期刊
GEOPHYSICAL RESEARCH LETTERS
卷 38, 期 -, 页码 -出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2011GL049970
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资金
- U.S. National Science Foundation [ANT0944248]
- Directorate For Geosciences
- Office of Polar Programs (OPP) [0944248] Funding Source: National Science Foundation
- Directorate For Geosciences
- Office of Polar Programs (OPP) [0907834] Funding Source: National Science Foundation
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 echelon 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. Citation: LaBarbera, C. H., and D. R. MacAyeal (2011), Traveling supraglacial lakes on George VI Ice Shelf, Antarctica, Geophys. Res. Lett., 38, L24501, doi:10.1029/2011GL049970.
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