New Study Finds East And West Antarctica Have Profoundly Cooled By -2.8°C And -1.68°C Since 1979

From 1979-2018 East Antarctica cooled -0.70°C/decade (-2.8°C), West Antarctica cooled -0.42°C/decade (-1.68°C), but the Antarctic Peninsula warmed 0.18°C/decade (0.72°C). Thus, as a whole, the Antarctic continent has cooled by about -1.5°C to -2°C during the same period CO2 rose from 337 to 410 ppm.

Zhu et al., 2021

“The temperature trend from ERA5 is consistent with that from observations, in which a cooling trend dominates East Antarctica and West Antarctica, while a warming trend exists in the Antarctic Peninsula except during austral summer.”

“The trends in ERA reanalyses and observations are all negative in East Antarctica in all annual and seasons, and the fastest cooling trend appears in MAM, and the cooling rate of this season is more than 1 °C per decade. In West Antarctica, the ERA5 trends are similar to observation trends, whereas there is a difference between ERA5 trends and ERA-Interim in SON, as reflected in a warming trend in ERA-Interim while a cooling trend is observed in ERA5. ERA5 exhibits a significant cooling trend in annual data, MAM, and JJA, and the trends from ERA-Interim always fail to pass the significance test.”

“It is also worth mentioning that the ERA5 shows a faster cooling rate than ERA-Interim and observations in West Antarctica. Over the Antarctic Peninsula, trends of annual and seasonal temperature means in ERA reanalyses and observations are not significant. ERA5 presents a warming trend with the exception of DJF, as is the case for ERA-Interim and station records.”

20 responses to “New Study Finds East And West Antarctica Have Profoundly Cooled By -2.8°C And -1.68°C Since 1979”

Hatter Eggburn 27. July 2021 at 1:18 AM | Permalink

Where Antarctica 🇦🇶 goes, the world tends to follow.
Interested 27. July 2021 at 2:12 PM | Permalink

In 2017, scientists at The University of Edinburgh, Scotland, discovered the world’s largest volcanic province under West Antarctica and the Antarctic Peninsula – with over 90 volcanoes detected, ranging in height from some 100 metres up to nearly 4000 metres.
It’s surely safe to assume that enormous quantities of heat must emanate from it and thus help to mitigate cooling in that region of the continent.
Presumably, West Antarctica would also have cooled by -2.8°C if not for the natural ‘underfloor heating’ provided by Mother Nature!

The north polar cap is only 3 million years old in its current incarnation, and it’s a transient thing. It increases and decreases in accordance with our planet’s orbital status, our axial tilt, and with periodic changes in the Sun. And CO2 – natural or manmade – has little to do with it.
But the south polar cap is over 30 million years old and is probably a better bellwether for global trends. The fact that Antarctica’s temperature’s dropped so much lately, in such a relatively short time, may be telling us something very important about where Earth’s climate is going … and how fast it’s going there.
1. Kenneth Richard 28. July 2021 at 10:45 AM | Permalink
  
  “The north polar cap is only 3 million years old”
  
  Actually, Greenland melted to the ground as recently as 400,000 years ago per a 2021 study regarding the Camp Century site.
  
  And for about 280,000 years of the Pleistocene, Greenland was ice free.
  
  https://notrickszone.com/2020/06/22/greenlands-kilometers-thick-ice-sheet-routinely-disappears-ice-free-when-co2-levels-hover-below-280-ppm/
  1. Interested 1. August 2021 at 6:21 AM | Permalink
    
    Yes. Good info. Thanks for the details, Kenneth.
    
    As everyone here probably knows, geologically speaking, any period in which Earth has a permanent ice cap at EITHER pole is classified as an ice-age. So, we’ve been in an ice-age continually since Antarctica became ice-bound roughly 34 million years ago.
    Having an ice cap at BOTH poles at the same time is very unusual and indicates the world is generally much colder than normal. But this fact is totally lost on today’s benighted climate warriors, of course.
    
    And the last glacial period – representing the most recent advance of the transient north polar ice cap – is often erroneously described as the last ‘ice-age’, which I think only serves to cloud the issue in the minds of most people.
    I think it also makes people imagine that today’s climate is the norm and the ‘ice-age’ (ending approx. 10,000 years ago) was an anomaly which they can safely ignore and consign to the dim and distant past.
    For this reason, most people are blissfully unaware that in fact our present interglacial is really the brief anomaly, and ferociously cold glacials lasting 10 times longer are actually the ‘normal’ climate.
    I’m sure the average punter wouldn’t be nearly so concerned about a modest 0.8°C rise in average global temperature since 1850 if s/he only knew what we can expect to happen when our current, balmy, Holocene interglacial comes to a close … and maybe quite soon now!
Colin Smith 27. July 2021 at 3:31 PM | Permalink

It’s worse than we thought!
DMA 27. July 2021 at 5:48 PM | Permalink

One of the things about Antarctica is the lack of water vapor in the air making it the best environment to test CO2 warming theory. The increased CO2 doesn’t seem to have warmed it up at all. This is enough evidence to falsify the hypothesis that adding CO2 to the atmosphere will warm it.
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