Seismic evidence for complex sedimentary control of Greenland Ice Sheet flow

B Kulessa, AL Hubbard, AD Booth, Marion Bougamont, C Dow, SH Doyle, Poul Christoffersen, K Lindback, R Pettersson, AW Fitzpatrick & GA Jones
The land-terminating margin of the Greenland Ice Sheet has slowed down in recent decades, although the causes and implications for future ice flow are unclear. Explained originally by a self-regulating mechanism where basal slip reduces as drainage evolves from low to high efficiency, recent numerical modeling invokes a sedimentary control of ice sheet flow as an alternative hypothesis. Although both hypotheses can explain the recent slowdown, their respective forecasts of a long-term deceleration versus an...
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