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Arctic Cut-Off High Drives the Poleward Shift of a New Greenland Melting RecordLarge-scale atmospheric circulation controls the mass and energy balance of the Greenland ice sheet through its impact on radiative budget, runoff and accumulation. Here, using reanalysis data and the outputs of a regional climate model, we show that the persistence of an exceptional atmospheric ridge, centered over the Arctic Ocean, was responsible for a poleward shift of runoff, albedo and surface temperature records over the Greenland during the summer of 2015. New records of monthly mean zonal winds at 500 hPa and of the maximum latitude of ridge peaks of the 5,700+/-50 m isohypse over the Arctic were associated with the formation and persistency of a cutoff high. The unprecedented (1948-2015) and sustained atmospheric conditions promoted enhanced runoff, increased the surface temperatures and decreased the albedo in northern Greenland, while inhibiting melting in the south, where new melting records were set over the past decade. Subject terms: Earth sciences Atmospheric science Climate science
Document ID
20160007921
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Tedesco, M.
(Columbia Univ. New York, NY, United States)
Mote, T.
(Georgia Univ. Athens, GA, United States)
Fettweis, X.
(Liege Univ. Belgium)
Hanna, E.
(Sheffield Univ. United Kingdom)
Jeyaratnam, J.
(City Coll. of the City Univ. of New York NY, United States)
Booth, J. F.
(City Coll. of the City Univ. of New York NY, United States)
Datta, R.
(City Univ. of New York New York, NY, United States)
Briggs, K.
(Leeds Univ. United Kingdom)
Date Acquired
June 27, 2016
Publication Date
June 9, 2016
Publication Information
Publication: Nature: Communications
Publisher: Nature Publishing Group
Volume: 7
Subject Category
Meteorology And Climatology
Report/Patent Number
GSFC-E-DAA-TN33133
Distribution Limits
Public
Copyright
Other
Keywords
drainage
Greenland
albedo
surface temperature
balance

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