Ice Shelf-Ocean Interactions Near Ice Rises and Ice Rumples
The stability of ice shelves depends on the existence of embayments and is largely influenced by ice rises and ice rumples, which act as “pinning-points” for ice shelf movement. Of additional critical importance are interactions between ice shelves and the water masses underlying them in ice shelf c...
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ftawi:oai:epic.awi.de:42739 2024-09-15T17:41:09+00:00 Ice Shelf-Ocean Interactions Near Ice Rises and Ice Rumples Lange, M. A. Rueckamp, Martin Kleiner, Thomas 2013 https://epic.awi.de/id/eprint/42739/ http://abstractsearch.agu.org/meetings/2013/FM/C53B-0574.html https://hdl.handle.net/10013/epic.49347 unknown Lange, M. A. , Rueckamp, M. orcid:0000-0003-2512-7238 and Kleiner, T. orcid:0000-0001-7825-5765 (2013) Ice Shelf-Ocean Interactions Near Ice Rises and Ice Rumples , AGU Fall Meeting, San Francisco, 9 December 2013 - 13 December 2013 . hdl:10013/epic.49347 EPIC3AGU Fall Meeting, San Francisco, 2013-12-09-2013-12-13 Conference notRev 2013 ftawi 2024-06-24T04:16:35Z The stability of ice shelves depends on the existence of embayments and is largely influenced by ice rises and ice rumples, which act as “pinning-points” for ice shelf movement. Of additional critical importance are interactions between ice shelves and the water masses underlying them in ice shelf cavities, particularly melting and refreezing processes. The present study aims to elucidate the role of ice rises and ice rumples in the context of climate change impacts on Antarctic ice shelves. However, due to their smaller spatial extent, ice rumples react more sensitively to climate change than ice rises. Different forcings are at work and need to be considered separately as well as synergistically. In order to address these issues, we have decided to deal with the following three issues explicitly: oceanographic-, cryospheric and general topics. In so doing, we paid particular attention to possible interrelationships and feedbacks in a coupled ice-shelf-ocean system. With regard to oceanographic issues, we have applied the ocean circulation model ROMBAX to ocean water masses adjacent to and underneath a number of idealized ice shelf configurations: wide and narrow as well as laterally restrained and unrestrained ice shelves. Simulations were performed with and without small ice rises located close to the calving front. For larger configurations, the impact of the ice rises on melt rates at the ice shelf base is negligible, while for smaller configurations net melting rates at the ice-shelf base differ by a factor of up to eight depending on whether ice rises are considered or not. We employed the thermo-coupled ice flow model TIM-FD3 to simulate the effects of several ice rises and one ice rumple on the dynamics of ice shelf flow. We considered the complete un-grounding of the ice shelf in order to investigate the effect of pinning points of different characteristics (interior or near calving front, small and medium sized) on the resulting flow and stress fields, focusing on the floating ice parts of the Brunt ... Conference Object Antarc* Antarctic Ice Shelf Ice Shelves Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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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 stability of ice shelves depends on the existence of embayments and is largely influenced by ice rises and ice rumples, which act as “pinning-points” for ice shelf movement. Of additional critical importance are interactions between ice shelves and the water masses underlying them in ice shelf cavities, particularly melting and refreezing processes. The present study aims to elucidate the role of ice rises and ice rumples in the context of climate change impacts on Antarctic ice shelves. However, due to their smaller spatial extent, ice rumples react more sensitively to climate change than ice rises. Different forcings are at work and need to be considered separately as well as synergistically. In order to address these issues, we have decided to deal with the following three issues explicitly: oceanographic-, cryospheric and general topics. In so doing, we paid particular attention to possible interrelationships and feedbacks in a coupled ice-shelf-ocean system. With regard to oceanographic issues, we have applied the ocean circulation model ROMBAX to ocean water masses adjacent to and underneath a number of idealized ice shelf configurations: wide and narrow as well as laterally restrained and unrestrained ice shelves. Simulations were performed with and without small ice rises located close to the calving front. For larger configurations, the impact of the ice rises on melt rates at the ice shelf base is negligible, while for smaller configurations net melting rates at the ice-shelf base differ by a factor of up to eight depending on whether ice rises are considered or not. We employed the thermo-coupled ice flow model TIM-FD3 to simulate the effects of several ice rises and one ice rumple on the dynamics of ice shelf flow. We considered the complete un-grounding of the ice shelf in order to investigate the effect of pinning points of different characteristics (interior or near calving front, small and medium sized) on the resulting flow and stress fields, focusing on the floating ice parts of the Brunt ... |
format |
Conference Object |
author |
Lange, M. A. Rueckamp, Martin Kleiner, Thomas |
spellingShingle |
Lange, M. A. Rueckamp, Martin Kleiner, Thomas Ice Shelf-Ocean Interactions Near Ice Rises and Ice Rumples |
author_facet |
Lange, M. A. Rueckamp, Martin Kleiner, Thomas |
author_sort |
Lange, M. A. |
title |
Ice Shelf-Ocean Interactions Near Ice Rises and Ice Rumples |
title_short |
Ice Shelf-Ocean Interactions Near Ice Rises and Ice Rumples |
title_full |
Ice Shelf-Ocean Interactions Near Ice Rises and Ice Rumples |
title_fullStr |
Ice Shelf-Ocean Interactions Near Ice Rises and Ice Rumples |
title_full_unstemmed |
Ice Shelf-Ocean Interactions Near Ice Rises and Ice Rumples |
title_sort |
ice shelf-ocean interactions near ice rises and ice rumples |
publishDate |
2013 |
url |
https://epic.awi.de/id/eprint/42739/ http://abstractsearch.agu.org/meetings/2013/FM/C53B-0574.html https://hdl.handle.net/10013/epic.49347 |
genre |
Antarc* Antarctic Ice Shelf Ice Shelves |
genre_facet |
Antarc* Antarctic Ice Shelf Ice Shelves |
op_source |
EPIC3AGU Fall Meeting, San Francisco, 2013-12-09-2013-12-13 |
op_relation |
Lange, M. A. , Rueckamp, M. orcid:0000-0003-2512-7238 and Kleiner, T. orcid:0000-0001-7825-5765 (2013) Ice Shelf-Ocean Interactions Near Ice Rises and Ice Rumples , AGU Fall Meeting, San Francisco, 9 December 2013 - 13 December 2013 . hdl:10013/epic.49347 |
_version_ |
1810487273407381504 |