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- W4316362362 abstract "<strong class=journal-contentHeaderColor>Abstract.</strong> The oceanic forcing of basal melt under floating ice shelves in Greenland and Antarctica is one of the major sources of uncertainty in climate ice sheet modelling. We use a high resolution, non-hydrostatic configuration of the Massachusetts Institute of Technology general circulation model (MITgcm) to investigate basal melt rates and melt driven circulation in the Sherard Osborn Fjord under the floating tongue of Ryder Glacier, northwestern Greenland. The control model configuration, based on the first ever observational survey by <em>Ryder 2019 Expedition</em>, yielded melt rates consistent with independent satellite estimates. A protocol of model sensitivity experiments quantified the response to oceanic thermal forcing due to a warming Atlantic Water, and to the buoyancy input from the subglacial discharge of surface fresh water. We found that the average basal melt rates show a nonlinear response to oceanic forcing in the lower range of ocean temperatures, while the response becomes indistinguishable from linear for higher ocean temperatures, which unifies the results from previous modelling studies of other marine terminating glaciers. The melt rate response to subglacial discharge is sublinear, consistent with other studies. The melt rates and circulation below the ice tongue exhibit a spatial pattern that is determined by the ambient density stratification." @default.
- W4316362362 created "2023-01-16" @default.
- W4316362362 creator A5001064251 @default.
- W4316362362 date "2023-01-15" @default.
- W4316362362 modified "2023-10-01" @default.
- W4316362362 title "Comment on egusphere-2022-1296" @default.
- W4316362362 doi "https://doi.org/10.5194/egusphere-2022-1296-rc1" @default.
- W4316362362 hasPublicationYear "2023" @default.
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