| Title |
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Relation of measured basal temperatures and the spatial distribution of the geothermal heat flux for the Greenland ice sheet
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| Creator |
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| Accessrights |
open access |
| Rights |
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en
© 2005 International Glaciological Society
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| Subject |
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Other
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Greenland
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Other
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Ice sheet
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Other
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Modelling
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Other
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Basal temperature
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Other
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Geothermal heat flux
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NDC
452
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| Description |
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Abstract
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The thermomechanical, three-dimensional ice-sheet model SICOPOLIS is applied to the Greenland ice sheet. Simulations over two glacial–interglacial cycles are carried out, driven by a climatic forcing interpolated between present conditions and Last Glacial Maximum anomalies. Based on the global heat-flow representation by Pollack and others (1993), we attempt to constrain the spatial pattern of the geothermal heat flux by comparing simulation results to direct measurements of basal temperatures at the GRIP, NorthGRIP, Camp Century and Dye 3 ice-core locations. The obtained heatflux map shows an increasing trend from west to east, a high-heat-flux anomaly around NorthGRIP with values up to 135mWm–2 and a low-heat-flux anomaly around Dye 3 with values down to 20mWm–2. Validation is provided by the generally good fit between observed and measured ice thicknesses. Residual discrepancies are most likely due to deficiencies of the input precipitation rate and further variability of the geothermal heat flux not captured here.
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| Publisher |
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International Glaciological Society
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| Date |
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| Language |
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| Resource Type |
journal article |
| Version Type |
VoR |
| Identifier |
HDL
http://hdl.handle.net/2115/34545
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| Relation |
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URI
http://www.igsoc.org/
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isIdenticalTo
DOI
https://doi.org/10.3189/172756405781812510
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| Journal |
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PISSN
0260-3055
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EISSN
1727-5644
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en
Annals of Glaciology
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Volume Number42
Page Start424
Page End432
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| File |
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| Oaidate |
2023-07-26 |
