气候变化领域集成服务门户(CCPortal): Tropical Rainfall Linked to Stronger Future ENSO-NAO Teleconnection in CMIP5 Models

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DOI	10.1029/2020GL088664
	Tropical Rainfall Linked to Stronger Future ENSO-NAO Teleconnection in CMIP5 Models
	Fereday D.R.; Chadwick R.; Knight J.R.; Scaife A.A.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:22
英文摘要	The El Niño–Southern Oscillation (ENSO) has previously been shown to influence the winter North Atlantic Oscillation (NAO). Here we investigate the ENSO-NAO teleconnection in historical and RCP8.5 scenario CMIP5 simulations and show a future strengthening of the teleconnection under RCP8.5. The teleconnection strength is associated with increased East Pacific tropical rainfall variability. Stratospheric and tropospheric teleconnection pathways are examined, with both pathways having stronger links in the future. The stratospheric pathway involves the Aleutian Low and the stratospheric polar vortex with a downward influence on the NAO. This pathway is clearest in the high-top models that better resolve the stratosphere. The tropospheric pathway is driven by the Pacific subtropical jet strengthening and extending further into the Atlantic in the future, generating increased baroclinicity in the Caribbean and influencing the Atlantic storm track. These results suggest increasing influence of tropical rainfall on extratropical circulation in the future. © 2020 Crown Copyright. Geophysical Research Letters. ©2020 American Geophysical Union. This article is published with the permission of the Controller of HMSO and the Queen's printer for Scotland.
英文关键词	Atmospheric pressure; Climate models; Rain; Tropics; Troposphere; Baroclinicity; Extratropical circulation; Southern oscillation; Stratospheric polar vortex; Subtropical jet; Teleconnections; Tropical rainfall; Winter North Atlantic Oscillation; Climatology; climate modeling; CMIP; El Nino-Southern Oscillation; future prospect; North Atlantic Oscillation; polar vortex; rainfall; simulation; storm track; stratosphere; teleconnection; tropical environment; troposphere; Pacific Ocean; Pacific Ocean (East)
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169402
作者单位	Met Office Hadley Centre, Exeter, United Kingdom; College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, United Kingdom
推荐引用方式 GB/T 7714	Fereday D.R.,Chadwick R.,Knight J.R.,et al. Tropical Rainfall Linked to Stronger Future ENSO-NAO Teleconnection in CMIP5 Models[J],2020,47(22).
APA	Fereday D.R.,Chadwick R.,Knight J.R.,&Scaife A.A..(2020).Tropical Rainfall Linked to Stronger Future ENSO-NAO Teleconnection in CMIP5 Models.Geophysical Research Letters,47(22).
MLA	Fereday D.R.,et al."Tropical Rainfall Linked to Stronger Future ENSO-NAO Teleconnection in CMIP5 Models".Geophysical Research Letters 47.22(2020).