Ice Shelf Water Structure Beneath the Larsen C Ice Shelf in Antarctica

Sung Na, Ji; Davis, Peter ORCID: https://orcid.org/0000-0002-6471-6310; Kim, Byeong-Hoon; Kyung Jin, Emilia; Sang Lee, Won. 2023 Ice Shelf Water Structure Beneath the Larsen C Ice Shelf in Antarctica. Geophysical Research Letters, 50 (19), e2023GL104088. 10, pp. https://doi.org/10.1029/2023GL104088

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Official URL: https://agupubs.onlinelibrary.wiley.com/doi/10.102...

Abstract/Summary

Understanding ice shelf water (ISW) structure is crucial for studying the basal melting of ice shelves. In this study, we performed large-eddy simulation experiments to assess ISW structure and basal melt patterns under different current velocity scenarios observed in the Larsen C ice shelf, Antarctica. The LES results revealed that the thickness of ISW is primarily determined by the meridional velocity (perpendicular to the grounding line), while the zonal velocity influences the potential temperature and salinity of ISW. We found that a key parameter determining the basal melt rate was northward meltwater advection which originates from variances in meltwater generation. This advection, in turn, leads to the tilted isopycnals and the potential for thermohaline interleaving in a diffusive convection regime. The different slopes of isopycnals induce distinct heat fluxes, resulting in different basal melt rates far from and near the grounding line (∼0.44 and 1.59 m yr−1, respectively).

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1029/2023GL104088
ISSN:	0094-8276
Additional Keywords:	ice shelf water, meltwater, melt rate, interleaving layer, large eddy simulation, turbulence
Date made live:	09 Oct 2023 09:04 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/536045

Item Type:

Publication - Article

Digital Object Identifier (DOI):

https://doi.org/10.1029/2023GL104088

ISSN:

0094-8276

Additional Keywords:

ice shelf water, meltwater, melt rate, interleaving layer, large eddy simulation, turbulence

Date made live:

09 Oct 2023 09:04 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/536045