The Pause lengthens yet again, and this time by three months. The double-dip la Niña is now manifesting itself in the UAH data, so that there has been no global warming for 7 years 3 months, up from 7 years on the basis of the previous monthly data.
The Version 6.0 global average lower tropospheric temperature (LT) anomaly for March, 2021 has come in at -0.01 deg. C below the 30-year baseline, down from the February, 2021 value of +0.20 deg. C, and down substantially (approx. 0.6C deg. C) from where we were around a year ago.
A continuation of this downward plunge is highly probable over the coming months (with the odd bump along the way–climate is cyclic after all) as low solar activity and La Nina conditions persist.
According to the 15x NASA/NOAA AMSU satellites that measure every square inch of the lower troposphere (where us humans reside), planet Earth was actually warmer back in 1983:
In addition, the global average oceanic tropospheric temperature anomaly is -0.07 deg. C–the lowest since November 2013. Also, the tropical (20N-20S) departure from average is -0.29 deg. C–the coolest since June of 2012. While Australia, at -0.79 deg. C, is the coolest reading since August 2014.
Bottom line, the Grand Solar Minimum is intensifying — and fast.
Sunspots (a great barometer for solar activity) have remained sparse in 2021, even at a time when the next the next solar cycle (25) should be firing-up.
The Solar Minimum of cycle 24 began bottoming-out way back in late-2017, and went on to develop into the deepest minimum of the past 100+ years — and it is still proving reluctant to release its grip:
Global climate trend since Dec. 1 1978: +0.13 C per decade
September Temperatures (preliminary)
Global composite temp.: +0.61 C (+1.10 °F) above seasonal average
Northern Hemisphere.: +0.64 C (+1.15 °F) above seasonal average
Southern Hemisphere.: +0.58 C (+1.00°F) above seasonal average
Tropics.: +0.60 C (+1.08°F) above seasonal average
August Temperatures (final)
Global composite temp.: +0.38 C (+0.68 °F) above seasonal average
Northern Hemisphere.: +0.33 C (+0.59 °F) above seasonal average
Southern Hemisphere.: +0.44 C (+0.79°F) above seasonal average
Tropics.: +0.45 C (+0.81 °F) above seasonal average
Notes on data released October 3, 2019 (v6.0)
September’s globally-averaged, bulk-layer atmospheric temperature anomaly of +0.61°C (+1.10°F) represented the warmest September reading of the past 41 Septembers in our satellite record. The jump from August was substantial (+0.23°C) and ranks among the largest month-to-month changes. (Several previous jumps were greater than 0.3°C however.) The warmth was global in extent with warmest September temperatures posted for both hemispheres and the tropical belt. This month-to-month heating is possibly related, at least in part, to the tropical Pacific Ocean’s loss of heat energy to the atmosphere in the recent months as El Niño conditions declined.
Alternate Title: The Annual Cycle in Global Land+Ocean Surface Temperature IS Far Greater Than 1.5 Deg C, AND Much-Much-MUCH Greater Than 1.5 Deg C Annually for Global Land Air Surface Temperatures
We all were taught early in school that the Earth orbits the Sun…that its path is elliptical…that because of the tilt in Earth’s axis of rotation, we have seasons as the Earth orbits our star annually. Because of the elliptical orbit, and because the ratios of land to ocean are different between the Northern and Southern Hemispheres, we might expect that global average surface temperatures would vary over the course of a year.
Later in life we’ve been brow beaten with alarmism about human-induced global warming and climate change…that the Earth will become a literal—not figurative—hell if global surface temperatures rise—formerly 2-deg C—now 1.5 deg C above pre-industrial levels. But does the average person know much global surface temperatures vary annually as it orbits the Sun? It’s unlikely, because I’ve never before seen graphs that are similar to what’s presented in this post or seen it discussed in any of the global warming literature. Am I expecting most persons to find this information to be of any interest? Nope. I simply find it noteworthy that, as I mentioned before, I’ve never seen it presented anywhere. In fact, I just Googled, in quotes, “How Much Do Global Surface Temperatures Cycle Annually?” and Google replied (their boldface), “No results found for “How Much Do Global Surface Temperatures Cycle Annually?”.
Remarkable, is it not, in these times of global warming interest?
Enough with the preamble and on to the meat of the post:
La géologie, une science plus que passionnante … et diverse