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American Focus > Blog > Tech and Science > Atmospheric chaos has sent temperatures soaring in Antarctica
Tech and Science

Atmospheric chaos has sent temperatures soaring in Antarctica

Last updated: September 28, 2025 5:16 pm
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Antarctica is experiencing unprecedented warmth

Eyal Bartov / Alamy

The atmospheric conditions above Antarctica have dramatically shifted since early September, with temperatures soaring by over 35°C (63°F). Concurrently, wind speeds have plummeted to half their typical rates, and an unusual stall in ozone depletion has been detected.

This rare climatic disruption, which historically occurs once every couple of decades, is becoming increasingly frequent, raising concerns among climate scientists. Martin Jucker from the University of New South Wales points out that four of these significant atmospheric events have taken place in just under 25 years.

Typically, atmospheric temperatures over Antarctica hover around -55°C (-67°F). However, since September 5, they have skyrocketed to -20°C (-4°F). Despite still being below freezing, this shift has caused stratospheric wind patterns, particularly the polar vortex, to weaken significantly, reducing speeds to around 100 kilometers per hour (62 mph).

While this warming has not yet reached the criteria for a “sudden stratospheric warming” event, Jucker cautions that the ramifications for the southern hemisphere could be substantial moving into the coming months.

Initially, Australian meteorologists forecasted a wetter-than-normal spring, but they have now shifted their predictions to warn of the likelihood of strong westerly winds across the Australian continent, potentially resulting in warmer and drier conditions.

As the situation continues to evolve, Jucker outlines two possible outcomes: the polar vortex may stabilize, allowing atmospheric temperatures to revert to their average rates, or the anomaly could persist, with predictions of an additional temperature increase of up to 20°C (36°F). This escalation could lead to extreme weather events in the southern hemisphere’s northern latitudes.

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Although the precise cause of this anomaly isn’t fully understood, Jucker suspects it is intricately tied to rising sea surface temperatures from climate change, which have increased by approximately 1°C (1.8°F) to 2°C (3.6°F) across the Pacific. Moreover, recent occurrences of massive typhoons in the Pacific align with these heightened sea surface temperatures, contributing to an overall trend of unusual weather patterns observed over the previous two years.

Edward Doddridge from the University of Tasmania expresses concern over the continuing extreme changes in Antarctica. He highlights a troubling trend involving significant sea ice loss, intense heatwaves, breeding failures among emperor penguins, and a notable slowdown in the Antarctic overturning circulation.

“Antarctica keeps amazing us,” says Doddridge. “Each of these shifts presents its own set of challenges, but my primary concern revolves around the emerging changes that not only reinforce existing conditions but cascade across various aspects of the Antarctic environment.”

He elaborates that summer sea ice loss intensifies the disintegration of ice shelves, leading to ocean warming that further accelerates ice shelf melt and disrupts the Antarctic overturning circulation.

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TAGGED:AntarcticaAtmosphericChaossoaringtemperatures
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