Reference : Basin-scale partitioning of Greenland ice sheet mass balance components (2007–2011)
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
Basin-scale partitioning of Greenland ice sheet mass balance components (2007–2011)
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 mailto [Université de Liège - ULiège > Département de géographie > Climatologie et Topoclimatologie >]
Forsberg, R. []
Earth and Planetary Science Letters
Elsevier Science
Yes (verified by ORBi)
The Netherlands
[en] Greenland ice sheet ; surface mass balance ; ice discharge
[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.

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