Roles of anthropogenic forcings in the observed trend of decreasing late-summer precipitation over the East Asian transitional climate zone

Abstract Observations indicate that late-summer precipitation over the East Asian transitional climate zone (TCZ) showed a pronounced decreasing trend during 1951–2005. This study examines the relative contributions of anthropogenic [including anthropogenic aerosol (AA) and greenhouse gas (GHG)] and...

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Autores principales:	Wei Zhao, Wen Chen, Shangfeng Chen, Hainan Gong, Tianjiao Ma
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/20da8f9b372e4f5a89400b57565e212f
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spelling	oai:doaj.org-article:20da8f9b372e4f5a89400b57565e212f2021-12-02T11:37:26ZRoles of anthropogenic forcings in the observed trend of decreasing late-summer precipitation over the East Asian transitional climate zone10.1038/s41598-021-84470-92045-2322https://doaj.org/article/20da8f9b372e4f5a89400b57565e212f2021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-84470-9https://doaj.org/toc/2045-2322Abstract Observations indicate that late-summer precipitation over the East Asian transitional climate zone (TCZ) showed a pronounced decreasing trend during 1951–2005. This study examines the relative contributions of anthropogenic [including anthropogenic aerosol (AA) and greenhouse gas (GHG)] and natural forcings to the drying trend of the East Asian TCZ based on simulations from CMIP5. The results indicate that AA forcing plays a dominant role in contributing to the drying trend of the TCZ. AA forcing weakens the East Asian summer monsoon via reducing the land-sea thermal contrast, which induces strong low-level northerly anomalies over eastern China, suppresses water vapor transport from southern oceans and results in drier conditions over the TCZ. In contrast, GHG forcing leads to a wetting trend in the TCZ by inducing southerly wind anomalies, thereby offsetting the effect of the AA forcing. Natural forcing has a weak impact on the drying trend of the TCZ due to the weak response of atmospheric anomalies.Wei ZhaoWen ChenShangfeng ChenHainan GongTianjiao MaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Wei Zhao Wen Chen Shangfeng Chen Hainan Gong Tianjiao Ma Roles of anthropogenic forcings in the observed trend of decreasing late-summer precipitation over the East Asian transitional climate zone
description	Abstract Observations indicate that late-summer precipitation over the East Asian transitional climate zone (TCZ) showed a pronounced decreasing trend during 1951–2005. This study examines the relative contributions of anthropogenic [including anthropogenic aerosol (AA) and greenhouse gas (GHG)] and natural forcings to the drying trend of the East Asian TCZ based on simulations from CMIP5. The results indicate that AA forcing plays a dominant role in contributing to the drying trend of the TCZ. AA forcing weakens the East Asian summer monsoon via reducing the land-sea thermal contrast, which induces strong low-level northerly anomalies over eastern China, suppresses water vapor transport from southern oceans and results in drier conditions over the TCZ. In contrast, GHG forcing leads to a wetting trend in the TCZ by inducing southerly wind anomalies, thereby offsetting the effect of the AA forcing. Natural forcing has a weak impact on the drying trend of the TCZ due to the weak response of atmospheric anomalies.
format	article
author	Wei Zhao Wen Chen Shangfeng Chen Hainan Gong Tianjiao Ma
author_facet	Wei Zhao Wen Chen Shangfeng Chen Hainan Gong Tianjiao Ma
author_sort	Wei Zhao
title	Roles of anthropogenic forcings in the observed trend of decreasing late-summer precipitation over the East Asian transitional climate zone
title_short	Roles of anthropogenic forcings in the observed trend of decreasing late-summer precipitation over the East Asian transitional climate zone
title_full	Roles of anthropogenic forcings in the observed trend of decreasing late-summer precipitation over the East Asian transitional climate zone
title_fullStr	Roles of anthropogenic forcings in the observed trend of decreasing late-summer precipitation over the East Asian transitional climate zone
title_full_unstemmed	Roles of anthropogenic forcings in the observed trend of decreasing late-summer precipitation over the East Asian transitional climate zone
title_sort	roles of anthropogenic forcings in the observed trend of decreasing late-summer precipitation over the east asian transitional climate zone
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/20da8f9b372e4f5a89400b57565e212f
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Roles of anthropogenic forcings in the observed trend of decreasing late-summer precipitation over the East Asian transitional climate zone

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