气候变化领域集成服务门户(CCPortal): Emergence of seasonal delay of tropical rainfall during 1979

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DOI	10.1038/s41558-021-01066-x
	Emergence of seasonal delay of tropical rainfall during 1979–2019
	Song F.; Leung L.R.; Lu J.; Dong L.; Zhou W.; Harrop B.; Qian Y.
发表日期	2021
ISSN	1758-678X
起始页码	605
结束页码	612
卷号	11 期号:7
英文摘要	Tropical rainfall exhibits a prominent annual cycle, with characteristic amplitude and phase representing the range between wet and dry seasons and their onset timing, respectively. Previous studies note enhanced amplitude over ocean and delayed phase over land in model projections of global warming, underpinned by first-order physical principles. However, it is unclear whether these changes have emerged in observations. Here we use gridded precipitation datasets to report a seasonal delay of 4.1 ± 1.1 and 4.2 ± 0.9 days (P < 0.05) during 1979–2019 over the northern tropical land and Sahel, respectively. Most of the delay is driven by external forcings, dominated by greenhouse gases (GHG) and anthropogenic aerosols (AER). Increasing GHG and decreasing AER in the recent decades delay rainfall by producing a moister atmosphere, thus increasing its lag in response to seasonal solar forcing. As GHG increase and AER decrease, these seasonal delays are projected to further amplify in the future. © 2021, The Author(s), under exclusive licence to Springer Nature Limited.
来源期刊	Nature Climate Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/237291
作者单位	Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA, United States
推荐引用方式 GB/T 7714	Song F.,Leung L.R.,Lu J.,等. Emergence of seasonal delay of tropical rainfall during 1979–2019[J],2021,11(7).
APA	Song F..,Leung L.R..,Lu J..,Dong L..,Zhou W..,...&Qian Y..(2021).Emergence of seasonal delay of tropical rainfall during 1979–2019.Nature Climate Change,11(7).
MLA	Song F.,et al."Emergence of seasonal delay of tropical rainfall during 1979–2019".Nature Climate Change 11.7(2021).