DOI: 10.1029/2018JD028714
Scopus记录号: 2-s2.0-85052389357
论文题名: Atmospheric River Impacts on Greenland Ice Sheet Surface Mass Balance
作者: Mattingly K.S. ; Mote T.L. ; Fettweis X.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 16 起始页码: 8538
结束页码: 8560
语种: 英语
英文关键词: atmospheric rivers
; Greenland Ice Sheet
; ice sheet mass balance
; poleward moisture transport
; self-organizing maps
英文摘要: Greenland Ice Sheet (GrIS) mass loss has accelerated since the turn of the twenty-first century. Several recent episodes of rapid GrIS ablation coincided with intense moisture transport over Greenland by atmospheric rivers (ARs), suggesting that these events influence the evolution of GrIS surface mass balance (SMB). ARs likely provide melt energy through several physical mechanisms, and conversely, may increase SMB through enhanced snow accumulation. In this study, we compile a long-term (1980–2016) record of moisture transport events using a conventional AR identification algorithm as well as a self-organizing map classification applied to MERRA-2 data. We then analyze AR effects on the GrIS using melt data from passive microwave satellite observations and regional climate model output. Results show that anomalously strong moisture transport by ARs clearly contributed to increased GrIS mass loss in recent years. AR activity over Greenland was above normal throughout the 2000s and early 2010s, and recent melting seasons with above-average GrIS melt feature positive moisture transport anomalies over Greenland. Analysis of individual AR impacts shows a pronounced increase in GrIS surface melt after strong AR events. AR effects on SMB are more complex, as strong summer ARs cause sharp SMB losses in the ablation zone that exceed moderate SMB gains induced by ARs in the accumulation zone during summer and in all areas during other seasons. Our results demonstrate the influence of the strongest ARs in controlling GrIS SMB, and we conclude that projections of future GrIS SMB should accurately capture these rare ephemeral events. ©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/113236
Appears in Collections: 气候减缓与适应
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作者单位: Climatology Research Laboratory, Department of Geography, University of Georgia, Athens, GA, United States; Laboratory of Climatology, Department of Geography, University of Liège, Liège, Belgium
Recommended Citation:
Mattingly K.S.,Mote T.L.,Fettweis X.. Atmospheric River Impacts on Greenland Ice Sheet Surface Mass Balance[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(16)