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. Moreover, the UAH record shows that the effects of the last one are now gone as of January 2021. Updated to March 2021 (UAH baseline is now 1990-2020)
The 2016 El Nino persisted longer than 1998, and was followed by warming after effects in NH. The monthly anomaly as 2021 begins is matching the 0.04C average since 1995, an ENSO neutral year prior to the second warming event discussed above. With a quiet sun and cooling oceans, the prospect is for cooler times ahead.
Postscript: Article by Dr. Arnd Bernaerts regarding ENSO and Climate Models
At Oceans Govern Climate Arnd writes Instead of El Niño, La Niña 2020/21 came.
He summarizes in this way (in italics with my bolds):
Although ENSO is a long-known climate phenomenon, climatologists still follow the view of the meteorologists 100 years ago, according to which the atmosphere is at the center of all-weather events. They are generously willing to acknowledge that the oceans play an important role, but not that ocean temperatures and their contribution to atmospheric humidity are the most crucial factors. This can be seen in the example of ENSO. Although small in oceanic proportions, the weather above can have long distance effects. Once it happen, e.g. due to a lack of trade winds, the triggering cause remains the changes in equatorial water temperatures.
The attempt to use computer models and weather observation data, by atmosphere-ocean coupling, ENSO forecasts failed with the 2020/2021 forecast and will not achieve what would be necessary in the future either.
What is needed is twofold: (a) much more ocean data , and (b) acknowledging the supremacy of the oceans in climatic change matters.
No ocean area is as intensive observed as the Equatorial Eastern Pacific (EEP), well over 40 years. Since recently the Tropical Pacific Observing System, TPOS 2020, sustained sampling network is the “backbone” of the system, (Details: WMO). Whether this system can even provide nearly enough oceanic data to make predictions about what is going on under the sea surface cannot be judged here, but it is unlikely and for a long time.
So the other problem remains, the climatologists’ narrow view on the atmosphere. The authors of the El Nino forecast for 2020/21 failed because they lacked the insight that without comprehensive marine data, their model calculations are at best speculations. At least this conclusion should be drawn from their dramatic false prognosis.
In conclusion climatology should realize, that any ocean space, whether in size of a few hundred square miles or as covered by ENSO, plays an important role in climate matters, and that the latter should be regarded as a gift, to understand the mechanism quicker, on who is driving the climate.