Heat sources within the Greenland Ice Sheet: dissipation, temperate paleo-firn and cryo-hydrologic warming
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 tempe...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2015-02-01
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| Series: | The Cryosphere |
| Online Access: | http://www.the-cryosphere.net/9/245/2015/tc-9-245-2015.pdf |
| Summary: | 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 ice-age ice, temperate paleo-firn,
and cryo-hydrologic warming in deep crevasses. |
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| ISSN: | 1994-0416 1994-0424 |