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      Convection-Driven Melting near the Grounding Lines of Ice Shelves and Tidewater Glaciers

      Journal of Physical Oceanography
      American Meteorological Society

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          Ice sheet grounding line dynamics: Steady states, stability, and hysteresis

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            Acceleration of Jakobshavn Isbræ triggered by warm subsurface ocean waters

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              Surface melt-induced acceleration of Greenland ice-sheet flow.

              Ice flow at a location in the equilibrium zone of the west-central Greenland Ice Sheet accelerates above the midwinter average rate during periods of summer melting. The near coincidence of the ice acceleration with the duration of surface melting, followed by deceleration after the melting ceases, indicates that glacial sliding is enhanced by rapid migration of surface meltwater to the ice-bedrock interface. Interannual variations in the ice acceleration are correlated with variations in the intensity of the surface melting, with larger increases accompanying higher amounts of summer melting. The indicated coupling between surface melting and ice-sheet flow provides a mechanism for rapid, large-scale, dynamic responses of ice sheets to climate warming.
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                Author and article information

                Journal
                Journal of Physical Oceanography
                J. Phys. Oceanogr.
                American Meteorological Society
                0022-3670
                1520-0485
                December 2011
                December 2011
                : 41
                : 12
                : 2279-2294
                Article
                10.1175/JPO-D-11-03.1
                973a35d6-2d49-407e-8802-2c254b063c99
                © 2011
                History

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