Reduced aerosol transport from South Asia to the Tibetan Plateau following the January 2021 sudden stratospheric warming event

IF 8.1 1区地球科学 Q1 ENVIRONMENTAL SCIENCES

Communications Earth & Environment Pub Date : 2024-11-15 DOI:10.1038/s43247-024-01889-4

Yuling Hu, Haipeng Yu, Shichang Kang, Mian Xu, Siyu Chen, Junhua Yang, Xintong Chen, Jixiang Li

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引用次数: 0

Abstract

Aerosols from South Asia directly enhance glacier melt over the Tibetan Plateau. While the transboundary transport of aerosols from South Asia towards the Tibetan Plateau has been extensively investigated from a tropospheric perspective, less focus has been given to the stratospheric dimension. Here we examined the impact of the sudden stratospheric warming in January 2021 on aerosol transport from South Asia towards the Tibetan Plateau via numerical simulation. The results revealed that the aerosol transport from South Asia to the Tibetan Plateau reduced by 30%–40% following the January 2021 sudden stratospheric warming event. The eastward-propagating wave train stimulated by the stratospheric sudden warming induced an anticyclonic anomaly from the Persian Gulf to northern China, south of which easterly anomalies hindered the aerosol transport from South Asia to the Plateau. This study provides valuable insights for predicting air quality over the Tibetan Plateau. Following a sudden stratospheric warming event in 2021, transport of aerosols from South Asia to the Tibetan Plateau was suppressed as a result of changes in the tropospheric circulation, according to analyses with a weather forecasting model with a chemistry component.

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2021 年 1 月平流层突然变暖事件后南亚到青藏高原的气溶胶迁移减少

来自南亚的气溶胶直接加剧了青藏高原的冰川融化。虽然从对流层的角度对南亚气溶胶向青藏高原的跨境传输进行了广泛的研究，但对平流层方面的研究关注较少。在此，我们通过数值模拟研究了 2021 年 1 月平流层突然变暖对气溶胶从南亚向青藏高原传输的影响。结果表明，2021年1月平流层突然变暖事件发生后，从南亚向青藏高原的气溶胶输送减少了30%-40%。平流层骤暖激发的向东传播波列诱发了从波斯湾到中国北部的反气旋异常，其南侧的偏东异常阻碍了气溶胶从南亚向青藏高原的输送。这项研究为预测青藏高原的空气质量提供了宝贵的见解。在 2021 年平流层突然变暖事件之后，由于对流层环流的变化，气溶胶从南亚向青藏高原的传输受到了抑制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Communications Earth & Environment Earth and Planetary Sciences-General Earth and Planetary Sciences

CiteScore

8.60

自引率

2.50%

发文量

269

审稿时长

26 weeks

期刊介绍： Communications Earth & Environment is an open access journal from Nature Portfolio publishing high-quality research, reviews and commentary in all areas of the Earth, environmental and planetary sciences. Research papers published by the journal represent significant advances that bring new insight to a specialized area in Earth science, planetary science or environmental science. Communications Earth & Environment has a 2-year impact factor of 7.9 (2022 Journal Citation Reports®). Articles published in the journal in 2022 were downloaded 1,412,858 times. Median time from submission to the first editorial decision is 8 days.