The post below updates the UAH record of air temperatures over land and ocean. Each month and year exposes again the growing disconnect between the real world and the Zero Carbon zealots. It is as though the anti-hydrocarbon band wagon hopes to drown out the data contradicting their justification for the Great Energy Transition. Yes, there was warming from an El Nino buildup coincidental with North Atlantic warming, but no basis to blame it on CO2.
As an overview consider how recent rapid cooling completely overcame the warming from the last 3 El Ninos (1998, 2010 and 2016). The UAH record shows that the effects of the last one were gone as of April 2021, again in November 2021, and in February and June 2022 At year end 2022 and continuing into 2023 global temp anomaly matched or went lower than average since 1995, an ENSO neutral year. (UAH baseline is now 1991-2020). Then there was an usual El Nino warming spike of uncertain cause, unrelated to steadily rising CO2, and now dropping steadily back toward normal values.
For reference I added an overlay of CO2 annual concentrations as measured at Mauna Loa. While temperatures fluctuated up and down ending flat, CO2 went up steadily by ~66 ppm, an 18% increase.
Furthermore, going back to previous warmings prior to the satellite record shows that the entire rise of 0.8C since 1947 is due to oceanic, not human activity.
The animation is an update of a previous analysis from Dr. Murry Salby. These graphs use Hadcrut4 and include the 2016 El Nino warming event. The exhibit shows since 1947 GMT warmed by 0.8 C, from 13.9 to 14.7, as estimated by Hadcrut4. This resulted from three natural warming events involving ocean cycles. The most recent rise 2013-16 lifted temperatures by 0.2C. Previously the 1997-98 El Nino produced a plateau increase of 0.4C. Before that, a rise from 1977-81 added 0.2C to start the warming since 1947.
Importantly, the theory of human-caused global warming asserts that increasing CO2 in the atmosphere changes the baseline and causes systemic warming in our climate. On the contrary, all of the warming since 1947 was episodic, coming from three brief events associated with oceanic cycles. And in 2024 we saw an amazing episode with a temperature spike driven by ocean air warming in all regions, along with rising NH land temperatures, now dropping well below its peak.
Chris Schoeneveld has produced a similar graph to the animation above, with a temperature series combining HadCRUT4 and UAH6. H/T WUWT
April 2026 UAH Temps: Land Cools More Than Ocean Warms
With apologies to Paul Revere, this post is on the lookout for cooler weather with an eye on both the Land and the Sea. While you heard a lot about 2020-21 temperatures matching 2016 as the highest ever, that spin ignores how fast the cooling set in. The UAH data analyzed below shows that warming from the last El Nino had fully dissipated with chilly temperatures in all regions. After a warming blip in 2022, land and ocean temps dropped again with 2023 starting below the mean since 1995. Spring and Summer 2023 saw a series of warmings, continuing into 2024 peaking in April, then cooling off to the present.
UAH has updated their TLT (temperatures in lower troposphere) dataset for April 2026. Due to one satellite drifting more than can be corrected, the dataset has been recalibrated and retitled as version 6.1 Graphs here contain this updated 6.1 data. Posts on their reading of ocean air temps this month are ahead the update from HadSST4. I posted recently on March 2026 Mild Warming SSTs Continue.These posts have a separate graph of land air temps because the comparisons and contrasts are interesting as we contemplate possible cooling in coming months and years.
Sometimes air temps over land diverge from ocean air changes. 2025 showed a sharp contrast between land and sea, first with ocean air temps falling in January recovering in February. Then in November and December SH land temps spiked while ocean temps showed litle change. In February 2026 NH land temps doubled, from Dec. 0.53C up to 1.14C last month. Despite SH land changing little, and Tropical land cooling, the Global land anomaly jumped up from 0.53 to 0.93C. That reversed in March with both NH land and Global land anomaly back down to 0.63C. That cooling offset SH Ocean warming doubling from 0.19C to 0.38C. Now in April NH land has cooled further down to 0.51C while NH ocean warmed slightly. SH air temps went oppositely: SH land wamed slightly while SH ocean dropped from 0.38C to 0.27C. Note that in the first 4 months of 2026 the Global land and ocean air temps have hardly varied from 0.38C.
Note: UAH has shifted their baseline from 1981-2010 to 1991-2020 beginning with January 2021. v6.1 data was recalibrated also starting with 2021. In the charts below, the trends and fluctuations remain the same but the anomaly values changed with the baseline reference shift.
Presently sea surface temperatures (SST) are the best available indicator of heat content gained or lost from earth’s climate system. Enthalpy is the thermodynamic term for total heat content in a system, and humidity differences in air parcels affect enthalpy. Measuring water temperature directly avoids distorted impressions from air measurements. In addition, ocean covers 71% of the planet surface and thus dominates surface temperature estimates. Eventually we will likely have reliable means of recording water temperatures at depth.
Recently, Dr. Ole Humlum reported from his research that air temperatures lag 2-3 months behind changes in SST. Thus cooling oceans portend cooling land air temperatures to follow. He also observed that changes in CO2 atmospheric concentrations lag behind SST by 11-12 months. This latter point is addressed in a previous post Who to Blame for Rising CO2?
After a change in priorities, updates are now exclusive to HadSST4. For comparison we can also look at lower troposphere temperatures (TLT) from UAHv6.1 which are now posted for April 2026. The temperature record is derived from microwave sounding units (MSU) on board satellites like the one pictured above. Recently there was a change in UAH processing of satellite drift corrections, including dropping one platform which can no longer be corrected. The graphs below are taken from the revised and current dataset.
The UAH dataset includes temperature results for air above the oceans, and thus should be most comparable to the SSTs. There is the additional feature that ocean air temps avoid Urban Heat Islands (UHI). The graph below shows monthly anomalies for ocean air temps since January 2015.
After sharp cooling everywhere in January 2023, there was a remarkable spiking of Tropical ocean temps from -0.5C up to + 1.2C in January 2024. The rise was matched by other regions in 2024, such that the Global anomaly peaked at 0.86C in April. Since then all regions have cooled down sharply to a low of 0.27C in January. In February 2025, SH rose from 0.1C to 0.4C pulling the Global ocean air anomaly up to 0.47C, where it stayed in March and April. In May drops in NH and Tropics pulled the air temps over oceans down despite an uptick in SH. At 0.43C, ocean air temps were similar to May 2020, albeit with higher SH anomalies. In November/December all regions were cooler, led by a sharp drop in SH bringing the Global ocean anomaly down to 0.02C. In 2026, ocean warming is evident, but now SH cooling offset NH and Tropical warming.
Land Air Temperatures Tracking in Seesaw Pattern
We sometimes overlook that in climate temperature records, while the oceans are measured directly with SSTs, land temps are measured only indirectly. The land temperature records at surface stations sample air temps at 2 meters above ground. UAH gives tlt anomalies for air over land separately from ocean air temps. The graph updated for March is below.
Here we have fresh evidence of the greater volatility of the Land temperatures, along with extraordinary departures by SH land. The seesaw pattern in Land temps is similar to ocean temps 2021-22, except that SH is the outlier, hitting bottom in January 2023. Then exceptionally SH goes from -0.6C up to 1.4C in September 2023 and 1.8C in August 2024, with a large drop in between. In November, SH and the Tropics pulled the Global Land anomaly further down despite a bump in NH land temps. February showed a sharp drop in NH land air temps from 1.07C down to 0.56C, pulling the Global land anomaly downward from 0.9C to 0.6C. Some ups and downs followed with returns close to February values in August. A remarkable spike in October was completely reversed in November/December, along with NH dropping sharply bringing the Global Land anomaly down to 0.52C, half of its peak value of 1.17C 09/2024. In 2026 January and February Global land rebounded up to 1.14C, led by a NH warming spike. That NH spike was reversed in March and April back down to 0.43C and the Global land anomaly pulled back down despits some SH and Tropical land warming.
The Bigger Picture UAH Global Since 1980
The chart shows monthly Global Land and Ocean anomalies starting 01/1980 to present. The average monthly anomaly is -0.02 for this period of more than four decades. The graph shows the 1998 El Nino after which the mean resumed, and again after the smaller 2010 event. The 2016 El Nino matched 1998 peak and in addition NH after effects lasted longer, followed by the NH warming 2019-20. An upward bump in 2021 was reversed with temps having returned close to the mean as of 2/2022. March and April brought warmer Global temps, later reversed
With the sharp drops in Nov., Dec. and January 2023 temps, there was no increase over 1980. Then in 2023 the buildup to the October/November peak exceeded the sharp April peak of the El Nino 1998 event. It also surpassed the February peak in 2016. In 2024 March and April took the Global anomaly to a new peak of 0.94C. The cool down started with May dropping to 0.9C, later months declined steadily until August Global Land and Ocean was down to 0.39C. then rose slightly to 0.53 in October, before dropping to 0.3C in December, and slightly higher since, now at 0.39C in 2026.
The graph reminds of another chart showing the abrupt ejection of humid air from Hunga Tonga eruption.
TLTs include mixing above the oceans and probably some influence from nearby more volatile land temps. Clearly NH and Global land temps have been dropping in a seesaw pattern, nearly 1C lower than the 2016 peak. Since the ocean has 1000 times the heat capacity as the atmosphere, that cooling is a significant driving force. TLT measures started the recent cooling later than SSTs from HadSST4, but are now showing the same pattern. Despite the three El Ninos, their warming had not persisted prior to 2023, and without them it would probably have cooled since 1995. Of course, the future has not yet been written.
Many of my posts include some high quality infographics produced by a colleague, Raymond Inauen of RIC-Communications. In 2024 because of other pressing time demands, Raymond discontinued the website he set up to host the infographics. This post is to announce that he has now reactivated the 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.
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.
At that website the high resolution infographic PDFs can be downloaded at no charge with no restrictions on use. There are also informative videos and FAQ pages, as well as links to contact with questions, comments or additional suggestions. There is also a link to support this work if you are so inclined.
Milloy reads AI bias/climate riot act to IBM management at annual shareholder meeting. Here is the media release and audio presentation for the IBM shareholder proposal of the Free Enterprise Project of the National Center for Public Policy Research. The annual shareholder meeting is April 28, 2026. Text of press release below with my bolds and added images.
Press Release: IBM’s AI Model: Garbage In, Garbage Out
Washington, D.C. – At next week’s IBM annual meeting, shareholders will vote on a proposal from the National Center for Public Policy Research’s Free Enterprise Project (FEP) tackling potential bias within the company’s artificial intelligence models.
Proposal 7 (“AI Bias Audit”) requests “a report, within the next year, on the methods used to eliminate bias from the Company’s artificial intelligence (AI) models.”
At the April 28 meeting, FEP Executive Director Steve Milloy will cite climate alarmism as an example of where AI too often gets it wrong:
I am an AI user and it can be a great tool. But AI is subject to what 1950s IBM programmer George Fuechsel called “GIGO” – garbage in, garbage out. The Internet is full of amazing information. It is also full of amazing garbage. AI models often cannot distinguish between the two.
An example of garbage-in, garbage-out AI occurs in the controversial area of global warming and climate change. Here are three hardcore facts about climate:
♦ It cannot be scientifically demonstrated that greenhouse gas emissions have had
any effect on global climate.
♦ Emissions-driven climate models do not work.
♦ No emissions-based apocalyptic climate prediction has ever come true.
Despite these realities, if you query IBM AI on climate, you will get back gloom-and-doom climate hoax dogma. This happens because the Internet has been loaded for decades with bogus climate hoax claims and assumptions that are erroneous garbage.
Milloy believes IBM’s own website is partly to blame for this misinformation:
On IBM’s website, IBM’s chief sustainability officer says, for example, that:
Global warming is “leading to increased flooding, causing heat stroke and destroying farms and livelihoods. Insurance is becoming unaffordable.”
None of that is true. But it is what IBM AI is programmed with. Even IBM staff has been polluted with the climate. It is precisely the sort of garbage that George Fueschsel warned about.
The mindless parroting of climate hoax garbage to governments, businesses and the public has had devastating economic and societal impacts around the world – from wars to inflation to deadly energy failures to energy rationing to crop failures to deindustrialization to lost jobs to wasted taxpayer money to traumatized school children and beyond.
It has been estimated that world has wasted $10 trillion chasing the climate hoax narrative since 2015 alone. The list of harms from the climate hoax is endless. Yet IBM AI has learned the hoax and spreads the climate garbage on to users. Milloy will say:
“While IBM may be great at the computing part of AI, the world actually functions on realities that are often lost in the Internet dumpster,” “Management needs to be much more humble about all this. It needs to take the bias problem seriously. Touchy-feely videos on the IBM website just don’t cut it.”
IBM shareholders can support Proposal 7 by voting their proxies before Tuesday’s meeting.
The best context for understanding decadal temperature changes comes from the world’s sea surface temperatures (SST), for several reasons:
The ocean covers 71% of the globe and drives average temperatures;
SSTs have a constant water content, (unlike air temperatures), so give a better reading of heat content variations;
A major El Nino was the dominant climate feature in recent years.
Previously I used HadSST3 for these reports, but Hadley Centre has made HadSST4 the priority, and v.3 will no longer be updated. This February report is based on HadSST 4, but with a twist. The data is slightly different in the new version, 4.2.0.0 replacing 4.1.1.0. Product page is here.
The Current Context
The chart below shows SST monthly anomalies as reported in HadSST 4.2 starting in 2015 through February 2026. A global cooling pattern is seen clearly in the Tropics since its peak in 2016, joined by NH and SH cycling downward since 2016, followed by rising temperatures in 2023 and 2024 and cooling in 2025, now with a mild rising in 2026.
Note that in 2015-2016 the Tropics and SH peaked in between two summer NH spikes. That pattern repeated in 2019-2020 with a lesser Tropics peak and SH bump, but with higher NH spikes. By end of 2020, cooler SSTs in all regions took the Global anomaly well below the mean for this period. A small warming was driven by NH summer peaks in 2021-22, but offset by cooling in SH and the tropics, By January 2023 the global anomaly was again below the mean.
Then in 2023-24 came an event resembling 2015-16 with a Tropical spike and two NH spikes alongside, all higher than 2015-16. There was also a coinciding rise in SH, and the Global anomaly was pulled up to 1.1°C in 2023, ~0.3° higher than the 2015 peak. Then NH started down autumn 2023, followed by Tropics and SH descending 2024 to the present. During 2 years of cooling in SH and the Tropics, the Global anomaly came back down, led by Tropics cooling from its 1.3°C peak 2024/01, down to 0.6C in September this year. Note the smaller peak in NH in July 2025 now declining along with SH and the Global anomaly cooler as well. In December the Global anomaly exactly matched the mean for this period, with all regions converging on that value, led by a 6 month drop in NH. Now in 2026 the first 3 months show a mild warming in all regions, in March approximately matching values 3 years ago, 03/2023 before the warming spike.
Comment:
The climatists have seized on this unusual warming as proof their Zero Carbon agenda is needed, without addressing how impossible it would be for CO2 warming the air to raise ocean temperatures. It is the ocean that warms the air, not the other way around. Recently Steven Koonin had this to say about the phonomenon confirmed in the graph above:
El Nino is a phenomenon in the climate system that happens once every four or five years. Heat builds up in the equatorial Pacific to the west of Indonesia and so on. Then when enough of it builds up it surges across the Pacific and changes the currents and the winds. As it surges toward South America it was discovered and named in the 19th century It iswell understood at this point that the phenomenon has nothing to do with CO2.
Now people talk about changes in that phenomena as a result of CO2 but it’s there in the climate system already and when it happens it influences weather all over the world. We feel it when it gets rainier in Southern California for example. So for the last 3 years we have been in the opposite of an El Nino, a La Nina, part of the reason people think the West Coast has been in drought.
It has now shifted in the last months to an El Nino condition that warms the globe and is thought to contribute to this Spike we have seen. But there are other contributions as well. One of the most surprising ones is that back in January of 2022 an enormous underwater volcano went off in Tonga and it put up a lot of water vapor into the upper atmosphere. It increased the upper atmosphere of water vapor by about 10 percent, and that’s a warming effect, and it may be that is contributing to why the spike is so high.
A longer view of SSTs
To enlarge, open image in new tab.
The graph above is noisy, but the density is needed to see the seasonal patterns in the oceanic fluctuations. Previous posts focused on the rise and fall of the last El Nino starting in 2015. This post adds a longer view, encompassing the significant 1998 El Nino and since. The color schemes are retained for Global, Tropics, NH and SH anomalies. Despite the longer time frame, I have kept the monthly data (rather than yearly averages) because of interesting shifts between January and July. 1995 is a reasonable (ENSO neutral) starting point prior to the first El Nino.
The sharp Tropical rise peaking in 1998 was dominant in the record, starting Jan. ’97 to pull up SSTs uniformly before returning to the same level Jan. ’99. There were strong cool periods before and after the 1998 El Nino event. Then SSTs in all regions returned to the mean in 2001-2.
SSTS fluctuate around the mean until 2007, when another, smaller ENSO event occurs. There is cooling 2007-8, a lower peak warming in 2009-10, following by cooling in 2011-12. Again SSTs are average 2013-14.
Now a different pattern appears. The Tropics cooled sharply to Jan 11, then rise steadily for 4 years to Jan 15, at which point the most recent major El Nino takes off. But this time in contrast to ’97-’99, the Northern Hemisphere produces peaks every summer pulling up the Global average. In fact, these NH peaks appear every July starting in 2003, growing stronger to produce 3 massive highs in 2014, 15 and 16. NH July 2017 was only slightly lower, and a fifth NH peak still lower in Sept. 2018.
The highest summer NH peaks came in 2019 and 2020, only this time the Tropics and SH were offsetting rather adding to the warming. (Note: these are high anomalies on top of the highest absolute temps in the NH.) Since 2014 SH has played a moderating role, offsetting the NH warming pulses. After September 2020 temps dropped off down until February 2021. In 2021-22 there were again summer NH spikes, but in 2022 moderated first by cooling Tropics and SH SSTs, then in October to January 2023 by deeper cooling in NH and Tropics.
Then in 2023 the Tropics flipped from below to well above average, while NH produced a summer peak extending into September higher than any previous year. Despite El Nino driving the Tropics January 2024 anomaly higher than 1998 and 2016 peaks, following months cooled in all regions, and the Tropics continued cooling in April, May and June along with SH dropping. After July and August NH warming again pulled the global anomaly higher, September through January 2025 resumed cooling in all regions, continuing February through April 2025, with little change in May,June and July despite upward bumps in NH. Now temps in all regions have cooled led by NH from August through December 2025. A mild warming in 2026 appears in all regions January through March.
What to make of all this? The patterns suggest that in addition to El Ninos in the Pacific driving the Tropic SSTs, something else is going on in the NH. The obvious culprit is the North Atlantic, since I have seen this sort of pulsing before. After reading some papers by David Dilley, I confirmed his observation of Atlantic pulses into the Arctic every 8 to 10 years.
Contemporary AMO Observations
Through January 2023 I depended on the Kaplan AMO Index (not smoothed, not detrended) for N. Atlantic observations. But it is no longer being updated, and NOAA says they don’t know its future. So I find that ERSSTv5 AMO dataset has current data. It differs from Kaplan, which reported average absolute temps measured in N. Atlantic. “ERSST5 AMO follows Trenberth and Shea (2006) proposal to use the NA region EQ-60°N, 0°-80°W and subtract the global rise of SST 60°S-60°N to obtain a measure of the internal variability, arguing that the effect of external forcing on the North Atlantic should be similar to the effect on the other oceans.” So the values represent SST anomaly differences between the N. Atlantic and the Global ocean.
The chart above confirms what Kaplan also showed. As August is the hottest month for the N. Atlantic, its variability, high and low, drives the annual results for this basin. Note also the peaks in 2010, lows after 2014, and a rise in 2021. Then in 2023 the peak reached 1.4C before declining to 0.9 August 2026. An annual chart below is informative:
Note the difference between blue/green years, beige/brown, and purple/red years. 2010, 2021, 2022 all peaked strongly in August or September. 1998 and 2007 were mildly warm. 2016 and 2018 were matching or cooler than the global average. 2023 started out slightly warm, then rose steadily to an extraordinary peak in July. August to October were only slightly lower, but by December cooled by ~0.4C.
Then in 2024 the AMO anomaly started higher than any previous year, then leveled off for two months declining slightly into April. Remarkably, May showed an upward leap putting this on a higher track than 2023, and rising slightly higher in June. In July, August and September 2024 the anomaly declined, and despite a small rise in October, ended close to where it began. Note 2025 started much lower than the previous year and headed sharply downward, well below the previous two years, then since April through September aligning with 2010. In October there was an unusual upward spike, now reversed down to match 2022 and 2016. The orange 2026 line continues downward and is visible on top of 2016 purple line, well below the peak years of 2023 and 2024.
The pattern suggests the ocean may be demonstrating a stairstep pattern like that we have also seen in HadCRUT4.
The rose line is the average anomaly 1982-1996 inclusive, value 0.18. The orange line the average 1982-2025, value 0.41 also for the period 1997-2012. The red line is 2015-2025, value 0.74. As noted above, these rising stages are driven by the combined warming in the Tropics and NH, including both Pacific and Atlantic basins.
The oceans are driving the warming this century. SSTs took a step up with the 1998 El Nino and have stayed there with help from the North Atlantic, and more recently the Pacific northern “Blob.” The ocean surfaces are releasing a lot of energy, warming the air, but eventually will have a cooling effect. The decline after 1937 was rapid by comparison, so one wonders: How long can the oceans keep this up? And is the sun adding forcing to this process?
USS Pearl Harbor deploys Global Drifter Buoys in Pacific Ocean
A comprehensive new study extending the U.S. Historical Climatology Network (USHCN) record back to 1899 finds that both hot and cold temperature extremes across the contiguous United States have declined over the past 127 years. The research, performed by Dr. John R. Christy, Alabama State Climatologist (retired) and professor of atmospheric and Earth science at The University of Alabama in Huntsville, analyzed more than 40 million daily temperature observations to provide the most complete long-term view to date of U.S. extreme heat and cold. The paper is published in Theoretical and Applied Climatology. Excerpts below with my bolds and some added images.
Abstract
Knowledge of temperature extremes, and their potential changes within a climate system of increasing greenhouse gases, is of vital interest for humans and the infrastructure which supports them. To produce a better understanding of how daily extreme temperatures have changed over time in the conterminous US (CONUS), the United States Historical Climate Network (USHCN) database was extended back to 1899 and forward to 2025. The original 1,218 stations, selected in the 1980s by NOAA as capable of addressing climate concerns, have since been neglected – almost half of the stations have closed since 2000. Incomplete station records were supplemented with nearby stations with high correlation and removeable biases to provide time series for 1,211 of the stations with at least 92% of data present. Extreme temperature metrics for summer daily maximum temperatures and winter daily minimum temperatures were calculated. The general result is that metrics for extreme summer heat, e.g., hottest values, number of heatwave days, etc., show modest negative trends since 1899. Extreme cold temperature metrics also indicate a decline in their occurrences especially since the 1990s. In sum, instances of both hot and cold extreme metrics have declined since 1899. To demonstrate an application of this dataset we examined the claims of one source regarding changing temperature extremes, The National Climate Assessment 5.
This metric determines for each day of the season the particular year in which the hottest (coldest) TMax (TMin) occurred. There are 153 (122) days in the May-Sep (Dec-Mar, leap year) for which a daily record will be achieved. The number of extremes occurring in each year is calculated per station then geographically interpolated as discussed above. This metric is more robust than the single All-Time metric above as each station contributes 153 (122) values to the time series rather than just one. This also provides an indication of the incidence of multiple hot and cold records to help identify periods of excess heat (cold).
The expected value for a purely random process for the number of daily TMax (TMin) records would be 1.20 (0.96) in a given year per station for a 127-year record (i.e., 1.20 = 153/127 and 0.96 = 122/127). The results (Fig. 4) indicate again that 1936 contributed the most daily hot records for the CONUS at 6.7 per station but followed more closely by other years, with 1934 (5.3), 1931 (3.4) and 1911 and 1925 (3.3) completing the top five.
The number of coldest records occurred in 1899 (3.7) in association with February 1899 event. The following years experienced extreme cold as well, 1917 (3.3), 1989 (2.9), 1924 (2.4) and 1936 (2.4). Thus, 1936 was a year with many extremes on both ends of the thermometer.
Comparing the two metrics in Figs. 10 and 11 produces Fig. 12 which displays the sum and the difference, year-by-year of the 15-yr running means. The sum of days in extreme heat/cold declined from over 120 in the 1930s to about 75 since 1960. The conclusion here would be that the CONUS has experienced a decline of around 30% of these durative extreme events in the past 100 years. Along with this decline has been an increase in heatwave days vs. cold wave days since the 1970s, mainly due to the increase in heatwave days in the West (Fig. 10) and the decline in cold wave days overall.
Discussion
Overall, our project indicates that extremes in summer heat-related metrics for the CONUS as defined in the four questions above do not show increasing trends, but rather modest negative trends, and thus appear to be substantially affected by other forcings such as natural variability in addition to GHGs. There are positive TMax metric trends in western regions which are countered by larger negative trends elsewhere.
The number of cold extreme events has declined in the past 30 years too and this is likely, in part, related to the development of infrastructure around the stations which disturbs the nocturnal boundary layer, inhibiting the formation of the cold, shallow layer in which TMin is observed. Additionally, this result may be an early sign of atmospheric warming of the coldest air masses by the added GHGs (e.g., Krayenhoff et al. 2018), though this hypothesis has not been confirmed as a direct result of GHGs (e.g., Huang et al. 2023). Observations of the deep atmospheric temperature in the polar region north of + 60° latitude indicate a warming trend of + 0.47 °F (+ 0.26 C) decade− 1 since 1979 compared with a global trend of + 0.27 °F (+ 0.15 C) decade− 1 (Spencer et al. 2017). This would suggest Arctic air intrusions into the CONUS may be slightly warmer now than in the past century or so (for whatever reason) and thus consistent with the results shown here for a lessening of the magnitude of cold events in recent decades. However, we note the same area in the southern hemisphere shows virtually no warming (+ 0.05 °F (+ 0.03 C) decade− 1).
Conclusions
In the field of climate change, attention has been drawn to extreme metrics occurring in the last several years as evidence for human influences through increasing GHGs (e.g., USGCRP 2017; Seneviratne et al. 2021; Jay et al. 2023). Examining this aspect of climate and weather is appropriate since human thriveability is often constrained by the magnitude of the extremes that we experience. We describe here a dataset constructed to examine the occurrence through time of extreme temperature metrics in the CONUS for the coldest winter and hottest summer days since Dec 1898. The dataset is based on the 1,218 USHCN stations 1,211 of which have been supplemented to be “complete”, i.e., each station having at least 92% of days available for analysis.
The results indicate that extremes in heat-related metrics for daily TMax in the summer have not increased and in fact often show modest declines since 1899, due mostly to the early heat events during 1925–1954. This is consistent with Seneviratne et al. 2021 (IPCC AR6, their Fig. 11). Cold-related extreme events based on winter TMin show evidence of decreasing occurrences, two causes of which were proposed, (1) increasing human development around weather stations, and (2) an early response to increasing GHGs as they warm the coldest air first. When taken together, the occurrences of heat and cold extremes have declined over the past 127 years in the CONUS, i.e., the climate over the CONUS has become less impacted by temperature extremes to this point.
Relating this reduction of extreme events to increasing GHGs would be difficult
as the magnitude of the regional natural variability of weather and climate
is considerable in comparison to a small GHG-induced temperature rise.
Once the shifts were accommodated, the time series (Fig. 14) for Fresno 12-month running anomalies indicate very different results between TMax and TMin, which is a clear indication of the NCI of urbanization. The TMax time series indicates no trend through 2012 (slightly negative) but contains a relatively sudden rise in 2013 which is consistent with the entire western CONUS as seen in Figs. 5 and 10. The overall TMax trend is + 0.03 °F (+ 0.02 C) decade− 1. The trend in TMin is + 0.43 °F (+ 0.24 C) decade− 1.
The impact of Non-Climatic Influences (NCI) was considered in the temperature evolution of one USHCN station, Fresno California, as an example of a clear and large response to forcings unrelated to the increasing GHGs. In this case, the urbanization impact on TMin of 5 °F (~ 3 °C) is clearly apparent, while summer TMax (with urbanization) indicates a trend not significantly different from zero. Voluminous research has and will be performed on this aspect of surface temperature records as these types of influences need to be identified and removed so that changes in the background climate due to GHGs may be estimated with more confidence. We also demonstrated that one must be cautious when interpreting official statements about extreme weather events for the CONUS.
Jason Isaac and Steve Milloy bring tidings of great joy in 2026 in their Washington Examiner article with the title as above.
Every April, like clockwork, a predictable ritual unfolds. Earth Day rolls around with the same tired apocalyptic sermon from the climate catastrophe cult.
The routine never changes: The planet is dying, humans are to blame, and only surrendering your freedom, your car, and your paycheck to the green elites will save it. Fifty-six years later, they’re still wrong.
The planet is fine. It’s the climate cult that’s cracked.
You’d think after all the busted prophecies, they’d tone it down. Instead, they double down.
Remember when the “experts” said the Arctic would be ice-free by 2013? The ice is still there, just as thick and stubborn as ever.
We were told hurricanes would grow “more frequent and more powerful.” Instead, there were near-normal seasons in 2023 and 2024.
So now they move the goalposts: Every weather event, hot or cold, wet or dry, is “caused by climate change.” It’s not science. It’s superstition plotted on graphs. They said snow would vanish from ski resorts — remember that “End of Snow” panic? Instead, skiers in the Northeast this year were digging out from record blizzards.
The 2023-2024 warming spike was caused by a natural El Nino. When the El Nino ended, the spike ended. February 2026 was cooler, in fact, than February 1998 despite a trillion tons of emissions.
Time after time, the “experts” predict apocalypse. And year after year, Mother Nature refuses to corroborate their stories.
Cleaner Air Than Ever Before
Air Quality – National Summary EPA
Meanwhile, the actual data tell a different story. U.S. air quality today is the cleanest it’s been in 50 years.
My Mind is Made Up, Don’t Confuse Me with the Facts. H/T Bjorn Lomborg, WUWT
Global deaths from natural disasters have plummeted over 90% since the early 20th century. Crop yields worldwide keep hitting records.
Humans are safer, wealthier, and more energy-secure than at any time in history.
The planet isn’t gasping for breath — it’s very healthy.
That’s exactly what George Carlin was getting at in his legendary bit, “The Planet Is Fine.” Over three decades ago, long before “climate anxiety” was a diagnosis, Carlin, perhaps the most famous comedian of his time, saw through the sanctimony.
The planet’s been through ice ages, asteroid strikes, and supervolcanoes — and it’s still spinning. Yet today’s enviroactivists think your SUV is going to do what Mount Tambora couldn’t? Please. Their arrogance is nauseating.
The self-appointed saviors of Earth don’t really care about the planet.
They care about control.
Earth Day has turned into a political holiday — a green May Day for those who want to remake society in their image. Their “solutions” invariably mean more regulation, higher taxes, and fewer choices.
Shut down the power plants, outlaw gas stoves, ban plastic straws while flying private jets to elitist conclaves dressed up as ‘‘climate conferences.”
It’s not about saving Earth. It’s about saving face.
When the predictions fail, the excuse shifts. Sea levels were supposed to swallow Manhattan, but the only thing underwater now is former Vice President Al Gore’s credibility.
Polar bears were “going extinct” until the population hit record highs. Every “climate emergency” gets debunked, but the headlines roll on because fear sells.
Carlin joked that people crave bad news. The legacy media just industrialized it.
And the public is getting wise. Net-zero mandates
are collapsing under their own absurdity.
Europe ran headfirst into the wall of “green reality” and came crawling back to coal and nuclear. Even California’s self-inflicted energy shortages have people asking whether energy policy should be based on cockamamie models or common sense.
The answer should be obvious: If your plan can’t keep the lights on, it’s not saving the planet — it’s sabotaging it.
“Follow the science” is their mantra. Fine.
The science says carbon dioxide is plant food.
The science says climate models have blown past reality for decades. The science says mankind thrives in warmer eras.
None of this fits the narrative, so it gets buried under the next climate scare of the month. The apocalypse never arrives — but the grant money does.
Here’s the part Earth Day activists really hate: The planet isn’t fragile — we are.
Nature doesn’t need our policies, our pledges, or our petitions. It will outlast every last panel discussion in Davos, Switzerland.
So instead of groveling over our collective “climate guilt,” maybe they should celebrate what we’ve actually accomplished: clean air, longer lives, record food production, and energy that works at the flick of a switch.
The planet doesn’t care about your compost bin or your latest electric car mandate. It’s been around for 4.5 billion years, and cooling for the last 485 million years, and it will still be here when the last climate model is rotting on an obsolete hard drive.
It’s humans who need perspective. As Carlin famously said, “The planet is doing great.” The hysterical people who keep screaming that it isn’t are the problem.
Two things happened in February that will change the world. The first is the Iran War.
The second is an event so obscure most Americans don’t even know it happened — the Feb. 12 repeal of the 2009 Endangerment Finding by the Trump Administration’s Environmental Protection Agency (EPA). This decision puts a knife into the kidney of all the major U.S. climate rules made under the Obama and Biden administrations. It was the legal underpinning for the Green New Deal.
Of the two events, the end of the Endangerment Finding is of a greater consequence, yet 21st Century conventional wisdom — curated and gatekept by social media, the most unwise medium ever invented — makes it hard to fit one’s head around this argument. But here goes.
The Iran War is costing about $1-2 billion a day in direct costs,and several times that in indirect costs from higher energy prices across most of Europe and Asia, though less so in the United States, which is increasingly energy independent.
Meanwhile, the 2009 Endangerment is one of those “regulatory state” workarounds when Congress doesn’t pass a law or the Supreme Court passes on a tough decision. This administrative decision is the foundation of ALL modern climate regulation and global climate diplomacy. Its reversal has the Trump administration crowing about the $1.3 trillion in savings over the next decade to American citizens through cheaper automobiles, among other things.
This has made a lot of the right people unhappy.
In an interview with The New York Times, Jody Freeman, director of Harvard Law School’s Environmental and Energy Law Program, who happened to design the Endangerment Finding for the Obama White House, said the Trump administration wants “to not just do what other Republican administrations have done, which is weaken regulations. They want to take the federal government out of the business of regulation, period.”
Speaking as someone who worked at the EPA during the first Trump administration, I know Freeman is wrong. Republicans don’t mind environmental regulation based on good incentives that don’t penalize industries that are politically disfavored through no fault of their own.
But there is a human cost to all regulation that is essentially unpriced,
and it is something Freeman and the Left never acknowledge.
Federal regulation itself was invented by the government to improve human lives — think the Safe Drinking Water Act, the Clean Air Act, or the 1938 Fair Labor Standards Act that ended child labor. The problem is that future choices forgone, which economists call opportunity costs, are nearly impossible to quantify and constrain, thereby stifling innovation and invention in almost unfathomable ways.
Consider the following counterfactual.
If the U.S. Supreme Court had made privacy laws stricter in the late 1990s, sharing pictures of strangers without their permission would have been illegal. This would have disincentivized early camera phone makers, Sharp and Sanyo, from including cameras in the first smartphones in the early 2000s and would have slowed or even undermined Apple’s decision to build the iPhone.
Less than 25 years after the first U.S. camera phone was released, the total value of mobile technologies and services globally exceeds $7 trillion, representing more than 6% of global GDP. Much of these trillions of dollars of newly created wealth exists in the share price of Silicon Valley firms, and the retirement savings of nearly 100 million Americans and the U.S. economy writ large.
What the Endangerment Finding did was create a domestic legal predicate
to treat carbon dioxide as a pollutant under the Clean Air Act.
That predicate, in turn, allowed Democratic administrations to commit America to the Paris Agreementand the broader U.N. climate regime that the U.S. Senate was fooled into accepting when it passed the United Nations Framework Convention on Climate Change (UNFCCC) in 1992.
It’s quite possible that the global climate regime created under UN sponsorship had a similar effect on energy-intensive industries to that a strict privacy law would have had on smartphones, which became the entry point for billions of people into the digital economy.
And now it’s ending. By undoing the Endangerment Finding, you don’t just repeal a regulation; you repeal the regulatory superstructure that has saddled the United States with trillions of dollars in opportunity costs and billions in explicit costs every year.
Thus, however costly a short conflict with Iran would be, it hasn’t been
nearly as much as the unpriced opportunity costs of
the last 30 years under the UN Climate regime.
Once the U.S. is no longer legally bound at home, it can exit the international framework cleanly. And when America leaves, the dominoes fall in order. Russia, China, India, and Saudi Arabia — none of whom ever believed “the planet is dying” rhetoric anyway — will follow suit. They never saw the climate treaty as anything other than a wealth-transfer mechanism from the West, and now the jig is up for the American Left and the European establishment.
Instead of this transhumanist dystopia, we have the possibility of
returning meaningful heavy industry to the U.S.,
creating over a million good-paying craft jobs,
while still maintaining strong environmental laws.
Indeed, fears of environmental backsliding could be easily remedied by Congress if it were to pass the Affordable, Reliable, Clean Energy Security Act (ARC-ES), introduced in Congress late last year by Rep. Troy Balderson (R-OH). The ARC-ES bill would codify into law clear definitions of key terms like “affordable,” “reliable,” and “clean,” ensuring that investment risks are limited to cost-effective infrastructure projects only.
The bill would help America’s most affordable, reliable, and environmentally-friendly energy sources, including nuclear and natural gas, remain part of the energy mix — a crucial requirement for American households and businesses.
The fact that neither the ARC-ES nor the Endangerment Finding’s reversal of fortune is anywhere in the news tells you everything you need to know about the current state of global journalism.
This is no slight to the news coverage concerning Iran, which is compelling, but all over the place. It just shows how incentives for informing the public in the 21st century about what truly matters in their lives are weak and getting worse. Perhaps one day someone will invent a better medium for information.
William Murray is a former speechwriter for the Environmental Protection Agency (EPA), the past editor of RealClearEnergy from 2015 to 2017, and currently the chief speechwriter for the Commodity Futures Trading Commission (CFTC).
The Biden administration’s obsession with climate change has contributed to the housing affordability challenges Americans face today, and there are many harmful green policies that need to be undone. The Trump administration is taking an ax to several of them, and it just received a big boost when a U.S. District Court repealed a measure burdening low-income and first-time home buyers.
Specifically, on March 5th, an Eastern District of Texas decision vacated a 2024 requirement from the Department of Housing and Urban Development (HUD) that new homes qualifying for federally-backed mortgages must comply with the 2021 International Energy Conservation Code (IECC). Thankfully, the court in Utah v. HUD found the agency’s actions in violation of the law.
The IECC is a spare-no-expense assault on residential energy use – for example, by requiring far more insulation than makes sense and necessitating costlier appliances. A number of environmental organizations advocated for the IECC’s building code dictates, saying they would ensure that “low-income homeowners and residents are prioritized in a climate-aligned future.”
And mind you, this was HUD – not the Environmental Protection Agency – an agency whose core mission is to make housing more affordable. Yet it was trying to impose these expensive environmental requirements on the very Americans who need federal help to qualify for a mortgage. In fact, over 80% of HUD-backed mortgages have gone to first-time buyers with lower credit scores and smaller down payments than those served by conventional lenders.
Matt Ridley explains the demise of climatism in his recent video The Great Climate Climbdown is finally here – How can we undo the Damage Caused? For those preferring to read, there is a transcript below with my bolds and some helpful images.
I’m going to try and give you my perspective on which arguments have made the difference in terms of changing people’s minds on climate, and therefore the kinds of evidence and arguments that we should be pushing in order to try to win this battle. The genesis for this was this article I wrote in The Spectator saying that I really do think the climate emergency talk has peaked, and we are seeing a significant change. If you live in the British Isles, that’s not immediately apparent.
Climate Lemmings
It’s still a huge issue in Britain and Ireland, and most of Europe. But if you spend any time in America now, or even in Asia, you are seeing a very, very different debate where the affordability of energy is much more important than decarbonisation, where the demands of AI, etc., have trumped the requirement to cut carbon dioxide emissions. I think Britain and Ireland are getting left behind here, and we need to get with the conversation that’s happening elsewhere.
I think the images are covering the latter half of that graph, so you can’t see, but there has been a decline in newspaper coverage. There’s all sorts of straws in the wind, like I mentioned Bill Gates closing down the advocacy office, the Banking Alliance for Climate Change has closed down. A lot of companies are tiptoeing away from this issue, and it therefore is a moment when it might die out.
More likely, it will go quiet for a while, and then we’ll have more air pumped into the balloon at some point in some form or other. There’s such a gigantic vested interest these days in climate alarm that one can’t ever write it off completely. But here are 10 reasons I think why it’s fading, and I’ll run through them in more detail, but I’ll just quickly list them here.
I think it’s important not to underestimate the degree to which the COVID pandemic has left people mistrustful of science and of experts, and that has significantly damaged trust in science, and that is infecting the climate debate. Of course, over-claiming and some degree of fraud have been a problem in the climate science arena for even longer, but I think you are getting traction now because of COVID. Most important, of course, is that we were told that the decarbonization of the world energy system would pay for itself, would be profitable.
That is clearly not the case. It’s proving costly, inconvenient, and regressive in that poor people are paying more than rich people for this transition, and that I think is why a lot of ordinary people are beginning to see through the alarm. The transition to wind and solar, which I call unreliable because there are lots of renewable energies, but the distinguishing feature of wind and solar is that you can’t rely on them.
The transition to them is simply failing to materialize, I will argue. I don’t fully understand why, if you’re worried about what’s happening to climate change, you are automatically passionately in favor of wind and solar power. It just doesn’t necessarily follow, in my view.
I think it’s important not to underestimate how much the shale revolution has changed everything. Until 15 years ago, it was still easily possible to talk about oil and gas running out and therefore getting more expensive, and that would therefore necessitate a switch from hydrocarbons. That changed with the discovery of how to get gas and oil out of shale, and the effect on America’s position as a gas and oil producer and as an energy consumer is extraordinary, I think, and many people outside America just don’t realize this.
We’re so indoctrinated with the idea that the big energy transition of our time is windmills and solar panels that we don’t notice that the big energy transition of our time is actually shale. The fact that the AI industry needs reliable, affordable power has led much of tech to become much more realistic and pragmatic about energy, and getting it from shale gas power stations is now the top priority for most of the companies rushing into AI and data centers.
On the science, I’m somebody who thinks it is getting warmer. Springs are getting nicer, winters are getting milder, summer’s not much different, but I don’t think it’s getting worse, and I think that is what most people are now beginning to realize after 50 years of being told that the future is going to be horrible. We’re living in that future, and it ain’t too bad. One of the reasons for that is because the models are still running too hot and have been consistently, because they’re assuming higher climate sensitivity than the science now supports.
I think that there is now so much evidence that the recent past, by which I mean the current interglacial, the Holocene period, starting about 9,000 years ago, has been much, much warmer in its first half than it is today. That evidence is getting harder and harder to hide, deny, or ignore. Therefore, we are a long way from living in unprecedented temperatures.
The fact that we’re unprecedented compared with the 19th century is not really the relevant comparison. For me, one of the big stories is that the effect of carbon dioxide on green vegetation is much greater than scientists expected or predicted. They did not think it was a limiting factor in most ecosystems, and yet it’s turning out to be an enormous effect, much more measurable, actually, than the effect of carbon dioxide on warming.
If carbon dioxide is a problem, we ought to be able to measure its cost and then tell ourselves how much this generation should pay for a cost that’s going to fall on a future generation, how much we discount the future. That calculation, it seems to me, if done honestly, is more and more playing against alarm. Just to the first point about overclaiming and fraud, which is damaging trust in science, the record of predictions about what’s going to happen in the climate and the chickens that are coming home to roost on this are more and more helpful, I think, to the argument.
Al Gore is known now more for predicting that the Arctic would be ice-free within five years in 2009 than he is for some of the other things he’s said. It has damaged the reputation of people like that. I enjoyed this quote from Ted Turner, that within 30-40 years, no crops will grow, most people will have died, and the rest of us will be cannibals.
It’s quite extraordinary what people have been getting away with saying in order to get noticed in this debate. The UN Secretary General standing up to his knees on a beach in Tuvalu makes great cover for Time magazine, but I think this kind of thing no longer cuts through to people, partly because people now realize that islands like Tuvalu are not sinking, they’re actually gaining land area because of wave action. You can’t see it because it’s on the corner there, but I’ve included Andrew Montford’s hockey stick delusion here because I do think that the hockey stick story is one of significant scientific malpractice, and that ought to be better known.
This picture just sums up a lot of what went wrong in recent years, and I don’t think you’re going to see this kind of uniparty consensus again. Here is the environment secretary or shadow secretaries of the British government, the Tory party, the Liberal Democrat party, and the Labour party all standing up and giving a round of applause to Greta Thunberg. Greta Thunberg is saying, unfortunately I can’t quite read what she’s saying because it’s hidden behind the thing for me, I hope it is for you, but that we’re setting off an irreversible trend that will end civilization by 2030.
That’s what she actually said in parliament in Westminster that day. Michael Gove, the Tory, said your voice is still calm, it’s the voice of our conscience, we feel great admiration, and Ed Miliband said you’ve woken us up. So this kind of political consensus has been a huge problem.
The fact that no party has been prepared to rock the boat, that is changing even in Britain now. We have the Reform Party and the Conservative Party both being much more skeptical on climate and energy issues. The degree to which electricity and gas prices have exceeded those in America now, in Europe and in the UK in particular, and in Ireland, is more and more striking.
Figure 4 – International Domestic Electricity Prices (p per kWh). UK has the highest domestic electricity prices in the IEA.
And paying four times as much for your energy, whether it’s gas or electricity, is not compatible with remaining competitive. And we are seeing Britain losing its fertilizer, chemical, pharmaceutical, motor, steel, many many other industries at a terrifying rate. Not only that, we are cutting ourselves off from being able to take part in a significant way in the AI industry and some of the other industries of the future, some of the robotics industries and so on.
So this really is where it’s going to hurt ordinary people to have been so far ahead of everyone else in trying to decarbonize our economy. The electric car revolution has been forced on consumers, it’s relatively unpopular for lots of reasons, reliability, cost, charging times. And if you do the analysis on a Chinese electric grid, it’s hard to see how they save any emissions at all, because it’s basically a coal car when you’re running an electric car in China.
Less so in Europe, where most of the electricity comes from gas. But even there, it takes many tens of miles before you’ve really saved any emissions at all, or saved significant quantities of emissions. And at that point, the battery is probably nearly dead anyway, so you’re about to replace it.
So to replace a functioning industry, quite a successful industry in the UK, the motor industry, with one that is really struggling, is a bad thing in itself. And to do so at significant cost and inconvenience to the consumer really is an own goal. I’d say the same kind of thing about heat pumps, replacing gas-fired boilers, fine if it’s a new-build house, much harder if you’re adapting an existing house and have to change the insulation and everything.
And even if it works for the same price, you’re removing a system before the end of its useful life and replacing it with one that’s no better. Therefore, there is no growth in economic terms, and you are effectively stranding assets in doing that. And refusing to build a third runway, trying to limit how much people fly, and telling people that they shouldn’t eat meat is not only counterproductive in political terms, this is backfiring quite significantly even in Europe, much more so in Asia and America.
The big one, as far as the electricity system is concerned, is of course the dash for renewables, for unreliables, in particular solar and wind, where it’s not just the unreliability, the intermittency, but the extreme cost of a system based on that. Britain is producing, well, it has the capacity to produce 21% more electricity now than 15 years ago, but it consumes 24% less electricity than 15 years ago. Now, doing less with more is the very definition of degrowth or impoverishment, and that is a real problem that we are creating for ourselves in this country.
You can’t see the end of this chart, but the global direct primary energy consumption is still vastly dominated by the hydrocarbons around the world. That has not changed. They’re all still breaking records, all three of them.
And if you zoom in to the top corner of that graph, you can just about see the contribution that solar and wind are making to the world economy. It is infinitesimal, and yet it’s around 6%, I think, now if you add them both up, and yet the coverage of the energy industry is dominated by these two rather medieval technologies. Talking of medieval, this is a book about the crop yields of the manors belonging to the Bishop of Winchester in the 1300s.
You may wonder why I brought it up, but if you zoom in on it, you’ll see that most of these manors were producing between one and four grains of wheat per grain they sowed in the ground, an energy return on energy invested of about between one and four. And of course, you’ve got to keep one grain back to sow next year’s crop. So in a year when you only produce one grain, you’ve got almost nothing to feed people with.
And that is the motor for most of the work done in society by people, and in terms of oats, the same for horses. On my farm in Northumberland today, I would expect to get about 100 grains of wheat for each grain that I sowed in the ground. This energy return on energy invested calculation is, I think, an absolutely critical one, and the one that the unreliable industry is really, really struggling on.
Again, you can’t see the right-hand side of the graph, but you can see this is a calculation of the energy return on energy invested. And if you buffer it by reliability, by the fact that you have to back up wind and solar, it’s hard to see how these reach the economic threshold. Because if you’re producing four units for every unit of energy that goes in, then you’re effectively recreating the medieval economy.
EROI = Total Energy Output / Total Energy Input
And the problem with the medieval economy was that it could only make a few bishops rich, and nobody else could get rich at all. Because otherwise, when you get down to a ratio of three or four energy return on energy invested, a significant proportion of your industry has to be spent making energy. You don’t have much left over to do other things with.
So I think this is the measure that really needs to be rammed home. But on solar, it is just worth pointing out that according to the World Bank, Britain is the second worst country in the world to build solar because of its cloud cover and the cost of land. The only worst country, I’m sorry to say, is Ireland.
Again, it’s disappointing that you can’t see this graph. I hadn’t realized that all these pictures would be on the right-hand side covering it. But the point of this graph is to show that America was a static or declining producer of gas until the early 2000s. It is now by far the biggest gas producer in the world, equal to Russia and Qatar put together. That’s an extraordinary transformation. The same for oil.
Luckily, you can see it here. Everybody, it was said, and it was conventional wisdom, it was groupthink, that America was a played-out declining oil basin, that it would decline steadily from the 1970s onwards. And there was no gain saying that.
And then along came the shale pioneers and turned that around. America now produces more oil than Saudi Arabia and Iraq put together. That’s an extraordinary transformation.
So no one now talks about peak oil, about oil and gas running out in the rest of the world, and therefore about expensive oil. Yes, geopolitics can affect oil and gas prices, but usually only temporarily. The AI revolution is largely fueled by gas and coal with some nuclear. Solar and wind are not the go-to uses for this power, as I mentioned.
What about the climate itself? Well, it is getting warmer. These are early Humlum’s analysis of the five different ways of measuring global average temperature, going up at the rate of, well, going up pretty slowly, heading for about a degree of warming after about 50 years.
But do we believe the numbers?
Because I do think that we need to keep talking about the adjustments that are made to temperature records. I mean, here is a graph that early Humlum produces in which he points out that the GISS estimate of what the temperature was in January 2000 has been adjusted upwards, particularly in September 2013. Maybe that’s fair enough. Maybe they had a reason for doing that. But in the same month, they adjusted the temperature for January 1910 significantly downwards. How can they possibly have had a good reason for doing that?
I think one is quite right to be suspicious of this. Cooling the past in order to warm, in order to increase the rate of warming is just too tempting for the people who are in charge of these statistics. And I haven’t touched on the urban heat island effect and the unreliable thermometer stations and so on, but there’s plenty of those issues too. But the real point, as far as the man in the street is concerned, is the weather getting worse? Yes, it’s getting warmer, but is it getting worse? And no, it’s not.
The global tropical cyclones are not getting more frequent or more lethal. Drought is showing no trend in upwards or downwards, really. And as Roger Pielke has summarized, for most of the significant weather effects, except heat waves and perhaps heavy precipitation, then there is no detection or attribution as stated by the Intergovernmental Panel on Climate Change reports.
This is from AR7, their latest report. And of course, the point which Bjorn Lomborg has made, among others, that higher temperatures, sorry, heat kills far more people, cold kills far more people than heat, and if we have higher temperatures, we will have slightly more people killed by heat, but a lot fewer people killed by cold. So we are genuinely saving lives through global warming.
My Mind is Made Up, Don’t Confuse Me with the Facts. H/T Bjorn Lomborg, WUWT
Generally, deaths from climate change, as many of you will know, are down significantly, whereas deaths from earthquakes, tsunamis and volcanoes are not. That’s a remarkable statistic, which is not because weather’s getting safer, but because we’re getting better at forecasting, predicting and sheltering people from bad weather. People get very worked up about sea ice decline, but it’s slow.
And the Arctic hasn’t broken a sea ice low record since 2012. Antarctica has seen a recent slight downward trend, but there is no evidence that we’re getting anything like an Arctic, an ice-free period in the Arctic summer, which was quite routine 8,000 or 9,000 years ago.
Sea level rise, significant, but no sign of acceleration. The linear trend since 2010 is higher than the linear trend since 2005, but the linear trend since 2015 is lower again. So it’s going up and down, but it’s around a foot and a half per century, which is easily something we can cope with. I won’t go into the details, but I think Nick Lewis in particular and Judith Currie have done a very good job of showing in the peer-reviewed literature that the estimates of climate sensitivity that are going into the models have broadly been too high and they need to come steadily downwards.
And that would explain why the models have been running too hot compared with the global temperature. I think the Holocene Thermal Maximum is a very important point that we need to keep stressing because the temperature of Greenland and the Makassar Strait, two different datasets here, was significantly higher 6,000 BC, 8,000 years ago, than they are today. This data is coming in now from many different types of paleo temperature records showing the Holocene Climate Optimum.
Fig. 1. Climate change in the Holocene, adapted from Palacios et al. (2024a) and modified: warm periods are in yellow and less warm in pale yellow, and cold in blue; Bond Events are after Bond et al. (1997, 2001) and geochronology after Walker et al. (2019).
I was looking, for example, at evidence that in the Indian Ocean, sea levels were considerably higher than they are today. It used to be the consensus that they’d been going up steadily since the Ice Age, or rapidly and then steadily. It’s now reckoned that they may have been up to two meters higher in the period when the first pharaohs were already appearing in Egypt. So that’s not that long ago. And that Holocene Optimum was a period of considerable wetness in the Sahara, lakes and hippos in the Sahara region. So this was a period within human history, in the early period of human history, when we were experiencing much warmer and damper temperatures.
But I think global greening is the big one. Here we have considerable evidence from a number of different directions that there’s 15% more green vegetation on the planet after 30 years because of carbon dioxide fertilization. And that is in all ecosystems, particularly arid ones, but in tropical ones and arctic ones as well, and in marine ones as well as terrestrial ones. That is a really significant effect. If you add the effect it’s had on agricultural yields alone, it comes to trillions of dollars of benefit for mankind. But then let’s add in the benefit for grasshoppers and gazelles and all the other creatures that eat green vegetation.
Now, I published an article about this in 2013, when I first got wind that the satellite data had been analyzed and was showing this global greening. Before then, there were other measures for picking up, but it hadn’t been analyzed from satellite data. And this annoyed the professor whose work I was reporting very much indeed, so much so that when he published his work, the press release from Boston University named me personally, along with Rupert Murdoch, as being the kind of person who mustn’t be allowed to misinterpret this result.
Well, I call that a win, actually, if I’m getting a name checked in the press release. Now, on the social cost of carbon, Britain doesn’t use the social cost of carbon. They can’t make it add up. They simply can’t get an estimate of it that’s high enough to justify the money we’re spending on decarbonization. America did use a high one during the Biden administration, but Ross McKitrick has basically demolished the argument behind that. It largely left out the carbon dioxide fertilization effect.
And his own estimates of the social cost of carbon are that it’s pretty small, that it’s of the order of $5 to $10 per ton of carbon. That’s the total future harm done by each ton of carbon dioxide we produce today. Well, the cost of decarbonization is way higher than that.
So it just doesn’t make sense to pay a fortune for something that will save a penny. Worse than that, they are claiming to help wealthy future people by asking poor people today to make sacrifices, poor people within countries where energy policies tend to be regressive, between countries where we are on the whole denying cheap energy to many poor countries, and of course, between generations as well. I won’t look at those quotes.
So these are the five economic scenarios that IASA did for the IPCC showing what might happen to global GDP per capita. And it’s worth just looking at the one they call taking the highway fossil fuel development. This is the one in which we really let rip and continue to use hydrocarbons on a significant basis and end up with quite a lot of warming as a result.
It’s a scenario in which per capita income is roughly 10 times what it is today, 10 times. Globally, everybody on planet Earth is earning 10 times as much. Imagine what they could do with that, in which the Gini coefficient is down significantly from 0.6 to 0.1, which population falls faster than expected, whether that’s a good thing or a bad thing, in which there is rapid technological progress, strong investment in health and education, effective management of ecological systems.
This is not a terrible world. It sounds like rather a good world. And if, yes, there’s a lot of warming, then we’re 10 times as rich to deal with it. Surely the warming will have done economic harm. Yes, it will. How much harm? It will have reduced the wealth of your grandchildren. Instead of being 10.4 times as rich, they will be 9.8 times as rich. Is that really an existential catastrophe? There’s a reason why we use a discount rate. Lord Stern persuaded us in the mid-2000s that we should not use a discount rate about the future because we’re looking after our grandchildren. We should care about them just as much as we care about ourselves. But if they’re going to be 10 times as rich, then it doesn’t make sense to hurt poor people today to make them not quite 10 times as rich.
So, just to end, what are we still up against?
Massive subsidies and funding for climate alarm.
You can’t underestimate the power of money.Widespread bias and censorship still in the media. Some doubling down on the point that solar power doesn’t come through the Strait of Hormuz.
Doesn’t this crisis prove that we should wean ourselves off fossil fuels? Climate is a very good excuse for politicians. Again and again you’ve seen people like the governor of California saying yes the Palisades fire burned a lot of people’s homes but there’s nothing I can do about it because it was caused by climate change. There was something you could do about it. You could have done prescribed burning but climate change gets you off the hook as a politician.
I do believe that it’s a mistake to go too far in skepticism and call it things like a hoax. That does tend to put people off. But the problem with our side of the argument is we can’t be bothered to sit on these committees and get stuck into the detail and do all the really boring leg work and go to these awful conferences. And that’s what we ought to be better at. And that’s about the only thing I can say that we are the in criticism of the skeptical side of the debate. Thank you very much.
The post below updates the UAH record of air temperatures over land and ocean. Each month and year exposes again the growing disconnect between the real world and the Zero Carbon zealots. It is as though the anti-hydrocarbon band wagon hopes to drown out the data contradicting their justification for the Great Energy Transition. Yes, there was warming from an El Nino buildup coincidental with North Atlantic warming, but no basis to blame it on CO2.
As an overview consider how recent rapid cooling completely overcame the warming from the last 3 El Ninos (1998, 2010 and 2016). The UAH record shows that the effects of the last one were gone as of April 2021, again in November 2021, and in February and June 2022 At year end 2022 and continuing into 2023 global temp anomaly matched or went lower than average since 1995, an ENSO neutral year. (UAH baseline is now 1991-2020). Then there was an usual El Nino warming spike of uncertain cause, unrelated to steadily rising CO2, and now dropping steadily back toward normal values.
For reference I added an overlay of CO2 annual concentrations as measured at Mauna Loa. While temperatures fluctuated up and down ending flat, CO2 went up steadily by ~66 ppm, an 18% increase.
Furthermore, going back to previous warmings prior to the satellite record shows that the entire rise of 0.8C since 1947 is due to oceanic, not human activity.
The animation is an update of a previous analysis from Dr. Murry Salby. These graphs use Hadcrut4 and include the 2016 El Nino warming event. The exhibit shows since 1947 GMT warmed by 0.8 C, from 13.9 to 14.7, as estimated by Hadcrut4. This resulted from three natural warming events involving ocean cycles. The most recent rise 2013-16 lifted temperatures by 0.2C. Previously the 1997-98 El Nino produced a plateau increase of 0.4C. Before that, a rise from 1977-81 added 0.2C to start the warming since 1947.
Importantly, the theory of human-caused global warming asserts that increasing CO2 in the atmosphere changes the baseline and causes systemic warming in our climate. On the contrary, all of the warming since 1947 was episodic, coming from three brief events associated with oceanic cycles. And in 2024 we saw an amazing episode with a temperature spike driven by ocean air warming in all regions, along with rising NH land temperatures, now dropping well below its peak.
Chris Schoeneveld has produced a similar graph to the animation above, with a temperature series combining HadCRUT4 and UAH6. H/T WUWT
March 2026 UAH Temps: SH Ocean Warms, NH Land Cools
With apologies to Paul Revere, this post is on the lookout for cooler weather with an eye on both the Land and the Sea. While you heard a lot about 2020-21 temperatures matching 2016 as the highest ever, that spin ignores how fast the cooling set in. The UAH data analyzed below shows that warming from the last El Nino had fully dissipated with chilly temperatures in all regions. After a warming blip in 2022, land and ocean temps dropped again with 2023 starting below the mean since 1995. Spring and Summer 2023 saw a series of warmings, continuing into 2024 peaking in April, then cooling off to the present.
UAH has updated their TLT (temperatures in lower troposphere) dataset for March 2026. Due to one satellite drifting more than can be corrected, the dataset has been recalibrated and retitled as version 6.1 Graphs here contain this updated 6.1 data. Posts on their reading of ocean air temps this month are ahead the update from HadSST4. I posted recently on February 2026 NH and Tropic SSTs Warm Slightly. These posts have a separate graph of land air temps because the comparisons and contrasts are interesting as we contemplate possible cooling in coming months and years.
Sometimes air temps over land diverge from ocean air changes. In July 2024 all oceans were unchanged except for Tropical warming, while all land regions rose slightly. In August we saw a warming leap in SH land, slight Land cooling elsewhere, a dip in Tropical Ocean temp and slightly elsewhere. September showed a dramatic drop in SH land, overcome by a greater NH land increase. 2025 has shown a sharp contrast between land and sea, first with ocean air temps falling in January recovering in February. Then in November and December SH land temps spiked while ocean temps showed litle change. In February 2026 NH land temps doubled, from Dec. 0.53C up to 1.14C last month. Despite SH land changing little, and Tropical land cooling, the Global land anomaly jumped up from 0.53 to 0.93C. That reversed in March with both NH land and Global land anomaly back down to 0.63C. That cooling offset SH Ocean warming doubling from 0.19C to 0.38C.
Note: UAH has shifted their baseline from 1981-2010 to 1991-2020 beginning with January 2021. v6.1 data was recalibrated also starting with 2021. In the charts below, the trends and fluctuations remain the same but the anomaly values changed with the baseline reference shift.
Presently sea surface temperatures (SST) are the best available indicator of heat content gained or lost from earth’s climate system. Enthalpy is the thermodynamic term for total heat content in a system, and humidity differences in air parcels affect enthalpy. Measuring water temperature directly avoids distorted impressions from air measurements. In addition, ocean covers 71% of the planet surface and thus dominates surface temperature estimates. Eventually we will likely have reliable means of recording water temperatures at depth.
Recently, Dr. Ole Humlum reported from his research that air temperatures lag 2-3 months behind changes in SST. Thus cooling oceans portend cooling land air temperatures to follow. He also observed that changes in CO2 atmospheric concentrations lag behind SST by 11-12 months. This latter point is addressed in a previous post Who to Blame for Rising CO2?
After a change in priorities, updates are now exclusive to HadSST4. For comparison we can also look at lower troposphere temperatures (TLT) from UAHv6.1 which are now posted for March 2026. The temperature record is derived from microwave sounding units (MSU) on board satellites like the one pictured above. Recently there was a change in UAH processing of satellite drift corrections, including dropping one platform which can no longer be corrected. The graphs below are taken from the revised and current dataset.
The UAH dataset includes temperature results for air above the oceans, and thus should be most comparable to the SSTs. There is the additional feature that ocean air temps avoid Urban Heat Islands (UHI). The graph below shows monthly anomalies for ocean air temps since January 2015.
After sharp cooling everywhere in January 2023, there was a remarkable spiking of Tropical ocean temps from -0.5C up to + 1.2C in January 2024. The rise was matched by other regions in 2024, such that the Global anomaly peaked at 0.86C in April. Since then all regions have cooled down sharply to a low of 0.27C in January. In February 2025, SH rose from 0.1C to 0.4C pulling the Global ocean air anomaly up to 0.47C, where it stayed in March and April. In May drops in NH and Tropics pulled the air temps over oceans down despite an uptick in SH. At 0.43C, ocean air temps were similar to May 2020, albeit with higher SH anomalies. In November/December all regions were cooler, led by a sharp drop in SH bringing the Global ocean anomaly down to 0.02C. January and February saw continued Tropical cooling and NH cooling as well pulling Global ocean air temps lower. Now in March 2026 SH ocean warmed pulling up the Global ocean air anomaly.
Land Air Temperatures Tracking in Seesaw Pattern
We sometimes overlook that in climate temperature records, while the oceans are measured directly with SSTs, land temps are measured only indirectly. The land temperature records at surface stations sample air temps at 2 meters above ground. UAH gives tlt anomalies for air over land separately from ocean air temps. The graph updated for March is below.
Here we have fresh evidence of the greater volatility of the Land temperatures, along with extraordinary departures by SH land. The seesaw pattern in Land temps is similar to ocean temps 2021-22, except that SH is the outlier, hitting bottom in January 2023. Then exceptionally SH goes from -0.6C up to 1.4C in September 2023 and 1.8C in August 2024, with a large drop in between. In November, SH and the Tropics pulled the Global Land anomaly further down despite a bump in NH land temps. February showed a sharp drop in NH land air temps from 1.07C down to 0.56C, pulling the Global land anomaly downward from 0.9C to 0.6C. Some ups and downs followed with returns close to February values in August. A remarkable spike in October was completely reversed in November/December, along with NH dropping sharply bringing the Global Land anomaly down to 0.52C, half of its peak value of 1.17C 09/2024. In January and February Global land rebounded up to 1.14C, led by a NH warming spike. That was reversed in March back down to 0.63C despits some SH land warming.
The Bigger Picture UAH Global Since 1980
The chart shows monthly Global Land and Ocean anomalies starting 01/1980 to present. The average monthly anomaly is -0.02 for this period of more than four decades. The graph shows the 1998 El Nino after which the mean resumed, and again after the smaller 2010 event. The 2016 El Nino matched 1998 peak and in addition NH after effects lasted longer, followed by the NH warming 2019-20. An upward bump in 2021 was reversed with temps having returned close to the mean as of 2/2022. March and April brought warmer Global temps, later reversed
With the sharp drops in Nov., Dec. and January 2023 temps, there was no increase over 1980. Then in 2023 the buildup to the October/November peak exceeded the sharp April peak of the El Nino 1998 event. It also surpassed the February peak in 2016. In 2024 March and April took the Global anomaly to a new peak of 0.94C. The cool down started with May dropping to 0.9C, later months declined steadily until August Global Land and Ocean was down to 0.39C. then rose slightly to 0.53 in October, before dropping to 0.3C in December, and slightly higher now in February and March 2026.
The graph reminds of another chart showing the abrupt ejection of humid air from Hunga Tonga eruption.
TLTs include mixing above the oceans and probably some influence from nearby more volatile land temps. Clearly NH and Global land temps have been dropping in a seesaw pattern, nearly 1C lower than the 2016 peak. Since the ocean has 1000 times the heat capacity as the atmosphere, that cooling is a significant driving force. TLT measures started the recent cooling later than SSTs from HadSST4, but are now showing the same pattern. Despite the three El Ninos, their warming had not persisted prior to 2023, and without them it would probably have cooled since 1995. Of course, the future has not yet been written.
It rewrote March record books and even topped a few April records.
Here’s our full recap on this historic early spring heat wave
and how climate change likely influenced it.
Record-breaking March heatwave, intensified by climate change, continues to shatter records across the U.S., Climate Central
Record-shattering March temperatures in Western North America virtually impossible without climate change, World Weather Attribution
2026 likely to be the Hottest year ever? If you’re like me, your response is: That’s not the way it’s going down where I live. Fortunately there is a website that allows anyone to check their personal experience with the weather station data nearby. weatherspark.com provides data summaries for you to judge what’s going on in weather history where you live. In my case a modern weather station is a few miles away March 2026 Weather History at Montréal–Mirabel International Airport.The story about March 2026 is evident below in charts and graphs from this site. There’s a map that allows you to find your locale.
First, consider above the norms for March from the period 1980 to 2016.
Then, there’s March 2026 compared to the normal observations.
The graph shows this March had a few warm days, many days below zero and overall pretty much sub-normal. But since climate is more than temperature, consider cloudiness.
Wow, look at all that gray and just a few spots of blue. Most of the month was cloudy, which means blocking the warming sun from hitting the surface. And with all those clouds, let’s look at precipitation:
So, there were twenty-three days when it rained or snowed, including freezing rainstorms. Given what we know about the hydrology cycles, that means a lot of heat removed upward from the surface.
So the implications for March temperatures in my locale.
There you have it before your eyes. March is often the beginning of
spring weather, but this year was completely cold, frigid or freezing.
No sign of global warming around here.
Summary:
Claims of hottest this or that month or year are based on averages of averages of temperatures, which in principle is an intrinsic quality and distinctive to a locale. The claim involves selecting some places and time periods where warming appears, while ignoring other places where it has been cooling. Attribution studies select hot spots and exclude cold places, despite CO2 supposedly being evenly distributed.
Remember: They want you to panic. Before doing so, check out what the data says in your neck of the woods. For example, NOAA declared that “July 2024 was the warmest ever recorded for the globe.”
The best context for understanding decadal temperature changes comes from the world’s sea surface temperatures (SST), for several reasons:
Science Matters 