Projections of ice shelf basal melting in a global finite-element sea ice–ice shelf–ocean model
In the framework of EU project Ice2sea, we utilize a finite element sea ice – ice shelf – ocean model (FESOM) to quantify heat and freshwater fluxes in the cavities of the Antarctic ice shelves and obtain projections for ice shelf basal melting in a warmer climate. Ice shelf–ocean interaction is des...
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ftawi:oai:epic.awi.de:26051 2023-05-15T13:24:03+02:00 Projections of ice shelf basal melting in a global finite-element sea ice–ice shelf–ocean model Timmermann, Ralph Hellmer, Hartmut 2012-02-21 https://epic.awi.de/id/eprint/26051/ https://hdl.handle.net/10013/epic.39017 unknown Timmermann, R. and Hellmer, H. orcid:0000-0002-9357-9853 (2012) Projections of ice shelf basal melting in a global finite-element sea ice–ice shelf–ocean model , Ocean Sciences Meeting 2012, Salt Lake City, 19 February 2012 - 24 February 2012 . hdl:10013/epic.39017 EPIC3Ocean Sciences Meeting 2012, Salt Lake City, 2012-02-19-2012-02-24 Conference notRev 2012 ftawi 2021-12-24T15:35:36Z In the framework of EU project Ice2sea, we utilize a finite element sea ice – ice shelf – ocean model (FESOM) to quantify heat and freshwater fluxes in the cavities of the Antarctic ice shelves and obtain projections for ice shelf basal melting in a warmer climate. Ice shelf–ocean interaction is described using a three-equation system with a diagnostic computation of temperature and salinity in the boundary layer between ice and ocean. A tetrahedral mesh with a minimum horizontal resolution of 4 minutes and hybrid vertical coordinates is used. Ice shelf draft, cavity geometry, and global ocean bathymetry have been derived from the RTopo-1 dataset. Simulations for this study were forced with atmospheric data from the Hadley Centre Coupled Model (HadCM3) projections for the IPCC scenarios A1B and E1 until 2199. Results indicate a strong sensitivity to increased ocean temperatures for the ice shelves in Amundsen Sea. Even stronger impact is found for pulses of warm water on the Weddell Sea continental shelf that may increase basal melting of Filcher-Ronne Ice Shelf by a factor of five. Conference Object Amundsen Sea Antarc* Antarctic Ice Shelf Ice Shelves Ronne Ice Shelf Sea ice Weddell Sea Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic The Antarctic Weddell Sea Amundsen Sea Weddell Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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description |
In the framework of EU project Ice2sea, we utilize a finite element sea ice – ice shelf – ocean model (FESOM) to quantify heat and freshwater fluxes in the cavities of the Antarctic ice shelves and obtain projections for ice shelf basal melting in a warmer climate. Ice shelf–ocean interaction is described using a three-equation system with a diagnostic computation of temperature and salinity in the boundary layer between ice and ocean. A tetrahedral mesh with a minimum horizontal resolution of 4 minutes and hybrid vertical coordinates is used. Ice shelf draft, cavity geometry, and global ocean bathymetry have been derived from the RTopo-1 dataset. Simulations for this study were forced with atmospheric data from the Hadley Centre Coupled Model (HadCM3) projections for the IPCC scenarios A1B and E1 until 2199. Results indicate a strong sensitivity to increased ocean temperatures for the ice shelves in Amundsen Sea. Even stronger impact is found for pulses of warm water on the Weddell Sea continental shelf that may increase basal melting of Filcher-Ronne Ice Shelf by a factor of five. |
format |
Conference Object |
author |
Timmermann, Ralph Hellmer, Hartmut |
spellingShingle |
Timmermann, Ralph Hellmer, Hartmut Projections of ice shelf basal melting in a global finite-element sea ice–ice shelf–ocean model |
author_facet |
Timmermann, Ralph Hellmer, Hartmut |
author_sort |
Timmermann, Ralph |
title |
Projections of ice shelf basal melting in a global finite-element sea ice–ice shelf–ocean model |
title_short |
Projections of ice shelf basal melting in a global finite-element sea ice–ice shelf–ocean model |
title_full |
Projections of ice shelf basal melting in a global finite-element sea ice–ice shelf–ocean model |
title_fullStr |
Projections of ice shelf basal melting in a global finite-element sea ice–ice shelf–ocean model |
title_full_unstemmed |
Projections of ice shelf basal melting in a global finite-element sea ice–ice shelf–ocean model |
title_sort |
projections of ice shelf basal melting in a global finite-element sea ice–ice shelf–ocean model |
publishDate |
2012 |
url |
https://epic.awi.de/id/eprint/26051/ https://hdl.handle.net/10013/epic.39017 |
long_lat |
ENVELOPE(-61.000,-61.000,-78.500,-78.500) |
geographic |
Antarctic The Antarctic Weddell Sea Amundsen Sea Weddell Ronne Ice Shelf |
geographic_facet |
Antarctic The Antarctic Weddell Sea Amundsen Sea Weddell Ronne Ice Shelf |
genre |
Amundsen Sea Antarc* Antarctic Ice Shelf Ice Shelves Ronne Ice Shelf Sea ice Weddell Sea |
genre_facet |
Amundsen Sea Antarc* Antarctic Ice Shelf Ice Shelves Ronne Ice Shelf Sea ice Weddell Sea |
op_source |
EPIC3Ocean Sciences Meeting 2012, Salt Lake City, 2012-02-19-2012-02-24 |
op_relation |
Timmermann, R. and Hellmer, H. orcid:0000-0002-9357-9853 (2012) Projections of ice shelf basal melting in a global finite-element sea ice–ice shelf–ocean model , Ocean Sciences Meeting 2012, Salt Lake City, 19 February 2012 - 24 February 2012 . hdl:10013/epic.39017 |
_version_ |
1766377172725923840 |