Article (Scientific journals)
Basin-scale partitioning of Greenland ice sheet mass balance components (2007–2011)
Andersen, M.L.; Stenseng, L.; Skourup, H. et al.
2015In Earth and Planetary Science Letters, 409, p. 89–95
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Keywords :
Greenland ice sheet; surface mass balance; ice discharge
Abstract :
[en] The current deficit in Greenland ice sheet mass balance is due to both a decrease in surface mass balance (SMB ) input and an increase in ice discharge (D ) output. While SMB processes are beginning to be well captured by observationally-constrained climate modeling, insight into D is relatively limited. We use InSAR-derived velocities, in combination with ice thickness observations, to quantify the mass flux (F ) across a flux perimeter around the ice sheet at ∼1700 m elevation. To quantify D , we correct F for SMB , as well as changes in volume due to ice dynamics, in the area downstream of the gate. Using a 1961–1990 reference climatology SMB field from the MAR regional climate model, we quantify ice sheet mass balance within eighteen basins. We find a 2007–2011 mean D of View the MathML source. We find a 2007–2011 mean total mass balance of View the MathML source, which is equal to a 0.73 mm yr−1 global sea level rise contribution. This mass loss is dominated by SMB, which accounts for 61% of mass loss in the basins where partitioning is possible.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Andersen, M.L.
Stenseng, L.
Skourup, H.
Colgan, W.
Khan, S.A.
Kristensen, S.S.
Andersen, S.B.
Box, J.E.
Ahlstrøm, A.P.
Fettweis, Xavier  ;  Université de Liège - ULiège > Département de géographie > Climatologie et Topoclimatologie
Forsberg, R.
Language :
English
Title :
Basin-scale partitioning of Greenland ice sheet mass balance components (2007–2011)
Publication date :
01 January 2015
Journal title :
Earth and Planetary Science Letters
ISSN :
0012-821X
eISSN :
1385-013X
Publisher :
Elsevier Science, Amsterdam, Netherlands
Volume :
409
Pages :
89–95
Peer reviewed :
Peer Reviewed verified by ORBi
Tags :
CÉCI : Consortium des Équipements de Calcul Intensif
Funders :
CÉCI - Consortium des Équipements de Calcul Intensif [BE]
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