Ocean variability beneath Thwaites Eastern Ice Shelf driven by the Pine Island Bay Gyre strength
West Antarctic ice-shelf thinning is primarily caused by ocean-driven basal melting. Here we assess ocean variability below Thwaites Eastern Ice Shelf (TEIS) and reveal the importance of local ocean circulation and sea-ice. Measurements obtained from two sub-ice-shelf moorings, spanning January 2020...
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Online Access: | https://research-portal.st-andrews.ac.uk/en/researchoutput/ocean-variability-beneath-thwaites-eastern-ice-shelf-driven-by-the-pine-island-bay-gyre-strength(ffca1fe4-69da-42f8-a8ca-c865d56bacfc).html https://doi.org/10.1038/s41467-022-35499-5 https://research-repository.st-andrews.ac.uk/bitstream/10023/26648/1/Dotto_2022_NC_Ocean_variability_CC.pdf https://doi.org/10.21203/rs.3.rs-1466534/v1 |
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ftunstandrewcris:oai:research-portal.st-andrews.ac.uk:publications/ffca1fe4-69da-42f8-a8ca-c865d56bacfc 2024-09-15T17:47:37+00:00 Ocean variability beneath Thwaites Eastern Ice Shelf driven by the Pine Island Bay Gyre strength Dotto, Tiago S. Heywood, Karen J. Hall, Rob A. Scambos, Ted A. Zheng, Yixi Nakayama, Yoshihiro Hyogo, Shuntaro Snow, Tasha Wahlin, Anna K. Wild, Christian Truffer, Martin Muto, Atsuhiro Alley, Karen E. Boehme, Lars Bortolotto, Guilherme A. Tyler, Scott W. Pettit, Erin 2022-12-21 application/pdf https://research-portal.st-andrews.ac.uk/en/researchoutput/ocean-variability-beneath-thwaites-eastern-ice-shelf-driven-by-the-pine-island-bay-gyre-strength(ffca1fe4-69da-42f8-a8ca-c865d56bacfc).html https://doi.org/10.1038/s41467-022-35499-5 https://research-repository.st-andrews.ac.uk/bitstream/10023/26648/1/Dotto_2022_NC_Ocean_variability_CC.pdf https://doi.org/10.21203/rs.3.rs-1466534/v1 eng eng https://research-portal.st-andrews.ac.uk/en/researchoutput/ocean-variability-beneath-thwaites-eastern-ice-shelf-driven-by-the-pine-island-bay-gyre-strength(ffca1fe4-69da-42f8-a8ca-c865d56bacfc).html info:eu-repo/semantics/openAccess Dotto , T S , Heywood , K J , Hall , R A , Scambos , T A , Zheng , Y , Nakayama , Y , Hyogo , S , Snow , T , Wahlin , A K , Wild , C , Truffer , M , Muto , A , Alley , K E , Boehme , L , Bortolotto , G A , Tyler , S W & Pettit , E 2022 , ' Ocean variability beneath Thwaites Eastern Ice Shelf driven by the Pine Island Bay Gyre strength ' , Nature Communications , vol. 13 , 7840 . https://doi.org/10.1038/s41467-022-35499-5 article 2022 ftunstandrewcris https://doi.org/10.1038/s41467-022-35499-510.21203/rs.3.rs-1466534/v1 2024-06-26T23:33:42Z West Antarctic ice-shelf thinning is primarily caused by ocean-driven basal melting. Here we assess ocean variability below Thwaites Eastern Ice Shelf (TEIS) and reveal the importance of local ocean circulation and sea-ice. Measurements obtained from two sub-ice-shelf moorings, spanning January 2020 to March 2021, show warming of the ice-shelf cavity and an increase in meltwater fraction of the upper sub-ice layer. Combined with ocean modelling results, our observations suggest that meltwater from Pine Island Ice Shelf feeds into the TEIS cavity, adding to horizontal heat transport there. We propose that a weakening of the Pine Island Bay gyre caused by prolonged sea-ice cover from April 2020 to March 2021 allowed meltwater-enriched waters to enter the TEIS cavity, which increased the temperature of the upper layer. Our study highlights the sensitivity of ocean circulation beneath ice shelves to local atmosphere-sea-ice-ocean forcing in neighbouring open oceans. Article in Journal/Newspaper Antarc* Antarctic Ice Shelf Ice Shelves Pine Island Bay Sea ice University of St Andrews: Research Portal |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
description |
West Antarctic ice-shelf thinning is primarily caused by ocean-driven basal melting. Here we assess ocean variability below Thwaites Eastern Ice Shelf (TEIS) and reveal the importance of local ocean circulation and sea-ice. Measurements obtained from two sub-ice-shelf moorings, spanning January 2020 to March 2021, show warming of the ice-shelf cavity and an increase in meltwater fraction of the upper sub-ice layer. Combined with ocean modelling results, our observations suggest that meltwater from Pine Island Ice Shelf feeds into the TEIS cavity, adding to horizontal heat transport there. We propose that a weakening of the Pine Island Bay gyre caused by prolonged sea-ice cover from April 2020 to March 2021 allowed meltwater-enriched waters to enter the TEIS cavity, which increased the temperature of the upper layer. Our study highlights the sensitivity of ocean circulation beneath ice shelves to local atmosphere-sea-ice-ocean forcing in neighbouring open oceans. |
format |
Article in Journal/Newspaper |
author |
Dotto, Tiago S. Heywood, Karen J. Hall, Rob A. Scambos, Ted A. Zheng, Yixi Nakayama, Yoshihiro Hyogo, Shuntaro Snow, Tasha Wahlin, Anna K. Wild, Christian Truffer, Martin Muto, Atsuhiro Alley, Karen E. Boehme, Lars Bortolotto, Guilherme A. Tyler, Scott W. Pettit, Erin |
spellingShingle |
Dotto, Tiago S. Heywood, Karen J. Hall, Rob A. Scambos, Ted A. Zheng, Yixi Nakayama, Yoshihiro Hyogo, Shuntaro Snow, Tasha Wahlin, Anna K. Wild, Christian Truffer, Martin Muto, Atsuhiro Alley, Karen E. Boehme, Lars Bortolotto, Guilherme A. Tyler, Scott W. Pettit, Erin Ocean variability beneath Thwaites Eastern Ice Shelf driven by the Pine Island Bay Gyre strength |
author_facet |
Dotto, Tiago S. Heywood, Karen J. Hall, Rob A. Scambos, Ted A. Zheng, Yixi Nakayama, Yoshihiro Hyogo, Shuntaro Snow, Tasha Wahlin, Anna K. Wild, Christian Truffer, Martin Muto, Atsuhiro Alley, Karen E. Boehme, Lars Bortolotto, Guilherme A. Tyler, Scott W. Pettit, Erin |
author_sort |
Dotto, Tiago S. |
title |
Ocean variability beneath Thwaites Eastern Ice Shelf driven by the Pine Island Bay Gyre strength |
title_short |
Ocean variability beneath Thwaites Eastern Ice Shelf driven by the Pine Island Bay Gyre strength |
title_full |
Ocean variability beneath Thwaites Eastern Ice Shelf driven by the Pine Island Bay Gyre strength |
title_fullStr |
Ocean variability beneath Thwaites Eastern Ice Shelf driven by the Pine Island Bay Gyre strength |
title_full_unstemmed |
Ocean variability beneath Thwaites Eastern Ice Shelf driven by the Pine Island Bay Gyre strength |
title_sort |
ocean variability beneath thwaites eastern ice shelf driven by the pine island bay gyre strength |
publishDate |
2022 |
url |
https://research-portal.st-andrews.ac.uk/en/researchoutput/ocean-variability-beneath-thwaites-eastern-ice-shelf-driven-by-the-pine-island-bay-gyre-strength(ffca1fe4-69da-42f8-a8ca-c865d56bacfc).html https://doi.org/10.1038/s41467-022-35499-5 https://research-repository.st-andrews.ac.uk/bitstream/10023/26648/1/Dotto_2022_NC_Ocean_variability_CC.pdf https://doi.org/10.21203/rs.3.rs-1466534/v1 |
genre |
Antarc* Antarctic Ice Shelf Ice Shelves Pine Island Bay Sea ice |
genre_facet |
Antarc* Antarctic Ice Shelf Ice Shelves Pine Island Bay Sea ice |
op_source |
Dotto , T S , Heywood , K J , Hall , R A , Scambos , T A , Zheng , Y , Nakayama , Y , Hyogo , S , Snow , T , Wahlin , A K , Wild , C , Truffer , M , Muto , A , Alley , K E , Boehme , L , Bortolotto , G A , Tyler , S W & Pettit , E 2022 , ' Ocean variability beneath Thwaites Eastern Ice Shelf driven by the Pine Island Bay Gyre strength ' , Nature Communications , vol. 13 , 7840 . https://doi.org/10.1038/s41467-022-35499-5 |
op_relation |
https://research-portal.st-andrews.ac.uk/en/researchoutput/ocean-variability-beneath-thwaites-eastern-ice-shelf-driven-by-the-pine-island-bay-gyre-strength(ffca1fe4-69da-42f8-a8ca-c865d56bacfc).html |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41467-022-35499-510.21203/rs.3.rs-1466534/v1 |
_version_ |
1810497074534285312 |