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TSS DEBUTS IN CHINESE:There is a temperature anomaly in Antarctica




Disclaimer: this article is not originally published on TSS official website. It is intended for STARSET_Mirror members.


With the warmest January on record in Antarctica in 2020, just one year after the continent’s coldest winter in 65 years, is global warming having an impact on the polar region?


The average temperature for the past April-September was minus 61 degrees Celsius, according to a record station on the Antarctic Plateau. Records have been kept since 1957, and this year’s record is arguably the lowest on record, 2.5 degrees Celsius cooler than the average for the last 30 years.


The record for the lowest temperature in the past 65 years was recorded in the winter of 1976, when the average temperature was -60.6 degrees Celsius. So why the unusual temperatures at the South Pole this year? Does this mean that climate change is, in fact, a discredited lie? What explains the unusual temperatures in Antarctica this winter?


This anomaly in the Antarctic climate system is in the stratosphere. When the Antarctic winter sets in, the sinking air gets trapped in the mountains of the Antarctic plateau, stops circulating, spins in place, and draws in cold air, creating a very powerful westward circulation around the poles that is part of the Antarctic atmospheric circulation.


Winds in the polar stratosphere have been stronger than usual this year, possibly because of a jet stream that has shifted poleward, scientists have observed. Not only that, too strong a polar vortex can cause a lot of ozone depletion in the stratosphere, which further intensifies the vortex.


Depleting ozone, a gas used to protect the ground from ultraviolet rays, the polar vortex could widen the ozone hole over Antarctica.


Normally, colder Temperatures in Antarctica mean more sea ice in the entire region. That may seem like a good thing in a warming climate, but will it last?


Despite an extremely cold winter in Antarctica, rapid ice melt is inevitable in the coming weeks. By the end of September, Antarctic sea ice was already at its lowest level visible for that time of year.


The earth’s polar regions are sensitive to climate change, and so change rapidly. Cold winters do not reduce the severity of climate change, or even contribute to global warming.


A cold Antarctic winter may seem like a straw to grab at in the face of global warming, but it still doesn’t help. A cold winter in Antarctica does not change the global warming trend. In the longer term, Antarctica, like the rest of the planet, is experiencing extreme warming and sea ice is disappearing at an unprecedented rate.


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