DOI: 10.1029/2017JD027626
Scopus记录号: 2-s2.0-85048959904
论文题名: Atmospheric Rivers Carry Nonmonsoon Extreme Precipitation Into Nepal
作者: Thapa K. ; Endreny T.A. ; Ferguson C.R.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 11 起始页码: 5901
结束页码: 5912
语种: 英语
英文关键词: atmospheric rivers
; extreme precipitation
; flooding
; Himalayas
; integrated vapor transport
Scopus关键词: atmospheric moisture
; atmospheric transport
; climatology
; extreme event
; flooding
; monsoon
; precipitation (climatology)
; water vapor
; Himalayas
; Nepal
英文摘要: Atmospheric rivers (ARs) are concentrated bands of water vapor that can cause extreme precipitation and severe flooding. Fortunately, due to their 1,500+ km spatial extent, they may also be forecasted days in advance. The goals of this study were to investigate the seasonal climatology of ARs in the Himalayan region of Nepal and to determine the role of ARs in extreme precipitation events. Using the ERA-Interim atmospheric reanalysis, we applied a standard integrated vapor transport AR detection approach for the 35-year period from 1979 to 2013. We detected 433 ARs, or approximately 12 ARs yearly. Along our six (0.75°) grid detection transect, ARs explain 35% of grid annual maximum daily precipitation events and 70% of grid nonmonsoon (October–May) maximum daily precipitation events. In 89% and 71% of years, at least one of the six detection grids experienced an AR-related nonmonsoon maximum or annual maximum event, respectively. Overall, ARs explain 78% of daily precipitation totals exceeding 33 mm in the nonmonsoon season in comparison to 18% if the entire year is considered. As we show, ARs constitute a valuable new lens through which extreme precipitation in the region may be understood and forecasted. However, follow-on integrated vapor transport analyses that more closely investigate the interaction between ARs and their synoptic-scale environment are needed to better differentiate January and February ARs from Western Disturbances and June–September ARs from the Indian monsoon. ©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/113694
Appears in Collections: 气候减缓与适应
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作者单位: Department of Environmental Resources Engineering, State University of New York College of Environmental Science and Forestry, Syracuse, NY, United States; Atmospheric Sciences Research Center, University at Albany, State University of New York, Albany, NY, United States; Department of Atmospheric and Environmental Sciences, University at Albany, State University of New York, Albany, NY, United States
Recommended Citation:
Thapa K.,Endreny T.A.,Ferguson C.R.. Atmospheric Rivers Carry Nonmonsoon Extreme Precipitation Into Nepal[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(11)