DOI: 10.1029/2017JD028130
Scopus记录号: 2-s2.0-85050391466
论文题名: The Role of Atmospheric Rivers in Extratropical and Polar Hydroclimate
作者: Nash D. ; Waliser D. ; Guan B. ; Ye H. ; Ralph F.M.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 13 起始页码: 6804
结束页码: 6821
语种: 英语
英文关键词: Atmospheric Rivers
; Extratropical and Polar Hydroclimate
Scopus关键词: annual cycle
; extratropical environment
; ice sheet
; Northern Hemisphere
; polar region
; precipitation (climatology)
; sea ice
; Southern Hemisphere
; water budget
; water vapor
; Arctic
英文摘要: Atmospheric rivers (ARs) are narrow, long, transient, water vapor-rich corridors of the atmosphere that are responsible for over 90% of the poleward water vapor transport in and across midlatitudes. However, the role of ARs in modulating extratropical and polar hydroclimate features (e.g., water vapor content and precipitation) has not been fully studied, even though moistening of the polar atmosphere is both a key result and amplifier of Arctic warming and sea ice melt, and precipitation is key to the surface mass balance of polar sea ice and ice sheets. This study uses the Modern-Era Retrospective analysis for Research and Applications, Version 2 reanalysis to characterize the roles of AR water vapor transport on the column-integrated atmospheric water vapor budget in the extratropical and polar regions of both hemispheres. Meridional water vapor transport by ARs across a given latitude (examined for 40°, 50°, 60°, and 70°) is strongly related to variations in area-averaged (i.e., over the cap poleward of the given latitude) total water vapor storage and precipitation poleward of that latitude. For the climatological annual cycle, both AR transport (i.e., nonlocal sources) and total evaporation (i.e., local sources) are most correlated with total precipitation, although with slightly different phases. However, for monthly anomalies, the water budget at higher latitudes is largely dominated by the relationship between AR transport and precipitation. For pentad and daily anomalies, AR transport is related to both precipitation and water vapor storage variations. These results demonstrate the important role of episodic, extreme water vapor transports by ARs in modulating extratropical and polar hydroclimate. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113523
Appears in Collections: 气候减缓与适应
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作者单位: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Department of Geography, University of California, Santa Barbara, CA, United States; Joint Institute for Regional Earth System Science and Engineering, University of California, Los Angeles, CA, United States; Center for Western Weather and Water Extremes, Scripps Institution of Oceanography, La Jolla, CA, United States; Department of Geosciences and Environment, California State University, Los Angeles, CA, United States
Recommended Citation:
Nash D.,Waliser D.,Guan B.,et al. The Role of Atmospheric Rivers in Extratropical and Polar Hydroclimate[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(13)