Necessary Conditions for Warm Inflow Toward the Filchner Ice Shelf, Weddell Sea
Understanding changes in Antarctic ice shelf basal melting is a major challenge for predicting future sea level. Currently, warm Circumpolar Deep Water surrounding Antarctica has limited access to the Weddell Sea continental shelf; consequently, melt rates at Filchner‐Ronne Ice Shelf are low. Howeve...
Published in: | Geophysical Research Letters |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2020
|
Subjects: | |
Online Access: | https://hdl.handle.net/11250/2733111 https://doi.org/10.1029/2020GL089237 |
id |
ftunivbergen:oai:bora.uib.no:11250/2733111 |
---|---|
record_format |
openpolar |
spelling |
ftunivbergen:oai:bora.uib.no:11250/2733111 2023-05-15T13:59:52+02:00 Necessary Conditions for Warm Inflow Toward the Filchner Ice Shelf, Weddell Sea Daae, Kjersti Hattermann, Tore Darelius, Elin Maria K. Mueller, Rachael D. Naughten, Kaitlin A Timmermann, Ralph Hellmer, Hartmut H. 2020 application/pdf https://hdl.handle.net/11250/2733111 https://doi.org/10.1029/2020GL089237 eng eng Wiley Notur/NorStore: NN9608K Norges forskningsråd: 247699 Norges forskningsråd: 267660 Norges forskningsråd: 229764 Norges forskningsråd: 231549 urn:issn:0094-8276 https://hdl.handle.net/11250/2733111 https://doi.org/10.1029/2020GL089237 cristin:1848395 Geophysical Research Letters. 2020, 47 (22), e2020GL089237. Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no ©2020. The Authors. e2020GL089237 Geophysical Research Letters 47 22 Journal article Peer reviewed 2020 ftunivbergen https://doi.org/10.1029/2020GL089237 2023-03-14T17:39:50Z Understanding changes in Antarctic ice shelf basal melting is a major challenge for predicting future sea level. Currently, warm Circumpolar Deep Water surrounding Antarctica has limited access to the Weddell Sea continental shelf; consequently, melt rates at Filchner‐Ronne Ice Shelf are low. However, large‐scale model projections suggest that changes to the Antarctic Slope Front and the coastal circulation may enhance warm inflows within this century. We use a regional high‐resolution ice shelf cavity and ocean circulation model to explore forcing changes that may trigger this regime shift. Our results suggest two necessary conditions for supporting a sustained warm inflow into the Filchner Ice Shelf cavity: (i) an extreme relaxation of the Antarctic Slope Front density gradient and (ii) substantial freshening of the dense shelf water. We also find that the on‐shelf transport over the western Weddell Sea shelf is sensitive to the Filchner Trough overflow characteristics. publishedVersion Article in Journal/Newspaper Antarc* Antarctic Antarctica Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf Weddell Sea University of Bergen: Bergen Open Research Archive (BORA-UiB) Antarctic Filchner Ice Shelf ENVELOPE(-40.000,-40.000,-79.000,-79.000) Filchner Trough ENVELOPE(-36.000,-36.000,-77.000,-77.000) Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) The Antarctic Weddell Weddell Sea Geophysical Research Letters 47 22 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
Understanding changes in Antarctic ice shelf basal melting is a major challenge for predicting future sea level. Currently, warm Circumpolar Deep Water surrounding Antarctica has limited access to the Weddell Sea continental shelf; consequently, melt rates at Filchner‐Ronne Ice Shelf are low. However, large‐scale model projections suggest that changes to the Antarctic Slope Front and the coastal circulation may enhance warm inflows within this century. We use a regional high‐resolution ice shelf cavity and ocean circulation model to explore forcing changes that may trigger this regime shift. Our results suggest two necessary conditions for supporting a sustained warm inflow into the Filchner Ice Shelf cavity: (i) an extreme relaxation of the Antarctic Slope Front density gradient and (ii) substantial freshening of the dense shelf water. We also find that the on‐shelf transport over the western Weddell Sea shelf is sensitive to the Filchner Trough overflow characteristics. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Daae, Kjersti Hattermann, Tore Darelius, Elin Maria K. Mueller, Rachael D. Naughten, Kaitlin A Timmermann, Ralph Hellmer, Hartmut H. |
spellingShingle |
Daae, Kjersti Hattermann, Tore Darelius, Elin Maria K. Mueller, Rachael D. Naughten, Kaitlin A Timmermann, Ralph Hellmer, Hartmut H. Necessary Conditions for Warm Inflow Toward the Filchner Ice Shelf, Weddell Sea |
author_facet |
Daae, Kjersti Hattermann, Tore Darelius, Elin Maria K. Mueller, Rachael D. Naughten, Kaitlin A Timmermann, Ralph Hellmer, Hartmut H. |
author_sort |
Daae, Kjersti |
title |
Necessary Conditions for Warm Inflow Toward the Filchner Ice Shelf, Weddell Sea |
title_short |
Necessary Conditions for Warm Inflow Toward the Filchner Ice Shelf, Weddell Sea |
title_full |
Necessary Conditions for Warm Inflow Toward the Filchner Ice Shelf, Weddell Sea |
title_fullStr |
Necessary Conditions for Warm Inflow Toward the Filchner Ice Shelf, Weddell Sea |
title_full_unstemmed |
Necessary Conditions for Warm Inflow Toward the Filchner Ice Shelf, Weddell Sea |
title_sort |
necessary conditions for warm inflow toward the filchner ice shelf, weddell sea |
publisher |
Wiley |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2733111 https://doi.org/10.1029/2020GL089237 |
long_lat |
ENVELOPE(-40.000,-40.000,-79.000,-79.000) ENVELOPE(-36.000,-36.000,-77.000,-77.000) ENVELOPE(-61.000,-61.000,-78.500,-78.500) |
geographic |
Antarctic Filchner Ice Shelf Filchner Trough Ronne Ice Shelf The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Filchner Ice Shelf Filchner Trough Ronne Ice Shelf The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctica Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf Weddell Sea |
op_source |
e2020GL089237 Geophysical Research Letters 47 22 |
op_relation |
Notur/NorStore: NN9608K Norges forskningsråd: 247699 Norges forskningsråd: 267660 Norges forskningsråd: 229764 Norges forskningsråd: 231549 urn:issn:0094-8276 https://hdl.handle.net/11250/2733111 https://doi.org/10.1029/2020GL089237 cristin:1848395 Geophysical Research Letters. 2020, 47 (22), e2020GL089237. |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no ©2020. The Authors. |
op_doi |
https://doi.org/10.1029/2020GL089237 |
container_title |
Geophysical Research Letters |
container_volume |
47 |
container_issue |
22 |
_version_ |
1766268799629131776 |