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Issue EPJ Web of Conferences
Volume 1, 2009
ERCA 2008 - From the Human Dimensions of Global Environmental Change to the Observation of the Earth from Space
Page(s) 171 - 176
DOI 10.1140/epjconf/e2009-00918-7
Published online 25 February 2009

Eur. Phys. J. Conferences 1, 171-176 (2009)
DOI: 10.1140/epjconf/e2009-00918-7

Towards a re-assessment of the surface mass balance of the Greenland ice sheet

M. van den Broeke1, J. Ettema1, W.J. van de Berg1 and E. van Meijgaard2

1  Institute for Marine and Atmospheric research, Utrecht University, PO Box 8005, 3508 TA Utrecht, The Netherlands
2  Royal Netherlands Meteorological Institute, PO Box 201, 3730 AE De Bilt, The Netherlands


Published online: 25 February 2009

Abstract
At present, the mass balance and especially the surface mass balance of the Greenland Ice Sheet (GrIS) are poorly known. Current methods to determine GrIS surface mass balance as well as the inherent uncertainties are discussed. Special emphasis is placed on the increasingly important role of regional atmospheric climate models, which explicitly calculate the individual components of the surface mass balance: (solid) precipitation, melt and subsequent runoff, sublimation/deposition and refreezing in the snow. Especially the latter term is very uncertain, and poses a great challenge to modellers. Some recent advances in these fields of research are presented.



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