Observational evidence for on-shelf heat transport driven by dense water export in the Weddell Sea

The transport of oceanic heat towards the Antarctic continental margin is central to the mass balance of the Antarctic Ice Sheet. Recent modeling efforts challenge our view on where and how the on-shelf heat flux occurs, suggesting that it is largest where dense shelf waters cascade down the contine...

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Bibliographic Details
Published in:Nature communications 2023-03, Vol.14 (1), p.1022-1022, Article 1022
Main Authors: Darelius, Elin, Daae, Kjersti, Dundas, Vår, Fer, Ilker, Hellmer, Hartmut H., Janout, Markus, Nicholls, Keith W., Sallée, Jean-Baptiste, Østerhus, Svein
Format: Article
Language:English
Subjects:
704/106/829/2737
704/829/2737
Cold
Continental margins
Continental slope
Deep sea moorings
Heat
Heat flux
Heat transfer
Heat transport
Humanities and Social Sciences
Ice sheets
Ice shelves
Mass balance
Modelling
multidisciplinary
Observational studies
Overflow
Science
Science (multidisciplinary)
Sciences of the Universe
Shelving
Simulation
Warm water
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Summary:The transport of oceanic heat towards the Antarctic continental margin is central to the mass balance of the Antarctic Ice Sheet. Recent modeling efforts challenge our view on where and how the on-shelf heat flux occurs, suggesting that it is largest where dense shelf waters cascade down the continental slope. Here we provide observational evidence supporting this claim. Using records from moored instruments, we link the downslope flow of dense water from the Filchner overflow to upslope and on-shelf flow of warm water. Recent modeling challenges our view on where the on-shelf heat flux in Antarctica occurs, suggesting it to be large where dense waters descend the continental slope. The authors provide observational evidence from the Weddell Sea supporting this claim.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-023-36580-3