一种模拟冰盖中地线迁移的全Stokes亚网格模型
A full Stokes subgrid model for simulation of grounding line migration in ice sheets
摘要：
全斯托克斯方程求解的有限元方法模拟大冰盖和冰川。该模拟对接地线的离散化特别敏感，接地线将基岩上的冰和水上漂浮的冰分开，并及时移动。冰底的边界条件采用Nitsche方法和接地线附近离散单元的亚网格处理。仿真结果表明了该方法的有效性。它是在开源代码Elmer/ICE的二维版本中实现的。
英文摘要：
The full Stokes equations are solved by a finite element method for simulation of large ice sheets and glaciers. The simulation is particularly sensitive to the discretization of the grounding line which separates the ice resting on the bedrock and the ice floating on water and is moving in time. The boundary conditions at the ice base are enforced by Nitsche's method and a subgrid treatment of the elements in the discretization close to the grounding line. Simulations with the method in two dimensions for an advancing and a retreating grounding line illustrate the performance of the method. It is implemented in the two dimensional version of the open source code Elmer/ICE.
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