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- Title
Heat sources within the Greenland Ice Sheet: dissipation, temperate paleo-firn and cryo-hydrologic warming.
- Authors
Lüthi, M. P.; Ryser, C.; Andrews, L. C.; Catania, G. A.; Funk, M.; Hawley, R. L.; Hoffman, M. J.; Neumann, T. A.
- Abstract
Ice temperature profiles from the Greenland Ice Sheet contain information on the deformation history, past climates and recent warming. We present full-depth temperature profiles from two drill sites on a flow line passing through Swiss Camp, West Greenland. Numerical modeling reveals that ice temperatures are considerably higher than would be expected from heat diffusion and dissipation alone. The possible causes for this extra heat are evaluated using a Lagrangian heat flow model. The model results reveal that the observations can be explained with a combination of different processes: enhanced dissipation (strain heating) in iceage ice, temperate paleo-firn, and cryo-hydrologic warming in deep crevasses.
- Subjects
GREENLAND Ice Sheet (Greenland); ICE sheets; TEMPERATURE measurements; ENERGY dissipation; HEAT flow (Oceanography); GREENLAND ice; MATHEMATICAL models
- Publication
Cryosphere, 2015, Vol 9, Issue 1, p245
- ISSN
1994-0416
- Publication type
Article
- DOI
10.5194/tc-9-245-2015