干旱区生态环境知识资源中心(Arid): Antarctic Atmospheric River Climatology and Precipitation Impacts

Arid

DOI	10.1029/2020JD033788
	Antarctic Atmospheric River Climatology and Precipitation Impacts
	Wille, Jonathan D.; Favier, Vincent; Gorodetskaya, Irina V.; Agosta, Cecile; Kittel, Christoph; Beeman, Jai Chowdhry; Jourdain, Nicolas C.; Lenaerts, Jan T. M.; Codron, Francis
通讯作者	Wille, JD (corresponding author), CNRS UGA IRD GINP, Inst Geosci Environm, St Martin Dheres, France.
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN	2169-897X
EISSN	2169-8996
出版年	2021
卷号	126 期号:8
英文摘要	The Antarctic ice sheet (AIS) is sensitive to short-term extreme meteorological events that can leave long-term impacts on the continent's surface mass balance (SMB). We investigate the impacts of atmospheric rivers (ARs) on the AIS precipitation budget using an AR detection algorithm and a regional climate model (Modele Atmospherique Regional) from 1980 to 2018. While ARs and their associated extreme vapor transport are relatively rare events over Antarctic coastal regions (similar to 3 days per year), they have a significant impact on the precipitation climatology. ARs are responsible for at least 10% of total accumulated snowfall across East Antarctica (localized areas reaching 20%) and a majority of extreme precipitation events. Trends in AR annual frequency since 1980 are observed across parts of AIS, most notably an increasing trend in Dronning Maud Land; however, interannual variability in AR frequency is much larger. This AR behavior appears to drive a significant portion of annual snowfall trends across East Antarctica, while controlling the interannual variability of precipitation across most of the AIS. AR landfalls are most likely when the circumpolar jet is highly amplified during blocking conditions in the Southern Ocean. There is a fingerprint of the Southern Annular Mode (SAM) on AR variability in West Antarctica with SAM+ (SAM-) favoring increased AR frequency in the Antarctic Peninsula (Amundsen-Ross Sea coastline). Given the relatively large influence ARs have on precipitation across the continent, it is advantageous for future studies of moisture transport to Antarctica to consider an AR framework especially when considering future SMB changes. Plain Language Summary The Antarctic continent, like many deserts in the world, receives a large percentage of its yearly precipitation from just a few intense precipitation events. Atmospheric rivers (ARs), narrow corridors of intense moisture transporting moisture from low to high latitudes, are commonly associated with heavy rain and snowfall in the midlatitudes like the west coasts of North/South America and Europe. In Antarctica, ARs are rarer with most near-coastal regions in Antarctica experiencing AR conditions a few days per year but still have a major influence on the surface mass balance of the ice sheet. ARs are responsible for 10%-20% of the total snowfall across East Antarctica. Although a modest percentage, this contribution to the snowfall budget is the component that has been driving parts of the positive annual snowfall trends in Dronning Maud and negative trends in Wilkes Land. Also, ARs control the year-to-year variability of precipitation across most of the ice sheet. Given the link between ARs and snowfall accumulation trends, increased future AR activity would result in higher snowfall accumulation on the Antarctic continent and possibly offset some sea-level rise from dynamic ice loss, but this must be considered in balance with increased melting frequency already documented with ARs. Key Points Atmospheric rivers in Antarctica are rare events but are a key contributor to the ice sheet's surface mass balance Their impact on precipitation is most pronounced in East Antarctica where they are responsible for a majority of extreme precipitation events Atmospheric rivers are contributing to modern snowfall trends and controlling overall precipitation variability across Antarctica
英文关键词	Antarctica atmospheric rivers climatology meteorology
类型	Article
语种	英语
开放获取类型	Green Published
收录类别	SCI-E
WOS记录号	WOS:000664863900019
WOS关键词	SURFACE MASS-BALANCE ; DRONNING MAUD LAND ; WIND-DRIVEN CIRCULATION ; ICE-SHEET ; WEST ANTARCTICA ; PART I ; SNOW ACCUMULATION ; EAST ANTARCTICA ; SYNOPTIC-SCALE ; ANNULAR MODES
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350835
作者单位	[Wille, Jonathan D.; Favier, Vincent; Beeman, Jai Chowdhry; Jourdain, Nicolas C.] CNRS UGA IRD GINP, Inst Geosci Environm, St Martin Dheres, France; [Gorodetskaya, Irina V.] Univ Aveiro, CESAM Ctr Environm & Marine Studies, Dept Phys, Aveiro, Portugal; [Agosta, Cecile] LSCE Lab Sci Climat & Environm, Gif Sur Yvette, France; [Kittel, Christoph] Univ Liege, Dept Geog, Lab Climatol, Liege, Belgium; [Lenaerts, Jan T. M.] Univ Colorado, Dept Atmospher & Ocean Sci, Boulder, CO USA; [Codron, Francis] Univ Paris 06, LOCEAN, Paris, France
推荐引用方式 GB/T 7714	Wille, Jonathan D.,Favier, Vincent,Gorodetskaya, Irina V.,et al. Antarctic Atmospheric River Climatology and Precipitation Impacts[J],2021,126(8).
APA	Wille, Jonathan D..,Favier, Vincent.,Gorodetskaya, Irina V..,Agosta, Cecile.,Kittel, Christoph.,...&Codron, Francis.(2021).Antarctic Atmospheric River Climatology and Precipitation Impacts.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,126(8).
MLA	Wille, Jonathan D.,et al."Antarctic Atmospheric River Climatology and Precipitation Impacts".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 126.8(2021).