DOI: 10.1002/2013GL059185
论文题名: Greenland ice sheet melt from MODIS and associated atmospheric variability
作者: Häkkinen S. ; Hall D.K. ; Shuman C.A. ; Worthen D.L. ; Digirolamo N.E.
刊名: Geophysical Research Letters
ISSN: 0094-10277
EISSN: 1944-10008
出版年: 2014
卷: 41, 期: 5 起始页码: 1600
结束页码: 1607
语种: 英语
英文关键词: blocking
; Greenland ice sheet
; melt
Scopus关键词: Atmospheric temperature
; Glaciers
; Melting
; Meteorology
; Radiometers
; Atmospheric blocking
; Atmospheric variability
; blocking
; Greenland Ice Sheet
; Moderate resolution imaging spectroradiometer
; Standard deviation
; Surface temperatures
; Temperature anomaly
; Satellite imagery
; air mass
; melting
; MODIS
; seasonal variation
; subtropical region
; surface temperature
; temperature profile
; timescale
; Arctic
; Greenland
; Greenland Ice Sheet
英文摘要: Daily June-July melt fraction variations over the Greenland ice sheet (GIS) derived from the Moderate Resolution Imaging Spectroradiometer (MODIS) (2000-2013) are associated with atmospheric blocking forming an omega-shape ridge over the GIS at 500 hPa height. Blocking activity with a range of time scales, from synoptic waves breaking poleward (<5 days) to full-fledged blocks (≥5 days), brings warm subtropical air masses over the GIS controlling daily surface temperatures and melt. The temperature anomaly of these subtropical air mass intrusions is also important for melting. Based on the years with the greatest melt (2002 and 2012) during the MODIS era, the area-average temperature anomaly of 2 standard deviations above the 14 year June-July mean results in a melt fraction of 40% or more. Though the summer of 2007 had the most blocking days, atmospheric temperature anomalies were too small to instigate extreme melting. Key Points Short-term atmospheric blocking over Greenland contributes to melt episodes Associated temperature anomalies are equally important for the melt Duration and strength of blocking events contribute to surface melt intensity ©2014. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84895777964&doi=10.1002%2f2013GL059185&partnerID=40&md5=8b6b67be1d6beff33d5aa529fe7fe005
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7541
Appears in Collections: 气候减缓与适应
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作者单位: NASA Goddard Space Flight Center, Greenbelt MD, United States
Recommended Citation:
Häkkinen S.,Hall D.K.,Shuman C.A.,et al. Greenland ice sheet melt from MODIS and associated atmospheric variability[J]. Geophysical Research Letters,2014-01-01,41(5).