Antarctic ice sheet GLIMMER model test and its simplified model on 2-dimensional ice flow |
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| Authors: | Xueyuan Tang Zhanhai Zhang Bo Sun Yuansheng Li Na Li Wang Bangbing Xiangpei Zhang |
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| Institution: | a). Polar Research Institute of China, Shanghai 200136, China;
b). College of Geo-exploration Science and Technology, Jilin University, Changchun 130026, China |
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| Abstract: | The three-dimensional finite difference thermodynamic coupled model on Antarctic ice sheet, GLIMMER model, is described. An idealized ice sheet numerical test was conducted under the EISMINT-1 benchmark, and the characteristic curves of ice sheets under steady-state was obtained. Based on this, this model was simplified from a 3-dimensional one to 2-dimensional one. Improvement of the difference method and coordinate system was proposed. Evolution of the 2-dimensional ice flow was simulated under coupled temperature field conditions. The results showed that the characteristic curves deriving from the conservation of the mass, momentum and energy agree with the results of ice sheet profile simulated with GLIMMER model and with the theoretical results. The application prospect of the simplified 2-dimensional ice flow model to simulate the relation of age-depth-accumulation rate in Dome A region was discussed. |
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| Keywords: | Antarctic ice sheet GLIMMER model numerical simulation 2-dimensional ice flow |
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