Intermittent Reduction in Ocean Heat Transport Into the Getz Ice Shelf Cavity During Strong Wind Events
The flow of warm water toward the western Getz Ice Shelf along the Siple Trough, West Antarctica, is intermittently disrupted during short events of Winter Water deepening. Here we show, using mooring records, that these 5–10 days-long events reduced the heat transport toward the ice shelf cavity by...
Published in: | Geophysical Research Letters |
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Online Access: | https://hdl.handle.net/11250/2770128 https://doi.org/10.1029/2021GL093599 |
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ftimr:oai:imr.brage.unit.no:11250/2770128 2023-05-15T13:44:00+02:00 Intermittent Reduction in Ocean Heat Transport Into the Getz Ice Shelf Cavity During Strong Wind Events Steiger, Nadine Darelius, Elin Wåhlin, Anna Assmann, Karen Margarete 2021 application/pdf https://hdl.handle.net/11250/2770128 https://doi.org/10.1029/2021GL093599 eng eng Norges forskningsråd: 267660 Geophysical Research Letters. 2021, 48 (14), 1-11. urn:issn:0094-8276 https://hdl.handle.net/11250/2770128 https://doi.org/10.1029/2021GL093599 cristin:1926259 1-11 48 Geophysical Research Letters 14 Peer reviewed Journal article 2021 ftimr https://doi.org/10.1029/2021GL093599 2021-09-23T20:16:05Z The flow of warm water toward the western Getz Ice Shelf along the Siple Trough, West Antarctica, is intermittently disrupted during short events of Winter Water deepening. Here we show, using mooring records, that these 5–10 days-long events reduced the heat transport toward the ice shelf cavity by 25% in the winter of 2016. The events coincide with strong easterly winds and polynya opening in the region, but the Winter Water deepening is controlled by non-local coastal Ekman downwelling rather than polynya-related surface fluxes. The thermocline depth anomalies are forced by Ekman downwelling at the northern coast of Siple Island and propagate to the ice front as a coastal trapped wave. During the events, the flow at depth does no longer continue along isobaths into the ice shelf cavity but aligns with the ice front. publishedVersion Article in Journal/Newspaper Antarc* Antarctica Getz Ice Shelf Ice Shelf Siple Island West Antarctica Institute for Marine Research: Brage IMR West Antarctica Siple ENVELOPE(-83.917,-83.917,-75.917,-75.917) Getz ENVELOPE(-145.217,-145.217,-76.550,-76.550) Getz Ice Shelf ENVELOPE(-126.500,-126.500,-74.250,-74.250) Siple Island ENVELOPE(-125.200,-125.200,-73.733,-73.733) Geophysical Research Letters 48 14 |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
description |
The flow of warm water toward the western Getz Ice Shelf along the Siple Trough, West Antarctica, is intermittently disrupted during short events of Winter Water deepening. Here we show, using mooring records, that these 5–10 days-long events reduced the heat transport toward the ice shelf cavity by 25% in the winter of 2016. The events coincide with strong easterly winds and polynya opening in the region, but the Winter Water deepening is controlled by non-local coastal Ekman downwelling rather than polynya-related surface fluxes. The thermocline depth anomalies are forced by Ekman downwelling at the northern coast of Siple Island and propagate to the ice front as a coastal trapped wave. During the events, the flow at depth does no longer continue along isobaths into the ice shelf cavity but aligns with the ice front. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Steiger, Nadine Darelius, Elin Wåhlin, Anna Assmann, Karen Margarete |
spellingShingle |
Steiger, Nadine Darelius, Elin Wåhlin, Anna Assmann, Karen Margarete Intermittent Reduction in Ocean Heat Transport Into the Getz Ice Shelf Cavity During Strong Wind Events |
author_facet |
Steiger, Nadine Darelius, Elin Wåhlin, Anna Assmann, Karen Margarete |
author_sort |
Steiger, Nadine |
title |
Intermittent Reduction in Ocean Heat Transport Into the Getz Ice Shelf Cavity During Strong Wind Events |
title_short |
Intermittent Reduction in Ocean Heat Transport Into the Getz Ice Shelf Cavity During Strong Wind Events |
title_full |
Intermittent Reduction in Ocean Heat Transport Into the Getz Ice Shelf Cavity During Strong Wind Events |
title_fullStr |
Intermittent Reduction in Ocean Heat Transport Into the Getz Ice Shelf Cavity During Strong Wind Events |
title_full_unstemmed |
Intermittent Reduction in Ocean Heat Transport Into the Getz Ice Shelf Cavity During Strong Wind Events |
title_sort |
intermittent reduction in ocean heat transport into the getz ice shelf cavity during strong wind events |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2770128 https://doi.org/10.1029/2021GL093599 |
long_lat |
ENVELOPE(-83.917,-83.917,-75.917,-75.917) ENVELOPE(-145.217,-145.217,-76.550,-76.550) ENVELOPE(-126.500,-126.500,-74.250,-74.250) ENVELOPE(-125.200,-125.200,-73.733,-73.733) |
geographic |
West Antarctica Siple Getz Getz Ice Shelf Siple Island |
geographic_facet |
West Antarctica Siple Getz Getz Ice Shelf Siple Island |
genre |
Antarc* Antarctica Getz Ice Shelf Ice Shelf Siple Island West Antarctica |
genre_facet |
Antarc* Antarctica Getz Ice Shelf Ice Shelf Siple Island West Antarctica |
op_source |
1-11 48 Geophysical Research Letters 14 |
op_relation |
Norges forskningsråd: 267660 Geophysical Research Letters. 2021, 48 (14), 1-11. urn:issn:0094-8276 https://hdl.handle.net/11250/2770128 https://doi.org/10.1029/2021GL093599 cristin:1926259 |
op_doi |
https://doi.org/10.1029/2021GL093599 |
container_title |
Geophysical Research Letters |
container_volume |
48 |
container_issue |
14 |
_version_ |
1766195851425742848 |