FRIS revisited in 2018: on the circulation and water masses at the Filchner and Ronne Ice Shelves in the Southern Weddell Sea
© The Author(s), 2021. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Janout, M. A., Hellmer, H. H., Hattermann, T., Huhn, O., Sueltenfuss, J., Osterhus, S., Stulic, L., Ryan, S., Schroeder, M., & Kanzow, T. FRIS r...
Published in: | Journal of Geophysical Research: Oceans |
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American Geophysical Union
2021
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Online Access: | https://hdl.handle.net/1912/27598 |
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/27598 2023-05-15T16:13:14+02:00 FRIS revisited in 2018: on the circulation and water masses at the Filchner and Ronne Ice Shelves in the Southern Weddell Sea Janout, Markus A. Hellmer, Hartmut H. Hattermann, Tore Huhn, Oliver Sultenfuß, Jurgen Østerhus, Svein Stulic, Lukrecia Ryan, Svenja Schröder, Michael Kanzow, Torsten 2021-05-18 https://hdl.handle.net/1912/27598 unknown American Geophysical Union https://doi.org/10.1029/2021JC017269 Janout, M. A., Hellmer, H. H., Hattermann, T., Huhn, O., Sueltenfuss, J., Osterhus, S., Stulic, L., Ryan, S., Schroeder, M., & Kanzow, T. (2021). FRIS revisited in 2018: on the circulation and water masses at the Filchner and Ronne Ice Shelves in the Southern Weddell Sea. Journal of Geophysical Research: Oceans, 126(6), e2021JC017269. https://hdl.handle.net/1912/27598 doi:10.1029/2021JC017269 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ CC-BY Janout, M. A., Hellmer, H. H., Hattermann, T., Huhn, O., Sueltenfuss, J., Osterhus, S., Stulic, L., Ryan, S., Schroeder, M., & Kanzow, T. (2021). FRIS revisited in 2018: on the circulation and water masses at the Filchner and Ronne Ice Shelves in the Southern Weddell Sea. Journal of Geophysical Research: Oceans, 126(6), e2021JC017269. doi:10.1029/2021JC017269 Ocean circulation Ocean-ice shelf interaction Water masses Weddell Sea Filcher and Ronne shelves Article 2021 ftwhoas https://doi.org/10.1029/2021JC017269 2022-10-29T22:57:24Z © The Author(s), 2021. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Janout, M. A., Hellmer, H. H., Hattermann, T., Huhn, O., Sueltenfuss, J., Osterhus, S., Stulic, L., Ryan, S., Schroeder, M., & Kanzow, T. FRIS revisited in 2018: on the circulation and water masses at the Filchner and Ronne Ice Shelves in the Southern Weddell Sea. Journal of Geophysical Research: Oceans, 126(6), (2021): e2021JC017269, https://doi.org/10.1029/2021JC017269. The Filchner-Ronne Ice Shelf (FRIS) is characterized by moderate basal melt rates due to the near-freezing waters that dominate the wide southern Weddell Sea continental shelf. We revisited the region in austral summer 2018 with detailed hydrographic and noble gas surveys along FRIS. The FRIS front was characterized by High Salinity Shelf Water (HSSW) in Ronne Depression, Ice Shelf Water (ISW) on its eastern flank, and an inflow of modified Warm Deep Water (mWDW) entering through Central Trough. Filchner Trough was dominated by Ronne HSSW-sourced ISW, likely forced by a recently intensified circulation beneath FRIS due to enhanced sea ice production in the Ronne polynya since 2015. Glacial meltwater fractions and tracer-based water mass dating indicate two separate ISW outflow cores, one hugging the Berkner slope after a two-year travel time, and the other located in the central Filchner Trough following a ∼six year-long transit through the FRIS cavity. Historical measurements indicate the presence of two distinct modes, in which water masses in Filchner Trough were dominated by either Ronne HSSW-derived ISW (Ronne-mode) or more locally derived Berkner-HSSW (Berkner-mode). While the dominance of these modes has alternated on interannual time scales, ocean densities in Filchner Trough have remained remarkably stable since the first surveys in 1980. Indeed, geostrophic velocities indicated outflowing ISW-cores along the trough's western flank and onto Berkner Bank, which suggests that ... Article in Journal/Newspaper Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ice Shelves Ronne Ice Shelf Sea ice Weddell Sea Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Austral Berkner Bank ENVELOPE(-48.000,-48.000,-75.000,-75.000) Filchner Trough ENVELOPE(-36.000,-36.000,-77.000,-77.000) Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) Weddell Weddell Sea Journal of Geophysical Research: Oceans 126 6 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
unknown |
topic |
Ocean circulation Ocean-ice shelf interaction Water masses Weddell Sea Filcher and Ronne shelves |
spellingShingle |
Ocean circulation Ocean-ice shelf interaction Water masses Weddell Sea Filcher and Ronne shelves Janout, Markus A. Hellmer, Hartmut H. Hattermann, Tore Huhn, Oliver Sultenfuß, Jurgen Østerhus, Svein Stulic, Lukrecia Ryan, Svenja Schröder, Michael Kanzow, Torsten FRIS revisited in 2018: on the circulation and water masses at the Filchner and Ronne Ice Shelves in the Southern Weddell Sea |
topic_facet |
Ocean circulation Ocean-ice shelf interaction Water masses Weddell Sea Filcher and Ronne shelves |
description |
© The Author(s), 2021. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Janout, M. A., Hellmer, H. H., Hattermann, T., Huhn, O., Sueltenfuss, J., Osterhus, S., Stulic, L., Ryan, S., Schroeder, M., & Kanzow, T. FRIS revisited in 2018: on the circulation and water masses at the Filchner and Ronne Ice Shelves in the Southern Weddell Sea. Journal of Geophysical Research: Oceans, 126(6), (2021): e2021JC017269, https://doi.org/10.1029/2021JC017269. The Filchner-Ronne Ice Shelf (FRIS) is characterized by moderate basal melt rates due to the near-freezing waters that dominate the wide southern Weddell Sea continental shelf. We revisited the region in austral summer 2018 with detailed hydrographic and noble gas surveys along FRIS. The FRIS front was characterized by High Salinity Shelf Water (HSSW) in Ronne Depression, Ice Shelf Water (ISW) on its eastern flank, and an inflow of modified Warm Deep Water (mWDW) entering through Central Trough. Filchner Trough was dominated by Ronne HSSW-sourced ISW, likely forced by a recently intensified circulation beneath FRIS due to enhanced sea ice production in the Ronne polynya since 2015. Glacial meltwater fractions and tracer-based water mass dating indicate two separate ISW outflow cores, one hugging the Berkner slope after a two-year travel time, and the other located in the central Filchner Trough following a ∼six year-long transit through the FRIS cavity. Historical measurements indicate the presence of two distinct modes, in which water masses in Filchner Trough were dominated by either Ronne HSSW-derived ISW (Ronne-mode) or more locally derived Berkner-HSSW (Berkner-mode). While the dominance of these modes has alternated on interannual time scales, ocean densities in Filchner Trough have remained remarkably stable since the first surveys in 1980. Indeed, geostrophic velocities indicated outflowing ISW-cores along the trough's western flank and onto Berkner Bank, which suggests that ... |
format |
Article in Journal/Newspaper |
author |
Janout, Markus A. Hellmer, Hartmut H. Hattermann, Tore Huhn, Oliver Sultenfuß, Jurgen Østerhus, Svein Stulic, Lukrecia Ryan, Svenja Schröder, Michael Kanzow, Torsten |
author_facet |
Janout, Markus A. Hellmer, Hartmut H. Hattermann, Tore Huhn, Oliver Sultenfuß, Jurgen Østerhus, Svein Stulic, Lukrecia Ryan, Svenja Schröder, Michael Kanzow, Torsten |
author_sort |
Janout, Markus A. |
title |
FRIS revisited in 2018: on the circulation and water masses at the Filchner and Ronne Ice Shelves in the Southern Weddell Sea |
title_short |
FRIS revisited in 2018: on the circulation and water masses at the Filchner and Ronne Ice Shelves in the Southern Weddell Sea |
title_full |
FRIS revisited in 2018: on the circulation and water masses at the Filchner and Ronne Ice Shelves in the Southern Weddell Sea |
title_fullStr |
FRIS revisited in 2018: on the circulation and water masses at the Filchner and Ronne Ice Shelves in the Southern Weddell Sea |
title_full_unstemmed |
FRIS revisited in 2018: on the circulation and water masses at the Filchner and Ronne Ice Shelves in the Southern Weddell Sea |
title_sort |
fris revisited in 2018: on the circulation and water masses at the filchner and ronne ice shelves in the southern weddell sea |
publisher |
American Geophysical Union |
publishDate |
2021 |
url |
https://hdl.handle.net/1912/27598 |
long_lat |
ENVELOPE(-48.000,-48.000,-75.000,-75.000) ENVELOPE(-36.000,-36.000,-77.000,-77.000) ENVELOPE(-61.000,-61.000,-78.500,-78.500) |
geographic |
Austral Berkner Bank Filchner Trough Ronne Ice Shelf Weddell Weddell Sea |
geographic_facet |
Austral Berkner Bank Filchner Trough Ronne Ice Shelf Weddell Weddell Sea |
genre |
Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ice Shelves Ronne Ice Shelf Sea ice Weddell Sea |
genre_facet |
Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ice Shelves Ronne Ice Shelf Sea ice Weddell Sea |
op_source |
Janout, M. A., Hellmer, H. H., Hattermann, T., Huhn, O., Sueltenfuss, J., Osterhus, S., Stulic, L., Ryan, S., Schroeder, M., & Kanzow, T. (2021). FRIS revisited in 2018: on the circulation and water masses at the Filchner and Ronne Ice Shelves in the Southern Weddell Sea. Journal of Geophysical Research: Oceans, 126(6), e2021JC017269. doi:10.1029/2021JC017269 |
op_relation |
https://doi.org/10.1029/2021JC017269 Janout, M. A., Hellmer, H. H., Hattermann, T., Huhn, O., Sueltenfuss, J., Osterhus, S., Stulic, L., Ryan, S., Schroeder, M., & Kanzow, T. (2021). FRIS revisited in 2018: on the circulation and water masses at the Filchner and Ronne Ice Shelves in the Southern Weddell Sea. Journal of Geophysical Research: Oceans, 126(6), e2021JC017269. https://hdl.handle.net/1912/27598 doi:10.1029/2021JC017269 |
op_rights |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2021JC017269 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
126 |
container_issue |
6 |
_version_ |
1765998891557191680 |