气候变化领域集成服务门户(CCPortal): The Atlantic Jet Response to Stratospheric Events: A Regime Perspective

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DOI	10.1029/2020JD033358
	The Atlantic Jet Response to Stratospheric Events: A Regime Perspective
	Goss M.; Lindgren E.A.; Sheshadri A.; Diffenbaugh N.S.
发表日期	2021
ISSN	2169897X
卷号	126 期号:7
英文摘要	The tropospheric response to Sudden Stratospheric Warmings (SSWs) is associated with an equatorward shift in the midlatitude jet and associated storm tracks, while Strong Polar Vortex (SPV) events elicit a contrasting response. Recent analyses of the North Atlantic jet using probability density functions of a jet latitude index have identified three preferred jet latitudes, raising the question of whether the tropospheric response to SSWs and SPVs results from a change in relative frequencies of these preferred jet regimes rather than a systematic jet shift. We explore this question using atmospheric reanalysis data from 1979 to 2018 (26 SSWs and 33 SPVs), and a 202-years integration of the Whole Atmosphere Community Climate Model (92 SSWs and 68 SPVs). Following SSWs, the northern jet regime becomes less common and the central and southern regimes become more common. These changes occur almost immediately following “split” vortex events, but are more delayed following “displacement” events. In contrast, the northern regime becomes more frequent and the southern regime less frequent following SPV events. Following SSWs, composites of 500-hPa geopotential heights, surface air temperatures, and precipitation most closely resemble composites of the southern jet regime, and are generally opposite in sign to the composites of the northern jet regime. These comparisons are reversed following SPVs. Thus, one possible interpretation is that the two southernmost regimes appear to be favored following SSWs, while the southernmost regime becomes less common following SPVs. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Atlantic jet; jet regimes; north Atlantic; polar vortex; stratosphere-troposphere interactions; sudden stratospheric warming
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185345
作者单位	Department of Earth System Science, Stanford University, Stanford, CA, United States; Swiss Re, Armonk, NY, United States; Woods Institute for the Environment, Stanford University, Stanford, CA, United States
推荐引用方式 GB/T 7714	Goss M.,Lindgren E.A.,Sheshadri A.,et al. The Atlantic Jet Response to Stratospheric Events: A Regime Perspective[J],2021,126(7).
APA	Goss M.,Lindgren E.A.,Sheshadri A.,&Diffenbaugh N.S..(2021).The Atlantic Jet Response to Stratospheric Events: A Regime Perspective.Journal of Geophysical Research: Atmospheres,126(7).
MLA	Goss M.,et al."The Atlantic Jet Response to Stratospheric Events: A Regime Perspective".Journal of Geophysical Research: Atmospheres 126.7(2021).