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| Titel |
A full-Stokes anisotropic ice flow model for Dome A, Antarctica |
| VerfasserIn |
Thomas Zwinger, Liyun Zhao, John C. Moore, Dong Zhang, Xueyuan Tang, Bo Sun, Carlos Martin |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250075983
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| Zusammenfassung |
| Chinese scientists will start to drill a deep ice core at Kunlun station near Dome A in the near
future. It is important to know the basal temperature of ice and estimate the age of the ice
core. We apply a three-dimensional, thermo-mechanically coupled full-Stokes model to a
70Ã70Â km2 domain around the Kunlun station, using the package Elmer/Ice. We
conduct simulations using non-linear flow laws with isotropic and different prescribed
anisotropic fabrics which affect the vertical advection and in consequence control both,
the basal temperature and age profile. We also assess basal age and thermal state
sensitivities to geothermal heat flux and surface conditions. For those parts of the
bed in the domain that reach pressure melting point, which partially coincide with
radar observations, we determine basal melt rates that in turn influence the age. |
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