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- W3035019512 abstract "The velocity field and the height at the surface of a dynamic ice sheet are observed. The ice sheets are modeled by the full Stokes equations and shallow shelf/shelfy stream approximations. Time dependence is introduced by a kinematic free surface equation which updates the surface elevation using the velocity solution. The sensitivity of the observed quantities at the ice surface to parameters in the models, for example the basal topography and friction coefficients, is analyzed by first deriving the time dependent adjoint equations. Using the adjoint solutions, the effect of a perturbation in a parameter is obtained showing the importance of including the time dependence, in particular when the height is observed. The adjoint equations are solved analytically and numerically and the sensitivity of the desired parameters is determined in several examples in two dimensions. A closed form of the analytical solutions to the adjoint equations is given for a two dimensional grounding line migration problem in steady state under the shallow shelf approximation." @default.
- W3035019512 created "2020-06-19" @default.
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- W3035019512 date "2019-01-01" @default.
- W3035019512 modified "2023-09-27" @default.
- W3035019512 title "Parameter sensitivity analysis of dynamic ice sheet models" @default.
- W3035019512 hasPublicationYear "2019" @default.
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