The Sudden Stratospheric Warming Events in the Antarctic in 2024

IF 4.6 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Geophysical Research Letters Pub Date : 2025-04-02 DOI:10.1029/2025GL115257

Yucheng Zi, Zhenxia Long, Jinyu Sheng, Gaopeng Lu, Will Perrie, Ziniu Xiao

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Abstract

In July and August 2024, two consecutive stratospheric sudden warming (SSW) events (termed SW07 and SW08) occurred over Antarctic, both featuring a rapid 17°C temperature rise at 10 hPa and significant stratospheric polar vortex (SPV) deceleration. SW07 occurred at the earliest winter time of the year recorded in the satellite era (1979 to present). The study found that, strong blocking highs affected stratospheric warming via nonlinear planetary wave prior to SW07, and the substantial sea ice loss over Antarctic Ross Sea and Amundsen Sea likely created favorable conditions for the formation of these blocking highs. Furthermore, the stratospheric preconditioning significantly amplified the intensity of the planetary waves. A downward-propagating negative Southern Annular Mode (SAM) signal after SW07 supported blocking highs, creating a favorable circulation for planetary wave perturbations prior to SW08. In addition, enhanced ozone transport from low latitudes to the pole during SW07 and SW08 contributed to ozone recovery.

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2024年南极平流层突然变暖事件

2024年7月和8月，南极发生了连续两次平流层突然变暖事件（SW07和SW08），均表现为10 hPa温度快速上升17°C和平流层极涡（SPV）明显减速。SW07发生在卫星时代（1979年至今）记录的一年中最早的冬季。研究发现，在SW07之前，强阻塞高压通过非线性行星波影响平流层变暖，而南极罗斯海和阿蒙森海的大量海冰损失可能为这些阻塞高压的形成创造了有利条件。此外，平流层的预调节显著地放大了行星波的强度。SW07之后向下传播的负南环模（SAM）信号支持阻塞高，为SW08之前的行星波扰动创造了有利的环流。此外，在SW07和SW08期间，低纬度向极的臭氧输送增强有助于臭氧恢复。

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来源期刊

Geophysical Research Letters 地学-地球科学综合

CiteScore

9.00

自引率

9.60%

发文量

1588

审稿时长

2.2 months

期刊介绍： Geophysical Research Letters (GRL) publishes high-impact, innovative, and timely research on major scientific advances in all the major geoscience disciplines. Papers are communications-length articles and should have broad and immediate implications in their discipline or across the geosciences. GRLmaintains the fastest turn-around of all high-impact publications in the geosciences and works closely with authors to ensure broad visibility of top papers.