Ocean/ice shelf interaction in the southern Weddell Sea: results of a regional numerical helium/neon simulation
Ocean/ice interaction at the base of deep drafted Antarctic ice shelves modifies the physical properties of inflowing shelf waters to become Ice Shelf Water (ISW).In contrast to the conditions at the atmosphere/ocean interface, the increased hydrostaticpressure at the glacial base causes gases embed...
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ftawi:oai:epic.awi.de:12810 2023-09-05T13:15:15+02:00 Ocean/ice shelf interaction in the southern Weddell Sea: results of a regional numerical helium/neon simulation Rodehacke, Christian Hellmer, Hartmut Huhn, O. Beckmann, A. 2006 application/pdf https://epic.awi.de/id/eprint/12810/ https://epic.awi.de/id/eprint/12810/1/Rod2005a.pdf https://doi.org/10.1007/s10236-006-0073-2 https://hdl.handle.net/10013/epic.23220 https://hdl.handle.net/10013/epic.23220.d001 unknown https://epic.awi.de/id/eprint/12810/1/Rod2005a.pdf https://hdl.handle.net/10013/epic.23220.d001 Rodehacke, C. orcid:0000-0003-3110-3857 , Hellmer, H. orcid:0000-0002-9357-9853 , Huhn, O. and Beckmann, A. (2006) Ocean/ice shelf interaction in the southern Weddell Sea: results of a regional numerical helium/neon simulation , Ocean dynamics . doi:10.1007/s10236-006-0073-2 <https://doi.org/10.1007/s10236-006-0073-2> , hdl:10013/epic.23220 EPIC3Ocean dynamics, ISBN: 1616-7341 (Paper) 16 Article isiRev 2006 ftawi https://doi.org/10.1007/s10236-006-0073-2 2023-08-22T19:50:10Z Ocean/ice interaction at the base of deep drafted Antarctic ice shelves modifies the physical properties of inflowing shelf waters to become Ice Shelf Water (ISW).In contrast to the conditions at the atmosphere/ocean interface, the increased hydrostaticpressure at the glacial base causes gases embedded in the ice to solve completely after being released by melting. Helium and neon with an extremely low solubility are supersatured in glacial meltwater by more than 1000%. At the continentalslope in front of the large Antarctic caverns ISW mixes with ambient waters toform different precursors of Antarctic Bottom Water. A regional ocean circulation model is presented which uses an explicit formulation of the ocean/ice shelf interaction to describe for the first time the input of noble gases to the Southern Ocean. The results reveal a long-term variability of the basal mass loss solely controlled by the interaction between waters of the continental shelf and the ice shelf cavern. Modeled helium and neon supersaturations from the Filchner-Ronne Ice Shelf front reveal a "low-pass" filtering of the inflowing signal due to cavern processes. On circumpolar scales the helium and neon distributions in the Southern Ocean quantify the ISW contribution to bottom water which spreads with the coastal current connecting the major formation sites in Ross and Weddell Seas. Article in Journal/Newspaper Antarc* Antarctic Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ice Shelves Ronne Ice Shelf Southern Ocean Weddell Sea Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) Southern Ocean Weddell Weddell Sea Ocean Dynamics 57 1 1 11 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Ocean/ice interaction at the base of deep drafted Antarctic ice shelves modifies the physical properties of inflowing shelf waters to become Ice Shelf Water (ISW).In contrast to the conditions at the atmosphere/ocean interface, the increased hydrostaticpressure at the glacial base causes gases embedded in the ice to solve completely after being released by melting. Helium and neon with an extremely low solubility are supersatured in glacial meltwater by more than 1000%. At the continentalslope in front of the large Antarctic caverns ISW mixes with ambient waters toform different precursors of Antarctic Bottom Water. A regional ocean circulation model is presented which uses an explicit formulation of the ocean/ice shelf interaction to describe for the first time the input of noble gases to the Southern Ocean. The results reveal a long-term variability of the basal mass loss solely controlled by the interaction between waters of the continental shelf and the ice shelf cavern. Modeled helium and neon supersaturations from the Filchner-Ronne Ice Shelf front reveal a "low-pass" filtering of the inflowing signal due to cavern processes. On circumpolar scales the helium and neon distributions in the Southern Ocean quantify the ISW contribution to bottom water which spreads with the coastal current connecting the major formation sites in Ross and Weddell Seas. |
format |
Article in Journal/Newspaper |
author |
Rodehacke, Christian Hellmer, Hartmut Huhn, O. Beckmann, A. |
spellingShingle |
Rodehacke, Christian Hellmer, Hartmut Huhn, O. Beckmann, A. Ocean/ice shelf interaction in the southern Weddell Sea: results of a regional numerical helium/neon simulation |
author_facet |
Rodehacke, Christian Hellmer, Hartmut Huhn, O. Beckmann, A. |
author_sort |
Rodehacke, Christian |
title |
Ocean/ice shelf interaction in the southern Weddell Sea: results of a regional numerical helium/neon simulation |
title_short |
Ocean/ice shelf interaction in the southern Weddell Sea: results of a regional numerical helium/neon simulation |
title_full |
Ocean/ice shelf interaction in the southern Weddell Sea: results of a regional numerical helium/neon simulation |
title_fullStr |
Ocean/ice shelf interaction in the southern Weddell Sea: results of a regional numerical helium/neon simulation |
title_full_unstemmed |
Ocean/ice shelf interaction in the southern Weddell Sea: results of a regional numerical helium/neon simulation |
title_sort |
ocean/ice shelf interaction in the southern weddell sea: results of a regional numerical helium/neon simulation |
publishDate |
2006 |
url |
https://epic.awi.de/id/eprint/12810/ https://epic.awi.de/id/eprint/12810/1/Rod2005a.pdf https://doi.org/10.1007/s10236-006-0073-2 https://hdl.handle.net/10013/epic.23220 https://hdl.handle.net/10013/epic.23220.d001 |
long_lat |
ENVELOPE(-61.000,-61.000,-78.500,-78.500) |
geographic |
Antarctic Ronne Ice Shelf Southern Ocean Weddell Weddell Sea |
geographic_facet |
Antarctic Ronne Ice Shelf Southern Ocean Weddell Weddell Sea |
genre |
Antarc* Antarctic Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ice Shelves Ronne Ice Shelf Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ice Shelves Ronne Ice Shelf Southern Ocean Weddell Sea |
op_source |
EPIC3Ocean dynamics, ISBN: 1616-7341 (Paper) 16 |
op_relation |
https://epic.awi.de/id/eprint/12810/1/Rod2005a.pdf https://hdl.handle.net/10013/epic.23220.d001 Rodehacke, C. orcid:0000-0003-3110-3857 , Hellmer, H. orcid:0000-0002-9357-9853 , Huhn, O. and Beckmann, A. (2006) Ocean/ice shelf interaction in the southern Weddell Sea: results of a regional numerical helium/neon simulation , Ocean dynamics . doi:10.1007/s10236-006-0073-2 <https://doi.org/10.1007/s10236-006-0073-2> , hdl:10013/epic.23220 |
op_doi |
https://doi.org/10.1007/s10236-006-0073-2 |
container_title |
Ocean Dynamics |
container_volume |
57 |
container_issue |
1 |
container_start_page |
1 |
op_container_end_page |
11 |
_version_ |
1776197064493891584 |