Coupled models of glacial isostasy and ice sheet dynamics ...
This thesis deals with the incorporation of isostatic processes into realistic models of ice sheet dynamics. A viscoelastic half-space model of isostatic adjustment is developed, and as an initial exercise is coupled to a model of the Antarctic ice sheet simulating the last glacial cycle. The ice sh...
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| Format: | Thesis |
| Language: | unknown |
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University Of Tasmania
2023
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| Online Access: | https://dx.doi.org/10.25959/23241827 https://figshare.utas.edu.au/articles/thesis/Coupled_models_of_glacial_isostasy_and_ice_sheet_dynamics/23241827 |
| Summary: | This thesis deals with the incorporation of isostatic processes into realistic models of ice sheet dynamics. A viscoelastic half-space model of isostatic adjustment is developed, and as an initial exercise is coupled to a model of the Antarctic ice sheet simulating the last glacial cycle. The ice sheet model is a three dimensional, time-dependent model originally formulated by Jenssen (1977) where the driving input data are net accumulation of snow and eustatic sea level change. This allows examination of the sensitivity of the ice sheet simulation to changes in the parameters of the isostatic model. In general, the maximum ice volume generated over a glacial cycle decreases with increasing mantle viscosity and increasing lithospheric rigidity. To obtain realistic values for the isostatic parameters of mantle viscosity and lithospheric rigidity the retreat of the Northern Hemisphere ice sheets and the subsequent isostatic adjustment since the last ice age is simulated. The isostatic parameters are adjusted ... |
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