https://quadrant.org.au/opinion/doomed-planet/2021/10/dont-notice-the-antarctic-temperature-reord/
Last winter, in one of the bleakest places on earth after Canberra and Belushya Guba, a novel hypothesis was proposed by a rogue researcher in lockdown: the more anthropogenic hot air spoken in the northern hemisphere before a United Nations climate conference, the colder it becomes in the southern hemisphere, especially at the South Pole.
The conjecture has yet to be validated by a peer-reviewed article in Nature Climate Change. Nevertheless, a lot of people – especially the self-appointed guardians of truth who call out “fake news” and “misinformation” — hope it never reaches that learned journal, and certainly not the smartphones or Twitter accounts of apoplectic activists and hysterical weather-worriers. They would prefer it just goes away and does not linger like a bad smell; or is buried deep under Antarctic snow and ice, with or without the perpetrator, before the Conference of the Parties (COP 26) begins in Glasgow-on-Clyde in November, with or without President Xi (editor’s note: Xi isn’t going, preferring to laugh at the participants from a distance.)
Yet the supporting evidence is impressive.
As for the second part, global warming took a long winter vacation, at least in Antarctica.
The Antarctic interior recorded its coldest April-to-September this year since records began in 1957. According to the US National Snow and Ice Data Centre (NSIDC), the average temperature at the US Amundsen-Scott South Pole Station was minus 60.9ºC for the six months. It was also the station’s second-coldest winter (June, July and August) on record, with an average seasonal temperature of minus 62.9ºC. This was an extraordinary 3.4ºC below the long-term average (1881-2010) for winter.
Antarctic sea ice extent also was above average for several months. In late August it was the fifth-highest in the 43-year satellite record. The maximum observed on September 1 was 18.75 million square kilometres (7.24 million square miles, over twice the size of Australia) and the second-earliest seasonal maximum in the satellite record. Ironically, it was “relatively cool” near the North Pole last summer, compared to recent years, which allowed September’s ice extent to be the highest since 2014.
On Thursday, September 30, climatologist Maximiliano Herrera tweeted:
Exceptional cold in the Antarctic Plateau. The Russian Base of Vostok on 30 September dropped to a min. temperature of -79.4C, which is only 0.6C above the world lowest temperature ever recorded in October (recorded at the former Plateau Station, also in Antarctica).
The jury is still out on precisely what caused the cold snap and its significance. According to NSIDC:
the unusual cold was attributed to two extended periods of stronger-than-average encircling winds around the continent, which tend to isolate the ice sheet from warmer conditions. A strong upper-atmosphere polar vortex was observed as well. (NSIDC, October 5, 2021)