supposedly preventing future temperature rises.
The processes used for DCC are complex, and require large amounts of energy to operate. It is claimed that the energy will come from “sustainable” sources (hydro, solar, wind, nuclear), so the whole process will help a country reach the goal of “net zero”. Funding for these projects effectively comes from selling “carbon credits”, because governments have inadvisably placed a dollar value on CO2. If these proposed projects go ahead, the scale and costs involved will be enormous. And remember, lowering the CO2 concentration in the atmosphere by 1 ppm will only potentially reduce the temperature by between 9 and 15 thousandths of a degree C!
Energy and Transortation
As part of the charge toward the Holy Grail of “Net Zero”, the entire transportation infrastructure is being forced to dispense with the burning of fossil fuels. Governments apply so-called “Carbon Taxes” on the sale of hydrocarbon fuels, and the tax rates are methodically being increased as time goes by, in an effort to get users to switch to another type of energy.
Oil has been a major energy source for over two centuries. It has a high energy density (ie: a small and light weight amount of the substance has the potential to create a large amount of energy). A few decades ago, there was worldwide concern that we were running out of these fuels and only had a limited supply, but new exploration/extraction techniques, combined with more efficient energy use have allayed those concerns.
Fossil fuels are converted to energy by the process of combustion. Almost 40% of the material’s potential energy is extracted in modern gasoline or diesel engines, and almost 55% in modern combined-cycle gas-fired power plants. The remaining energy is turned into waste heat. In building heating applications, the fossil fuel is burned to directly create heat: this process can have efficiencies of over 95%. All of these combustion processes generate CO2, and this is the main focus of politicians, scientists, and environmentalists, despite evidence (as outlined earlier) that climate change is not being primarily driven by increases in CO2 concentration.
Wind turbines and solar cells have received most of the publicity in recent years as large arrays of these devices have been installed around the world. The biggest problem is the intermittent nature of their output. To compensate for this, excess generating capacity has to be installed, and very large energy storage devices (batteries, pumped water, etc) have to be included to ensure a reliable source of supply. If electricity is produced by techniques (such as hydro, solar, wind, or nuclear) that do not emit any greenhouse gases, there is strong political motivation to convert existing consumers of fossil fuels to use electricity as their energy source. Transportation has been a major user of fossil fuels, and the sector is highly visible to the public, so there is considerable pressure to electrify it.
Fossil fuels are an ideal way to power mobile devices (especially road vehicles, aircraft, and ships): the energy density (KW-h per Kg) is very high, and it is easy to quickly refuel as required. There has been much development in electrical technology for road vehicles, but the major problem has been the availability of electrical energy storage devices (primarily batteries) that are small and light enough to fit into the vehicle, and that have sufficient capacity to provide decent range between charges. The energy density (KW-h per Kg) of modern Li-ion batteries is about 2% that of gasoline or diesel fuel. Some electric cars have met with market success, but battery technology needs to develop a major increase in battery energy density before they are considered viable for mainstream applications, and then the problem will be one of installing enough charging infrastructure to allow for unimpeded travel without the drivers suffering from “range anxiety”.
Ships, highway trucks and airliners pose their own problems, and are unlikely to be weaned off of fossil fuels for some time to come. These applications need energy storage devices that have much higher density (both by volume and by weight) than batteries – the use of hydrogen (produced by electrolysis of water) and fuel cells is being vigorously pursued. Hydrogen can also be burned directly in modified jet engines or even reciprocating engines, but hydrogen has storage issues that need to be addressed.
Hydrogen’s energy density (KW-h per Kg) is quite high, but it occupies a large volume, so must be stored at very high pressures if storage tanks are to be kept to a reasonable size. Hydrogen can also be stored in a liquid form, but the extremely low cryogenic temperatures required (-253°C) present significant challenges.
If it were possible to convert all power generation, heating, and transportation applications to non fossil fuel technology, it would be possible to reduce the total amount of man-made CO2 emissions by over 50%, but this would have a negligible effect on global temperature. It would of course still be required to extract oil and natural gas from the ground for the manufacture of synthetic materials, plastics, asphalt, lubricants, and pharmaceuticals.
Summary and Conclusions
The material reviewed so far in this paper confirms that there are a large number of factors that affect the earth’s climate. Many of these are poorly understood by man, and there are some factors that probably haven’t even been discovered yet. A number of conclusions can be taken away from the information presented so far in this document:
a) Climate change is a naturally-occurring, cyclic phenomena, and it has been going on for millions of years. b) Climate change is primarily driven by changes in the energy of the sun that impinges on the earth. The dominant factors driving this are variations in the sun (total output power, spectral distribution, sunspot cycles) Milankovitch Cycles, variations in ocean currents (ENSO, PDO, and AMO). Other factors include the effect of varying cosmic particle influx and high altitude bacteria, causing changes in cloud cover. c) The primary greenhouse gas is water vapour. The effect of atmospheric CO2 on global temperature change is much less. Because of the non-linear effect of CO2 concentration, increases beyond the current level will have a decreasing effect on the earth’s climate. d) Man-made CO2 does have a minor effect on global temperature changes, but it is not the dominant factor. A reduction of man-made CO2 emissions would have a negligible effect on global temperature. e) Man’s understanding of the various climate-influencing factors is very limited. f) Climate models are not effective at forecasting future long-term global temperatures. g) There is very little that mankind can do to affect global temperature change. It does not make sense to introduce regulations that will have a negative impact on Western economies in a pointless attempt to change the natural rate of global climate change. h) Mankind will have to learn to adapt to future climate changes. If mankind is still around in a few thousand years, they will then have to adapt to global cooling and glaciations!
Any legislative efforts to limit man-made carbon dioxide emissions at the local, regional, provincial, or federal levels may be well-intended, but are ultimately futile, and potentially dangerous. These efforts will harm the economy, waste resources, and not significantly affect the naturally-occurring cyclic climatic changes.
fWhen the above material, stressing the need to examine the total picture in any critical thinking, was shown to a high school Principal, to a high school science teacher and to an environmental engineer, they were all surprised and quite critical that one would want to show this to students. Annoyed actually. One was emphatic…
Science Matters 