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; Forsberg, R.

doi:10.1016/j.epsl.2014.10.015

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Article (Scientific journals)

Basin-scale partitioning of Greenland ice sheet mass balance components (2007–2011)

Andersen, M.L.; Stenseng, L.; Skourup, H. et al.

2015 • In Earth and Planetary Science Letters, 409, p. 89–95

Peer Reviewed verified by ORBi

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https://hdl.handle.net/2268/173996

DOI
10.1016/j.epsl.2014.10.015

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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

Additional URL :

http://www.sciencedirect.com/science/article/pii/S0012821X14006360

Available on ORBi :

since 18 November 2014

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