Exceptionally Warm and Prolonged Flow of Warm Deep Water Toward the Filchner‐Ronne Ice Shelf in 2017
The Filchner-Ronne Ice Shelf, fringing the southern Weddell Sea, is Antarctica's second largest ice shelf. At present, basal melt rates are low due to active dense water formation; however, model projections suggest a drastic increase in the future due to enhanced inflow of open-ocean warm wate...
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Online Access: | https://epic.awi.de/id/eprint/52579/ https://epic.awi.de/id/eprint/52579/1/Ryan_et_al-2020_GRL.pdf https://doi.org/10.1029/2020GL088119 https://hdl.handle.net/10013/epic.becc4d8b-2668-420c-83eb-06fa3d112d90 |
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ftawi:oai:epic.awi.de:52579 2024-09-15T17:43:08+00:00 Exceptionally Warm and Prolonged Flow of Warm Deep Water Toward the Filchner‐Ronne Ice Shelf in 2017 Ryan, Svenja Hellmer, Hartmut H. Janout, Markus Darelius, Elin Vignes, Lucie Schröder, Michael 2020 application/pdf https://epic.awi.de/id/eprint/52579/ https://epic.awi.de/id/eprint/52579/1/Ryan_et_al-2020_GRL.pdf https://doi.org/10.1029/2020GL088119 https://hdl.handle.net/10013/epic.becc4d8b-2668-420c-83eb-06fa3d112d90 unknown https://epic.awi.de/id/eprint/52579/1/Ryan_et_al-2020_GRL.pdf Ryan, S. , Hellmer, H. H. orcid:0000-0002-9357-9853 , Janout, M. orcid:0000-0003-4908-2855 , Darelius, E. , Vignes, L. and Schröder, M. (2020) Exceptionally Warm and Prolonged Flow of Warm Deep Water Toward the Filchner‐Ronne Ice Shelf in 2017 , Geophysical Research Letters, 47 (13) . doi:10.1029/2020GL088119 <https://doi.org/10.1029/2020GL088119> , hdl:10013/epic.becc4d8b-2668-420c-83eb-06fa3d112d90 EPIC3Geophysical Research Letters, 47(13), ISSN: 0094-8276 Article isiRev 2020 ftawi https://doi.org/10.1029/2020GL088119 2024-06-24T04:24:41Z The Filchner-Ronne Ice Shelf, fringing the southern Weddell Sea, is Antarctica's second largest ice shelf. At present, basal melt rates are low due to active dense water formation; however, model projections suggest a drastic increase in the future due to enhanced inflow of open-ocean warm water. Mooring observations from 2014 to 2016 along the eastern flank of the Filchner Trough (76°S) revealed a distinct seasonal cycle with inflow of Warm Deep Water during summer and autumn. Here we present extended time series showing an exceptionally warm and long inflow in 2017, with maximum temperatures exceeding 0.5°C. Warm temperatures persisted throughout winter, associated with a fresh anomaly, which lead to a change in stratification over the shelf, favoring an earlier inflow in the following summer. We suggest that the fresh anomaly developed upstream after anomalous summer sea ice melting and contributed to a shoaling of the shelf break thermocline. Article in Journal/Newspaper Antarc* Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf Sea ice Weddell Sea Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Geophysical Research Letters 47 13 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
The Filchner-Ronne Ice Shelf, fringing the southern Weddell Sea, is Antarctica's second largest ice shelf. At present, basal melt rates are low due to active dense water formation; however, model projections suggest a drastic increase in the future due to enhanced inflow of open-ocean warm water. Mooring observations from 2014 to 2016 along the eastern flank of the Filchner Trough (76°S) revealed a distinct seasonal cycle with inflow of Warm Deep Water during summer and autumn. Here we present extended time series showing an exceptionally warm and long inflow in 2017, with maximum temperatures exceeding 0.5°C. Warm temperatures persisted throughout winter, associated with a fresh anomaly, which lead to a change in stratification over the shelf, favoring an earlier inflow in the following summer. We suggest that the fresh anomaly developed upstream after anomalous summer sea ice melting and contributed to a shoaling of the shelf break thermocline. |
format |
Article in Journal/Newspaper |
author |
Ryan, Svenja Hellmer, Hartmut H. Janout, Markus Darelius, Elin Vignes, Lucie Schröder, Michael |
spellingShingle |
Ryan, Svenja Hellmer, Hartmut H. Janout, Markus Darelius, Elin Vignes, Lucie Schröder, Michael Exceptionally Warm and Prolonged Flow of Warm Deep Water Toward the Filchner‐Ronne Ice Shelf in 2017 |
author_facet |
Ryan, Svenja Hellmer, Hartmut H. Janout, Markus Darelius, Elin Vignes, Lucie Schröder, Michael |
author_sort |
Ryan, Svenja |
title |
Exceptionally Warm and Prolonged Flow of Warm Deep Water Toward the Filchner‐Ronne Ice Shelf in 2017 |
title_short |
Exceptionally Warm and Prolonged Flow of Warm Deep Water Toward the Filchner‐Ronne Ice Shelf in 2017 |
title_full |
Exceptionally Warm and Prolonged Flow of Warm Deep Water Toward the Filchner‐Ronne Ice Shelf in 2017 |
title_fullStr |
Exceptionally Warm and Prolonged Flow of Warm Deep Water Toward the Filchner‐Ronne Ice Shelf in 2017 |
title_full_unstemmed |
Exceptionally Warm and Prolonged Flow of Warm Deep Water Toward the Filchner‐Ronne Ice Shelf in 2017 |
title_sort |
exceptionally warm and prolonged flow of warm deep water toward the filchner‐ronne ice shelf in 2017 |
publishDate |
2020 |
url |
https://epic.awi.de/id/eprint/52579/ https://epic.awi.de/id/eprint/52579/1/Ryan_et_al-2020_GRL.pdf https://doi.org/10.1029/2020GL088119 https://hdl.handle.net/10013/epic.becc4d8b-2668-420c-83eb-06fa3d112d90 |
genre |
Antarc* Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf Sea ice Weddell Sea |
genre_facet |
Antarc* Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf Sea ice Weddell Sea |
op_source |
EPIC3Geophysical Research Letters, 47(13), ISSN: 0094-8276 |
op_relation |
https://epic.awi.de/id/eprint/52579/1/Ryan_et_al-2020_GRL.pdf Ryan, S. , Hellmer, H. H. orcid:0000-0002-9357-9853 , Janout, M. orcid:0000-0003-4908-2855 , Darelius, E. , Vignes, L. and Schröder, M. (2020) Exceptionally Warm and Prolonged Flow of Warm Deep Water Toward the Filchner‐Ronne Ice Shelf in 2017 , Geophysical Research Letters, 47 (13) . doi:10.1029/2020GL088119 <https://doi.org/10.1029/2020GL088119> , hdl:10013/epic.becc4d8b-2668-420c-83eb-06fa3d112d90 |
op_doi |
https://doi.org/10.1029/2020GL088119 |
container_title |
Geophysical Research Letters |
container_volume |
47 |
container_issue |
13 |
_version_ |
1810489975536353280 |