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Abstract
Synchronous coupling is developed between an ice sheet model and a $z$-coordinate ocean model (the MITgcm). A previously-developed scheme to allow continuous vertical movement of the ice-ocean interface of a floating ice shelf (``vertical coupling'') is built upon to allow continuous movement of the grounding line, or point of floatation of the ice sheet (``horizontal coupling''). Horizontal coupling is implemented through the maintenance of a thin layer of ocean ($\sim$1 m) under grounded ice, which is inflated into the real ocean as the ice ungrounds. This is accomplished through a modification of the ocean model's nonlinear free surface evolution in a manner akin to a hydrological model in the presence of steep bathymetry. The coupled model is applied to a number of idealized geometries and shown to successfully represent ocean-forced marine ice sheet retreat while maintaining a continuous ocean circulation.
Original language | English |
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Pages (from-to) | 45-60 |
Journal | Ocean modelling |
Volume | 125 |
Early online date | 29 Mar 2018 |
DOIs | |
Publication status | Published - May 2018 |
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Dive into the research topics of 'Representing grounding line migration in synchronous coupling between a marine ice sheet model and a z-coordinate ocean model'. Together they form a unique fingerprint.Projects
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Is ice loss from West Antarctica driven by ocean forcing or ice and ocean feedbacks?
31/12/14 → 31/10/20
Project: Research