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Volume 11, issue 3
The Cryosphere, 11, 1371–1386, 2017
https://doi.org/10.5194/tc-11-1371-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: Mass balance of the Greenland Ice Sheet

The Cryosphere, 11, 1371–1386, 2017
https://doi.org/10.5194/tc-11-1371-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 09 Jun 2017

Research article | 09 Jun 2017

Hypsometric amplification and routing moderation of Greenland ice sheet meltwater release

Dirk van As et al.
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Bamber, J. L., Griggs, J. A., Hurkmans, R. T. W. L., Dowdeswell, J. A., Gogineni, S. P., Howat, I., Mouginot, J., Paden, J., Palmer, S., Rignot, E., and Steinhage, D.: A new bed elevation dataset for Greenland, The Cryosphere, 7, 499–510, https://doi.org/10.5194/tc-7-499-2013, 2013.
Banwell, A. F., Willis, I. C., and Arnold, N. S.: Modeling subglacial water routing at Paakitsoq, W Greenland, J. Geophys. Res.-Earth Surf., 118, 1282–1295, https://doi.org/10.1002/jgrf.20093, 2013.
Bartholomew, I., Nienow, P., Sole, A., Mair, D., Cowton, T., Palmer, S., and Wadham, J.: Supraglacial forcing of subglacial drainage in the ablation zone of the Greenland ice sheet, Geophys. Res. Lett., 38, L08502, https://doi.org/10.1029/2011GL047063, 2011.
Bøggild, C. E., Forsberg, R., and Reeh, N.: Meltwater retention in a transect across the Greenland ice sheet, Ann. Glaciol., 40, 169–173, 2005.
Cappelen, J. (Ed.): Weather observations in Greenland 1958–2015, DMI Report 16–08, 31 pp., ISSN: 2445-9127, 2016.
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The Greenland ice sheet melts faster in a warmer climate. The ice sheet is flatter at high elevation, therefore atmospheric warming increases the melt area exponentially. For current climate conditions, we find that the ice sheet shape amplifies the total meltwater generation by roughly 60 %. Meltwater is not stored underneath the ice sheet, as previously found, but it does take multiple days for it to pass through the seasonally developing subglacial drainage channels, moderating discharge.
The Greenland ice sheet melts faster in a warmer climate. The ice sheet is flatter at high...
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