Other
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3824501l&link_type=abstract
Geophysical Research Letters, Volume 38, Issue 24, CiteID L24501
Other
Cryosphere: Ice Shelves, Cryosphere: Lakes (9345), Cryosphere: Ponds, Cryosphere: Glaciology (1621, 1827, 1863), Cryosphere: General Or Miscellaneous
Scientific paper
We describe a sequence of supraglacial lakes on the George VI Ice Shelf, Antarctica, that migrate along the boundary of the ice shelf with Alexander Island in the manner of a traveling wave, with a velocity that differs from the local ice-shelf flow in both magnitude and direction. These lakes are arranged en échelon along a grounding line of the ice shelf where the flow displays the atypical feature of being directed toward land. A simple model presented here suggests that the propagating lakes form in the depressions of a viscous-buckling wave associated with compressive ice-shelf stresses and ice-flow directed obliquely toward the coastline. The existence of these lakes and their propagation gives rise to the implication that other ice-shelf surface features (e.g., patterns of swells and depressions, surface lakes, and drainage) can be organized by large-scale viscous buckling behavior, when ice-shelf flow is strongly compressive.
LaBarbera C. H.
MacAyeal Douglas R.
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