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- W3023274594 abstract "Abstract Ocean bathymetry exerts a strong control on ice sheet‐ocean interactions within Antarctic ice‐shelf cavities, where it can limit the access of warm, dense water at depth to the underside of floating ice shelves. However, ocean bathymetry is challenging to measure within or close to ice‐shelf cavities. It remains unclear how uncertainty in existing bathymetry datasets affect simulated sub‐ice‐shelf melt rates. Here we infer linear sensitivities of ice‐shelf melt rates to bathymetric shape with grid‐scale detail by means of the adjoint of an ocean general circulation model. Both idealized and realistic‐geometry experiments of sub‐ice‐shelf cavities in West Antarctica reveal that bathymetry has a strong impact on melt in localized regions such as topographic obstacles to flow. Moreover, response of melt to bathymetric perturbation is found to be non‐monotonic, with deepening leading to either increased or decreased melt depending on location. Our computational approach provides a comprehensive way of identifying regions, where refined knowledge of bathymetry is most impactful, and also where bathymetric errors have relatively little effect on modeled ice sheet‐ocean interactions." @default.
- W3023274594 created "2020-05-13" @default.
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- W3023274594 date "2020-11-01" @default.
- W3023274594 modified "2023-09-27" @default.
- W3023274594 title "Bathymetric Influences on Antarctic Ice‐Shelf Melt Rates" @default.
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- W3023274594 doi "https://doi.org/10.1029/2020jc016370" @default.
- W3023274594 hasPublicationYear "2020" @default.
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