Ice-Shelf Meltwater Overturning in the Bellingshausen Sea
Hydrographic data are analyzed for the broad continental shelf of the Bellingshausen Sea, which is host to a number of rapidly thinning ice shelves. The flow of warm Circumpolar Deep Water (CDW) onto the continental shelf is observed in the two major glacially carved troughs, the Belgica and Latady...
Published in: | Journal of Geophysical Research: Oceans |
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American Geophysical Union
2021
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ftcaltechauth:oai:authors.library.caltech.edu:109014 2023-05-15T13:24:04+02:00 Ice-Shelf Meltwater Overturning in the Bellingshausen Sea Ruan, Xiaozhou Speer, Kevin G. Thompson, Andrew F. Schulze Chretien, Lena M. Shoosmith, Deborah R. 2021-05 application/pdf https://authors.library.caltech.edu/109014/ https://authors.library.caltech.edu/109014/3/2020JC016957.pdf https://authors.library.caltech.edu/109014/1/2020JC016957.pdf https://resolver.caltech.edu/CaltechAUTHORS:20210507-141844617 en eng American Geophysical Union https://authors.library.caltech.edu/109014/3/2020JC016957.pdf https://authors.library.caltech.edu/109014/1/2020JC016957.pdf Ruan, Xiaozhou and Speer, Kevin G. and Thompson, Andrew F. and Schulze Chretien, Lena M. and Shoosmith, Deborah R. (2021) Ice-Shelf Meltwater Overturning in the Bellingshausen Sea. Journal of Geophysical Research. Oceans, 126 (5). Art. No. e2020JC016957. ISSN 2169-9275. doi:10.1029/2020jc016957. https://resolver.caltech.edu/CaltechAUTHORS:20210507-141844617 <https://resolver.caltech.edu/CaltechAUTHORS:20210507-141844617> other Article PeerReviewed 2021 ftcaltechauth https://doi.org/10.1029/2020jc016957 2021-11-04T18:36:45Z Hydrographic data are analyzed for the broad continental shelf of the Bellingshausen Sea, which is host to a number of rapidly thinning ice shelves. The flow of warm Circumpolar Deep Water (CDW) onto the continental shelf is observed in the two major glacially carved troughs, the Belgica and Latady troughs. Using ship‐based measurements of potential temperature, salinity, and dissolved oxygen, collected across several coast‐to‐coast transects over the Bellingshausen shelf in 2007, the velocity and circulation patterns are inferred based on geostrophic balance and further constrained by the tracer and mass budgets. Meltwater was observed at the surface and at intermediate depth toward the western side of the continental shelf, collocated with inferred outflows. The maximum conversion rate from the dense CDW to lighter water masses by mixing with glacial meltwater is estimated to be 0.37 ± 0.1 Sv in both depth and potential density spaces. This diapycnal overturning is comparable to previous estimates made in the neighboring Amundsen Sea, highlighting the overlooked importance of water mass modification and meltwater production associated with glacial melting in the Bellingshausen Sea. Article in Journal/Newspaper Amundsen Sea Bellingshausen Sea Ice Shelf Ice Shelves Caltech Authors (California Institute of Technology) Amundsen Sea Bellingshausen Sea Latady ENVELOPE(-65.833,-65.833,-75.500,-75.500) Journal of Geophysical Research: Oceans 126 5 |
institution |
Open Polar |
collection |
Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
English |
description |
Hydrographic data are analyzed for the broad continental shelf of the Bellingshausen Sea, which is host to a number of rapidly thinning ice shelves. The flow of warm Circumpolar Deep Water (CDW) onto the continental shelf is observed in the two major glacially carved troughs, the Belgica and Latady troughs. Using ship‐based measurements of potential temperature, salinity, and dissolved oxygen, collected across several coast‐to‐coast transects over the Bellingshausen shelf in 2007, the velocity and circulation patterns are inferred based on geostrophic balance and further constrained by the tracer and mass budgets. Meltwater was observed at the surface and at intermediate depth toward the western side of the continental shelf, collocated with inferred outflows. The maximum conversion rate from the dense CDW to lighter water masses by mixing with glacial meltwater is estimated to be 0.37 ± 0.1 Sv in both depth and potential density spaces. This diapycnal overturning is comparable to previous estimates made in the neighboring Amundsen Sea, highlighting the overlooked importance of water mass modification and meltwater production associated with glacial melting in the Bellingshausen Sea. |
format |
Article in Journal/Newspaper |
author |
Ruan, Xiaozhou Speer, Kevin G. Thompson, Andrew F. Schulze Chretien, Lena M. Shoosmith, Deborah R. |
spellingShingle |
Ruan, Xiaozhou Speer, Kevin G. Thompson, Andrew F. Schulze Chretien, Lena M. Shoosmith, Deborah R. Ice-Shelf Meltwater Overturning in the Bellingshausen Sea |
author_facet |
Ruan, Xiaozhou Speer, Kevin G. Thompson, Andrew F. Schulze Chretien, Lena M. Shoosmith, Deborah R. |
author_sort |
Ruan, Xiaozhou |
title |
Ice-Shelf Meltwater Overturning in the Bellingshausen Sea |
title_short |
Ice-Shelf Meltwater Overturning in the Bellingshausen Sea |
title_full |
Ice-Shelf Meltwater Overturning in the Bellingshausen Sea |
title_fullStr |
Ice-Shelf Meltwater Overturning in the Bellingshausen Sea |
title_full_unstemmed |
Ice-Shelf Meltwater Overturning in the Bellingshausen Sea |
title_sort |
ice-shelf meltwater overturning in the bellingshausen sea |
publisher |
American Geophysical Union |
publishDate |
2021 |
url |
https://authors.library.caltech.edu/109014/ https://authors.library.caltech.edu/109014/3/2020JC016957.pdf https://authors.library.caltech.edu/109014/1/2020JC016957.pdf https://resolver.caltech.edu/CaltechAUTHORS:20210507-141844617 |
long_lat |
ENVELOPE(-65.833,-65.833,-75.500,-75.500) |
geographic |
Amundsen Sea Bellingshausen Sea Latady |
geographic_facet |
Amundsen Sea Bellingshausen Sea Latady |
genre |
Amundsen Sea Bellingshausen Sea Ice Shelf Ice Shelves |
genre_facet |
Amundsen Sea Bellingshausen Sea Ice Shelf Ice Shelves |
op_relation |
https://authors.library.caltech.edu/109014/3/2020JC016957.pdf https://authors.library.caltech.edu/109014/1/2020JC016957.pdf Ruan, Xiaozhou and Speer, Kevin G. and Thompson, Andrew F. and Schulze Chretien, Lena M. and Shoosmith, Deborah R. (2021) Ice-Shelf Meltwater Overturning in the Bellingshausen Sea. Journal of Geophysical Research. Oceans, 126 (5). Art. No. e2020JC016957. ISSN 2169-9275. doi:10.1029/2020jc016957. https://resolver.caltech.edu/CaltechAUTHORS:20210507-141844617 <https://resolver.caltech.edu/CaltechAUTHORS:20210507-141844617> |
op_rights |
other |
op_doi |
https://doi.org/10.1029/2020jc016957 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
126 |
container_issue |
5 |
_version_ |
1766377219673817088 |