气候变化领域集成服务门户(CCPortal): Dynamic and thermodynamic modulators of European atmospheric rivers

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DOI	10.1175/JCLI-D-19-0601.1
	Dynamic and thermodynamic modulators of European atmospheric rivers
	Zavadoff B.L.; Kirtman B.P.
发表日期	2020
ISSN	0894-8755
起始页码	4167
结束页码	4185
卷号	33 期号:10
英文摘要	Large-scale analysis of the dynamic and thermodynamic properties of landfalling atmospheric rivers (ARs) over western Europe is performed utilizing 38 years of the Modern-Era Retrospective Analysis for Research and Applications, version 2 (MERRA-2), reanalysis dataset. A climatology of landfalling ARs from 1980 to 2017 is developed using a combination of integrated water vapor transport (IVT) calculations and a detection algorithm, which identified 578 ARs over the study period. Examination of the upper-level potential vorticity (PV) fields shows that 73% of these AR events are related to anticyclonic Rossby wave breaking (RWB), a dynamic feature which has been shown to play a role in AR strength and structure. Atmospheric river variability is also found to be closely tied to jet-stream latitude modulation by the North Atlantic Oscillation (NAO), such that during a positive NAO the North Atlantic jet is shifted north, creating an environment that is more favorable for anticyclonic RWB and AR landfalls over northern Europe, and during a negative NAO it is shifted south, creating such an environment over southern Europe.Through the use of linear regression analysis, AR strength is shown to be dependent on atmospheric moisture availability, which is found to increase as sea surface temperatures (SSTs) increase. Therefore, in a warming climate warmer SSTs leading to higher atmospheric moisture availability will result in an increase in the average strength and intensity of ARs over western Europe-a trend that has already been observed. © 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 pressure; Large dataset; Mechanical waves; Moisture; Regression analysis; Rivers; Thermodynamic properties; Atmospheric moisture; Detection algorithm; Integrated water vapors; Large-scale analysis; North Atlantic oscillations; Research and application; Retrospective analysis; Sea surface temperatures; Oceanography; algorithm; anticyclone; atmospheric dynamics; data set; detection method; jet; Rossby wave; thermodynamic property; water vapor; Europe
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/171314
作者单位	Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, United States
推荐引用方式 GB/T 7714	Zavadoff B.L.,Kirtman B.P.. Dynamic and thermodynamic modulators of European atmospheric rivers[J],2020,33(10).
APA	Zavadoff B.L.,&Kirtman B.P..(2020).Dynamic and thermodynamic modulators of European atmospheric rivers.Journal of Climate,33(10).
MLA	Zavadoff B.L.,et al."Dynamic and thermodynamic modulators of European atmospheric rivers".Journal of Climate 33.10(2020).