气候变化领域集成服务门户(CCPortal): Effects of Amazon basin deforestation on regional atmospheric circulation and water vapor transport towards tropical South America

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DOI	10.1007/s00382-020-05223-4
	Effects of Amazon basin deforestation on regional atmospheric circulation and water vapor transport towards tropical South America
	Ruiz-Vásquez M.; Arias P.A.; Martínez J.A.; Espinoza J.C.
发表日期	2020
ISSN	0930-7575
起始页码	4169
结束页码	4189
卷号	54
英文摘要	The water cycle over the Amazon basin is a regulatory mechanism for regional and global climate. The atmospheric moisture evaporated from this basin represents an important source of humidity for itself and for other remote regions. The deforestation rates that this basin has experienced in the past decades have implications for regional atmospheric circulation and water vapor transport. In this study, we analyzed the changes in atmospheric moisture transport towards tropical South America during the period 1961–2010, according to two deforestation scenarios of the Amazon defined by Alves et al. (Theor Appl Climatol 100(3-4):337–350, 2017). These scenarios consider deforested areas of approximately 28% and 38% of the Amazon basin, respectively. The Dynamic Recycling Model is used to track the transport of water vapor from different sources in tropical South America and the surrounding oceans. Our results indicate that under deforestation scenarios in the Amazon basin, continental sources reduce their contributions to northern South America at an annual scale by an average of between 40 and 43% with respect to the baseline state. Our analyses suggest that these changes may be related to alterations in the regional Hadley and Walker cells. Amazon deforestation also induces a strengthening of the cross-equatorial flow that transports atmospheric moisture from the Tropical North Atlantic and the Caribbean Sea to tropical South America during the austral summer. A weakening of the cross-equatorial flow is observed during the boreal summer, reducing moisture transport from the Amazon to latitudes further north. These changes alter the patterns of precipitable water contributions to tropical South America from both continental and oceanic sources. Finally, we observed that deforestation over the Amazon basin increases the frequency of occurrence of longer dry seasons in the central-southern Amazon (by between 29 and 57%), depending on the deforestation scenario considered, as previous studies suggest. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Amazon deforestation; Atmospheric circulation; Tropical South America; Water vapor transport
语种	英语
scopus关键词	atmospheric circulation; atmospheric moisture; atmospheric transport; deforestation; global climate; hydrological cycle; summer; water vapor; Atlantic Ocean; Atlantic Ocean (North); Caribbean Sea; South America
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145479
作者单位	Universidad de Antioquia, Medellín, Antioquia, Colombia; Université Grenoble Alpes, IRD, CNRS, Grenoble INP, Insitut des Géosciences de l’Environnement (IGE, UMR 5001), Grenoble, 38000, France
推荐引用方式 GB/T 7714	Ruiz-Vásquez M.,Arias P.A.,Martínez J.A.,et al. Effects of Amazon basin deforestation on regional atmospheric circulation and water vapor transport towards tropical South America[J],2020,54.
APA	Ruiz-Vásquez M.,Arias P.A.,Martínez J.A.,&Espinoza J.C..(2020).Effects of Amazon basin deforestation on regional atmospheric circulation and water vapor transport towards tropical South America.Climate Dynamics,54.
MLA	Ruiz-Vásquez M.,et al."Effects of Amazon basin deforestation on regional atmospheric circulation and water vapor transport towards tropical South America".Climate Dynamics 54(2020).