NDLI: Greenland ice sheet melt from modis and associated atmospheric variability

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Greenland ice sheet melt from modis and associated atmospheric variability

Content Provider	NASA Technical Reports Server (NTRS)
Author	DiGirolamo, Nicolo E. Hakkinen, Sirpa Worthen, Denise L. Hall, Dorothy K. Shuman, Christopher A.
Copyright Year	2014
Description	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 500hPa height (from NCEPNCAR). 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 largest MODIS melt years (2002 and 2012), 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. Summer 2007 had the most blocking days, however atmospheric temperature anomalies were too small to instigate extreme melting.
File Size	1029103
Page Count	5
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20140012683
Archival Resource Key	ark:/13960/t39074b06
Language	English
Publisher Date	2014-03-16
Access Restriction	Open
Subject Keyword	Ice Sheet Melt Modis Greenland Imaging Spectrometers Intrusion Melting Atmospheric Temperature Surface Temperature Air Masses Modis Radiometry Ice Standard Deviation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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