Arctic sea-ice loss intensifies the aerosol transport to the Tibetan Plateau
The Tibetan Plateau (TP) has recently been polluted by strong anthropogenic emissions from South Asia. However, the mechanisms controlling the atmospheric circulations conducive to the aerosol transport to the TP are poorly understood. Here we show that winter loss of Arctic sea-ice over the sub-pol...
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5020438 2023-07-30T04:01:15+02:00 Arctic sea-ice loss intensifies the aerosol transport to the Tibetan Plateau Li, F. Wan, X. Wang, H. Orsolini, Y. Cong, Z. Kang, S. 2023-07-11 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020438 eng eng info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-3534 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020438 XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) info:eu-repo/semantics/conferenceObject 2023 ftgfzpotsdam https://doi.org/10.57757/IUGG23-3534 2023-07-09T23:40:17Z The Tibetan Plateau (TP) has recently been polluted by strong anthropogenic emissions from South Asia. However, the mechanisms controlling the atmospheric circulations conducive to the aerosol transport to the TP are poorly understood. Here we show that winter loss of Arctic sea-ice over the sub-polar North Atlantic boosts the aerosol delivery toward the TP in April, when the aerosol loading is at its climatological maximum, preceding the Indian summer monsoon onset. Low sea-ice in February weakens the polar jet, which leads to the decreased Ural snowpack through a lessened transport of oceanic air. The decreased snowpack persisting to April reinforces the Ural pressure ridge and the East Asian trough, parts of a quasi-stationary Rossby wavetrain extending across Eurasia. These conditions facilitate the enhanced subtropical westerly jet at the southern edge of the TP, invigorating upslope wind combined with mesoscale updrafts wafting upstream emissions over the Himalayas onto the TP. Conference Object Arctic North Atlantic Sea ice GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Arctic Indian |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
English |
description |
The Tibetan Plateau (TP) has recently been polluted by strong anthropogenic emissions from South Asia. However, the mechanisms controlling the atmospheric circulations conducive to the aerosol transport to the TP are poorly understood. Here we show that winter loss of Arctic sea-ice over the sub-polar North Atlantic boosts the aerosol delivery toward the TP in April, when the aerosol loading is at its climatological maximum, preceding the Indian summer monsoon onset. Low sea-ice in February weakens the polar jet, which leads to the decreased Ural snowpack through a lessened transport of oceanic air. The decreased snowpack persisting to April reinforces the Ural pressure ridge and the East Asian trough, parts of a quasi-stationary Rossby wavetrain extending across Eurasia. These conditions facilitate the enhanced subtropical westerly jet at the southern edge of the TP, invigorating upslope wind combined with mesoscale updrafts wafting upstream emissions over the Himalayas onto the TP. |
format |
Conference Object |
author |
Li, F. Wan, X. Wang, H. Orsolini, Y. Cong, Z. Kang, S. |
spellingShingle |
Li, F. Wan, X. Wang, H. Orsolini, Y. Cong, Z. Kang, S. Arctic sea-ice loss intensifies the aerosol transport to the Tibetan Plateau |
author_facet |
Li, F. Wan, X. Wang, H. Orsolini, Y. Cong, Z. Kang, S. |
author_sort |
Li, F. |
title |
Arctic sea-ice loss intensifies the aerosol transport to the Tibetan Plateau |
title_short |
Arctic sea-ice loss intensifies the aerosol transport to the Tibetan Plateau |
title_full |
Arctic sea-ice loss intensifies the aerosol transport to the Tibetan Plateau |
title_fullStr |
Arctic sea-ice loss intensifies the aerosol transport to the Tibetan Plateau |
title_full_unstemmed |
Arctic sea-ice loss intensifies the aerosol transport to the Tibetan Plateau |
title_sort |
arctic sea-ice loss intensifies the aerosol transport to the tibetan plateau |
publishDate |
2023 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020438 |
geographic |
Arctic Indian |
geographic_facet |
Arctic Indian |
genre |
Arctic North Atlantic Sea ice |
genre_facet |
Arctic North Atlantic Sea ice |
op_source |
XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-3534 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020438 |
op_doi |
https://doi.org/10.57757/IUGG23-3534 |
_version_ |
1772812004699930624 |