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  Spatially variable drag in the shear-controlled melt parameterisation below ice shelves in NEMO

Vallot, D., Jourdain, N., Mathiot, P. (2023): Spatially variable drag in the shear-controlled melt parameterisation below ice shelves in NEMO, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-2515

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 Urheber:
Vallot, Dorothée1, Autor
Jourdain, Nicolas1, Autor
Mathiot, Pierre1, Autor
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Zusammenfassung: Currently, in NEMO and in most ocean models, melting parameterisation below ice shelves is controlled by shear stress, which depends on the mean flow in the boundary layer and the so-called coefficient of drag. This parameter, constant in space and time, is usually tuned to approach observed melt at a given ice shelf. This is equivalent to parameterise ice shelf bottoms as smooth surfaces, whereas, in reality, they can be very rough at different scales. As ice shelves are predicted to experience further damage in the future, applying a spatially varying drag might decrease uncertainties related to melt predictions below ice shelves.Here we present a study with a spatially variable coefficient of drag, which depends on the topography and on the first wet cell height. We use the ice shelf parameterisation of NEMO4.2 on a configuration of Amundsen Sea at 12th of a degree.

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Sprache(n): eng - Englisch
 Datum: 2023
 Publikationsstatus: Final veröffentlicht
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 Ort, Verlag, Ausgabe: -
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 Identifikatoren: DOI: 10.57757/IUGG23-2515
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Titel: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Veranstaltungsort: Berlin
Start-/Enddatum: 2023-07-11 - 2023-07-20

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Titel: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Genre der Quelle: Konferenzband
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Ort, Verlag, Ausgabe: Potsdam : GFZ German Research Centre for Geosciences
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