Response to Filchner-Ronne Ice Shelf cavity warming in a coupled ocean-ice sheet model - Part 1: The ocean perspective
The Regional Antarctic ice and Global Ocean (RAnGO) model has been developed to study the interaction between the world ocean and the Antarctic ice sheet. The coupled model is based on a global implementation of the Finite Element Sea-ice Ocean Model (FESOM) with a mesh refinement in the Southern Oc...
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ftawi:oai:epic.awi.de:45570 2023-05-15T13:45:21+02:00 Response to Filchner-Ronne Ice Shelf cavity warming in a coupled ocean-ice sheet model - Part 1: The ocean perspective Timmermann, Ralph Goeller, Sebastian 2017-09-21 application/pdf https://epic.awi.de/id/eprint/45570/ https://epic.awi.de/id/eprint/45570/1/rangopap4epic.pdf https://hdl.handle.net/10013/epic.51678 https://hdl.handle.net/10013/epic.51678.d001 unknown COPERNICUS GESELLSCHAFT MBH https://epic.awi.de/id/eprint/45570/1/rangopap4epic.pdf https://hdl.handle.net/10013/epic.51678.d001 Timmermann, R. and Goeller, S. (2017) Response to Filchner-Ronne Ice Shelf cavity warming in a coupled ocean-ice sheet model - Part 1: The ocean perspective , Ocean Science, 13 , pp. 765-776 . doi:10.5194/os-13-765-2017 <https://doi.org/10.5194/os-13-765-2017> , hdl:10013/epic.51678 EPIC3Ocean Science, COPERNICUS GESELLSCHAFT MBH, 13, pp. 765-776, ISSN: 1812-0784 Article isiRev 2017 ftawi https://doi.org/10.5194/os-13-765-2017 2021-12-24T15:43:17Z The Regional Antarctic ice and Global Ocean (RAnGO) model has been developed to study the interaction between the world ocean and the Antarctic ice sheet. The coupled model is based on a global implementation of the Finite Element Sea-ice Ocean Model (FESOM) with a mesh refinement in the Southern Ocean, particularly in its marginal seas and in the sub-ice shelf cavities. The cryosphere is represented by a regional setup of the ice flow model RIMBAY comprising the Filchner-Ronne Ice Shelf and the grounded ice in its catchment area up to the ice divides. At the base of the RIMBAY ice shelf, melt rates from FESOM's ice-shelf component are supplied. RIMBAY returns ice thickness and the position of the grounding line. The ocean model uses a pre-computed mesh to allow for an easy adjustment of the model domain to a varying cavity geometry. RAnGO simulations with a 20th-century climate forcing yield realistic basal melt rates and a quasi-stable grounding line position close to the presently observed state. In a centennial-scale warm-water-inflow scenario, the model suggests a substantial thinning of the ice shelf and a local retreat of the grounding line. The potentially negative feedback from ice-shelf thinning through a rising in-situ freezing temperature is more than outweighed by the increasing water column thickness in the deepest parts of the cavity. Compared to a control simulation with fixed ice-shelf geometry, the coupled model thus yields a slightly stronger increase of ice-shelf basal melt rates. Article in Journal/Newspaper Antarc* Antarctic Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Sheet Ice Shelf Ronne Ice Shelf Sea ice Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Southern Ocean The Antarctic Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) Ocean Science 13 5 765 776 |
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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 |
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description |
The Regional Antarctic ice and Global Ocean (RAnGO) model has been developed to study the interaction between the world ocean and the Antarctic ice sheet. The coupled model is based on a global implementation of the Finite Element Sea-ice Ocean Model (FESOM) with a mesh refinement in the Southern Ocean, particularly in its marginal seas and in the sub-ice shelf cavities. The cryosphere is represented by a regional setup of the ice flow model RIMBAY comprising the Filchner-Ronne Ice Shelf and the grounded ice in its catchment area up to the ice divides. At the base of the RIMBAY ice shelf, melt rates from FESOM's ice-shelf component are supplied. RIMBAY returns ice thickness and the position of the grounding line. The ocean model uses a pre-computed mesh to allow for an easy adjustment of the model domain to a varying cavity geometry. RAnGO simulations with a 20th-century climate forcing yield realistic basal melt rates and a quasi-stable grounding line position close to the presently observed state. In a centennial-scale warm-water-inflow scenario, the model suggests a substantial thinning of the ice shelf and a local retreat of the grounding line. The potentially negative feedback from ice-shelf thinning through a rising in-situ freezing temperature is more than outweighed by the increasing water column thickness in the deepest parts of the cavity. Compared to a control simulation with fixed ice-shelf geometry, the coupled model thus yields a slightly stronger increase of ice-shelf basal melt rates. |
format |
Article in Journal/Newspaper |
author |
Timmermann, Ralph Goeller, Sebastian |
spellingShingle |
Timmermann, Ralph Goeller, Sebastian Response to Filchner-Ronne Ice Shelf cavity warming in a coupled ocean-ice sheet model - Part 1: The ocean perspective |
author_facet |
Timmermann, Ralph Goeller, Sebastian |
author_sort |
Timmermann, Ralph |
title |
Response to Filchner-Ronne Ice Shelf cavity warming in a coupled ocean-ice sheet model - Part 1: The ocean perspective |
title_short |
Response to Filchner-Ronne Ice Shelf cavity warming in a coupled ocean-ice sheet model - Part 1: The ocean perspective |
title_full |
Response to Filchner-Ronne Ice Shelf cavity warming in a coupled ocean-ice sheet model - Part 1: The ocean perspective |
title_fullStr |
Response to Filchner-Ronne Ice Shelf cavity warming in a coupled ocean-ice sheet model - Part 1: The ocean perspective |
title_full_unstemmed |
Response to Filchner-Ronne Ice Shelf cavity warming in a coupled ocean-ice sheet model - Part 1: The ocean perspective |
title_sort |
response to filchner-ronne ice shelf cavity warming in a coupled ocean-ice sheet model - part 1: the ocean perspective |
publisher |
COPERNICUS GESELLSCHAFT MBH |
publishDate |
2017 |
url |
https://epic.awi.de/id/eprint/45570/ https://epic.awi.de/id/eprint/45570/1/rangopap4epic.pdf https://hdl.handle.net/10013/epic.51678 https://hdl.handle.net/10013/epic.51678.d001 |
long_lat |
ENVELOPE(-61.000,-61.000,-78.500,-78.500) |
geographic |
Antarctic Southern Ocean The Antarctic Ronne Ice Shelf |
geographic_facet |
Antarctic Southern Ocean The Antarctic Ronne Ice Shelf |
genre |
Antarc* Antarctic Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Sheet Ice Shelf Ronne Ice Shelf Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Sheet Ice Shelf Ronne Ice Shelf Sea ice Southern Ocean |
op_source |
EPIC3Ocean Science, COPERNICUS GESELLSCHAFT MBH, 13, pp. 765-776, ISSN: 1812-0784 |
op_relation |
https://epic.awi.de/id/eprint/45570/1/rangopap4epic.pdf https://hdl.handle.net/10013/epic.51678.d001 Timmermann, R. and Goeller, S. (2017) Response to Filchner-Ronne Ice Shelf cavity warming in a coupled ocean-ice sheet model - Part 1: The ocean perspective , Ocean Science, 13 , pp. 765-776 . doi:10.5194/os-13-765-2017 <https://doi.org/10.5194/os-13-765-2017> , hdl:10013/epic.51678 |
op_doi |
https://doi.org/10.5194/os-13-765-2017 |
container_title |
Ocean Science |
container_volume |
13 |
container_issue |
5 |
container_start_page |
765 |
op_container_end_page |
776 |
_version_ |
1766220975318237184 |