气候变化领域集成服务门户(CCPortal): The Decadal Reduction of Southeastern Australian Autumn Rainfall since the Early 1990s: A response to sea surface temperature warming in the subtropical South Pacific

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DOI	10.1175/JCLI-D-19-0686.1
	The Decadal Reduction of Southeastern Australian Autumn Rainfall since the Early 1990s: A response to sea surface temperature warming in the subtropical South Pacific
	Zhongda L.I.N.; Yun L.I.; Yong L.I.U.; Aixue H.U.
发表日期	2020
ISSN	0894-8755
起始页码	2249
结束页码	2261
卷号	33 期号:6
英文摘要	Rainfall in southeastern Australia (SEA) decreased substantially in the austral autumn (March–May) of the 1990s and 2000s. The observed autumn rainfall reduction has been linked to the climate change–induced poleward shift of the subtropical dry zone across SEA and natural multidecadal variations. However, the underlying physical processes responsible for the SEA drought are still not fully understood. This study highlights the role of sea surface temperature (SST) warming in the subtropical South Pacific (SSP) in the autumn rainfall reduction in SEA since the early 1990s. The warmer SSP SST enhances rainfall to the northwest in the southern South Pacific convergence zone (SPCZ); the latter triggers a divergent overturning circulation with the subsidence branch over the eastern coast of Australia. As such, the subsidence increases the surface pressure over Australia, intensifies the subtropical ridge, and reduces the rainfall in SEA. This mechanism is further confirmed by the result of a sensitivity experiment using an atmospheric general circulation model. Moreover, this study further indicates that global warming and natural multidecadal variability contribute approximately 44% and 56%, respectively, of the SST warming in the SSP since the early 1990s. © 2020 American Meteorological Society.
英文关键词	Atmospheric temperature; Global warming; Rain; Submarine geophysics; Subsidence; Surface properties; Surface waters; Tropics; Atmospheric general circulation models; Multidecadal variability; Multidecadal variations; Overturning circulation; Sea surface temperature (SST); South pacific convergence zones; South-eastern Australia; Subtropical ridge; Oceanography; climate change; climate modeling; numerical model; rainfall; regional climate; sea surface temperature; sensitivity analysis; Australia; Pacific Ocean; Pacific Ocean (South)
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171392
作者单位	State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Business Intelligence and Data Analytics, Western Power, Perth, WA, Australia; Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Climate and Global Dynamics Laboratory, National Center for Atmospheric Research, Boulder, CO, United States
推荐引用方式 GB/T 7714	Zhongda L.I.N.,Yun L.I.,Yong L.I.U.,et al. The Decadal Reduction of Southeastern Australian Autumn Rainfall since the Early 1990s: A response to sea surface temperature warming in the subtropical South Pacific[J],2020,33(6).
APA	Zhongda L.I.N.,Yun L.I.,Yong L.I.U.,&Aixue H.U..(2020).The Decadal Reduction of Southeastern Australian Autumn Rainfall since the Early 1990s: A response to sea surface temperature warming in the subtropical South Pacific.Journal of Climate,33(6).
MLA	Zhongda L.I.N.,et al."The Decadal Reduction of Southeastern Australian Autumn Rainfall since the Early 1990s: A response to sea surface temperature warming in the subtropical South Pacific".Journal of Climate 33.6(2020).