气候变化领域集成服务门户(CCPortal): Influences of local and remote conditions on tropical precipitation and its response to climate change

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DOI	10.1175/JCLI-D-19-0450.1
	Influences of local and remote conditions on tropical precipitation and its response to climate change
	Saint-Lu M.; Chadwick R.; Hugo Lambert F.; Collins M.; Boutle I.; Whitall M.; Daleu C.
发表日期	2020
ISSN	0894-8755
起始页码	4045
结束页码	4063
卷号	33 期号:10
英文摘要	By comparing a single-column model (SCM) with closely related general circulation models (GCMs), precipitation changes that can be diagnosed from local changes in surface temperature (TS) and relative humidity (RHS) are separated from more complex responses. In the SCM setup, the large-scale tropical circulation is parameterized to respond to the surface temperature departure from a prescribed environment, following the weak temperature gradient (WTG) approximation and using the damped gravity wave (DGW) parameterization. The SCM is also forced with moisture variations. First, it is found that most of the present-day mean tropical rainfall and circulation pattern is associated with TS and RHS patterns. Climate change experiments with the SCM are performed, imposing separately surface warming and CO2 increase. The rainfall responses to future changes in sea surface temperature patterns and plant physiology are successfully reproduced, suggesting that these are direct responses to local changes in convective instability. However, the SCM increases oceanic rainfall too much, and fails to reproduce the land rainfall decrease, both of which are associated with uniform ocean warming. It is argued that remote atmospheric teleconnections play a crucial role in both weakening the atmospheric overturning circulation and constraining precipitation changes. Results suggest that the overturning circulation weakens, both as a direct local response to increased CO2 and in response to energy-imbalance driven exchanges between ascent and descent regions. © 2020 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Atmospheric humidity; Atmospheric temperature; Carbon dioxide; Oceanography; Rain; Surface properties; Surface waters; Tropics; Atmospheric teleconnections; Circulation patterns; Convective instabilities; General circulation model; Overturning circulation; Sea surface temperature (SST); Tropical precipitation; Weak temperature gradient approximations; Climate change; climate change; precipitation assessment; relative humidity; surface temperature; trend analysis; tropical environment
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/171308
作者单位	University of Exeter, Exeter, United Kingdom; Met Office Hadley Centre, Global Systems Institute, University of Exeter, Exeter, United Kingdom; Met Office, Exeter, United Kingdom; University of Reading, Reading, United Kingdom
推荐引用方式 GB/T 7714	Saint-Lu M.,Chadwick R.,Hugo Lambert F.,et al. Influences of local and remote conditions on tropical precipitation and its response to climate change[J],2020,33(10).
APA	Saint-Lu M..,Chadwick R..,Hugo Lambert F..,Collins M..,Boutle I..,...&Daleu C..(2020).Influences of local and remote conditions on tropical precipitation and its response to climate change.Journal of Climate,33(10).
MLA	Saint-Lu M.,et al."Influences of local and remote conditions on tropical precipitation and its response to climate change".Journal of Climate 33.10(2020).