Sea ice-free corridors for large swell to reach Antarctic ice shelves
Sea ice can attenuate Southern Ocean swell before it reaches Antarctic ice shelves and imposes flexural stresses, which promote calving of outer ice-shelf margins and influence ice shelf stability. An algorithm is developed to identify sea ice-free corridors that connect the open Southern Ocean to A...
Published in: | Environmental Research Letters |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Institute of Physics Publishing Ltd.
2022
|
Subjects: | |
Online Access: | https://doi.org/10.1088/1748-9326/ac5edd http://ecite.utas.edu.au/154019 |
id |
ftunivtasecite:oai:ecite.utas.edu.au:154019 |
---|---|
record_format |
openpolar |
spelling |
ftunivtasecite:oai:ecite.utas.edu.au:154019 2023-06-11T04:04:53+02:00 Sea ice-free corridors for large swell to reach Antarctic ice shelves Teder, NJ Bennetts, LG Reid, PA Massom, RA 2022 application/pdf https://doi.org/10.1088/1748-9326/ac5edd http://ecite.utas.edu.au/154019 en eng Institute of Physics Publishing Ltd. http://ecite.utas.edu.au/154019/1/154019 - Sea ice-free corridors for large swell to reach Antarctic ice shelves.pdf http://dx.doi.org/10.1088/1748-9326/ac5edd Teder, NJ and Bennetts, LG and Reid, PA and Massom, RA, Sea ice-free corridors for large swell to reach Antarctic ice shelves, Environmental Research Letters, 17, (4) Article 045026. ISSN 1748-9326 (2022) [Refereed Article] http://ecite.utas.edu.au/154019 Environmental Sciences Other environmental sciences Other environmental sciences not elsewhere classified Refereed Article PeerReviewed 2022 ftunivtasecite https://doi.org/10.1088/1748-9326/ac5edd 2023-05-01T22:17:49Z Sea ice can attenuate Southern Ocean swell before it reaches Antarctic ice shelves and imposes flexural stresses, which promote calving of outer ice-shelf margins and influence ice shelf stability. An algorithm is developed to identify sea ice-free corridors that connect the open Southern Ocean to Antarctic ice shelves from daily satellite sea ice concentration data between September 1979 and August 2019. Large swell in the corridors available to impact the ice shelves is extracted from spectral wave model hindcast data. For a selection of ice shelves around the Antarctic coastline, corridors are assessed in terms of duration and areal extent. The availability of large swell to impact certain ice shelves through the corridors is evaluated from spectral wave data for daily statistical properties and the number of large swell days per year. Results integrated over a large number of ice shelves are used to assess overall trends. Large variations are found between individual ice shelves for both corridors and available swell, with contrasting trends between the West and East Antarctic Ice Sheet. The findings indicate ice shelves likely to experience prolonged periods of appreciable outer margin flexure due to large swell action, such as the Fimbul, Shackleton and Ross Ice Shelves, which could exacerbate climate-driven weakening and decreasing buttressing capacity, with implications for sea-level rise. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Sea ice Southern Ocean eCite UTAS (University of Tasmania) Antarctic Southern Ocean The Antarctic East Antarctic Ice Sheet Shackleton Environmental Research Letters 17 4 045026 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Environmental Sciences Other environmental sciences Other environmental sciences not elsewhere classified |
spellingShingle |
Environmental Sciences Other environmental sciences Other environmental sciences not elsewhere classified Teder, NJ Bennetts, LG Reid, PA Massom, RA Sea ice-free corridors for large swell to reach Antarctic ice shelves |
topic_facet |
Environmental Sciences Other environmental sciences Other environmental sciences not elsewhere classified |
description |
Sea ice can attenuate Southern Ocean swell before it reaches Antarctic ice shelves and imposes flexural stresses, which promote calving of outer ice-shelf margins and influence ice shelf stability. An algorithm is developed to identify sea ice-free corridors that connect the open Southern Ocean to Antarctic ice shelves from daily satellite sea ice concentration data between September 1979 and August 2019. Large swell in the corridors available to impact the ice shelves is extracted from spectral wave model hindcast data. For a selection of ice shelves around the Antarctic coastline, corridors are assessed in terms of duration and areal extent. The availability of large swell to impact certain ice shelves through the corridors is evaluated from spectral wave data for daily statistical properties and the number of large swell days per year. Results integrated over a large number of ice shelves are used to assess overall trends. Large variations are found between individual ice shelves for both corridors and available swell, with contrasting trends between the West and East Antarctic Ice Sheet. The findings indicate ice shelves likely to experience prolonged periods of appreciable outer margin flexure due to large swell action, such as the Fimbul, Shackleton and Ross Ice Shelves, which could exacerbate climate-driven weakening and decreasing buttressing capacity, with implications for sea-level rise. |
format |
Article in Journal/Newspaper |
author |
Teder, NJ Bennetts, LG Reid, PA Massom, RA |
author_facet |
Teder, NJ Bennetts, LG Reid, PA Massom, RA |
author_sort |
Teder, NJ |
title |
Sea ice-free corridors for large swell to reach Antarctic ice shelves |
title_short |
Sea ice-free corridors for large swell to reach Antarctic ice shelves |
title_full |
Sea ice-free corridors for large swell to reach Antarctic ice shelves |
title_fullStr |
Sea ice-free corridors for large swell to reach Antarctic ice shelves |
title_full_unstemmed |
Sea ice-free corridors for large swell to reach Antarctic ice shelves |
title_sort |
sea ice-free corridors for large swell to reach antarctic ice shelves |
publisher |
Institute of Physics Publishing Ltd. |
publishDate |
2022 |
url |
https://doi.org/10.1088/1748-9326/ac5edd http://ecite.utas.edu.au/154019 |
geographic |
Antarctic Southern Ocean The Antarctic East Antarctic Ice Sheet Shackleton |
geographic_facet |
Antarctic Southern Ocean The Antarctic East Antarctic Ice Sheet Shackleton |
genre |
Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Sea ice Southern Ocean |
op_relation |
http://ecite.utas.edu.au/154019/1/154019 - Sea ice-free corridors for large swell to reach Antarctic ice shelves.pdf http://dx.doi.org/10.1088/1748-9326/ac5edd Teder, NJ and Bennetts, LG and Reid, PA and Massom, RA, Sea ice-free corridors for large swell to reach Antarctic ice shelves, Environmental Research Letters, 17, (4) Article 045026. ISSN 1748-9326 (2022) [Refereed Article] http://ecite.utas.edu.au/154019 |
op_doi |
https://doi.org/10.1088/1748-9326/ac5edd |
container_title |
Environmental Research Letters |
container_volume |
17 |
container_issue |
4 |
container_start_page |
045026 |
_version_ |
1768391534560935936 |