self-regulation of ice flow varies across the ablation area in south-west greenland

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ID: 259584
2015
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Abstract
The concept of a positive feedback between ice flow and enhanced melt rates in a warmer climate fuelled the debate regarding the temporal and spatial controls on seasonal ice acceleration. Here we combine melt, basal water pressure and ice velocity data. Using 20 years of data covering the whole ablation area, we show that there is not a strong positive correlation between annual ice velocities and melt rates. Annual velocities even slightly decreased with increasing melt. Results also indicate that melt variations are most important for velocity variations in the upper ablation zone up to the equilibrium line altitude. During the extreme melt in 2012, a large velocity response near the equilibrium line was observed, highlighting the possibility of meltwater to have an impact even high on the ice sheet. This may lead to an increase of the annual ice velocity in the region above S9 and requires further monitoring.
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wal2015theself-regulation Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;R. S. W. van de Wal;C. J. P. P. Smeets;W. Boot;M. Stoffelen;R. van Kampen;S. H. Doyle;F. Wilhelms;M. R. van den Broeke;C. H. Reijmer;J. Oerlemans;A. Hubbard
Journal journal of applied polymer science
Year 2015
DOI
10.5194/tc-9-603-2015
URL
http://www.the-cryosphere.net/9/603/2015/tc-9-603-2015.pdf
Keywords
environmental sciencesgeology

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