Ocean-Forced Ice-Shelf Thinning in a Synchronously Coupled Ice-Ocean Model
The first fully synchronous, coupled ice shelf-ocean model with a fixed grounding line and imposed upstream ice velocity has been developed using the MITgcm (Massachusetts Institute of Technology general circulation model). Unlike previous, asynchronous, approaches to coupled modeling our approach i...
Published in: | Journal of Geophysical Research: Oceans |
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Format: | Article in Journal/Newspaper |
Language: | English |
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American Geophysical Union
2018
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Online Access: | https://nrl.northumbria.ac.uk/id/eprint/33708/ https://doi.org/10.1002/2017JC013251 https://nrl.northumbria.ac.uk/id/eprint/33708/8/2017JC013251.pdf https://nrl.northumbria.ac.uk/id/eprint/33708/1/Ocean-forced%20ice-shelf%20thinning%20in%20a%20synchronously%20coupled%20ice--ocean%20model_V6.pdf |
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ftunivnorthumb:oai:nrl.northumbria.ac.uk:33708 2023-05-15T16:41:43+02:00 Ocean-Forced Ice-Shelf Thinning in a Synchronously Coupled Ice-Ocean Model Jordan, Jim Holland, Paul Goldberg, Dan Snow, Kate Arthern, Robert Campin, Jean-Michel Heimbach, Patrick Jenkins, Adrian 2018-02-01 text https://nrl.northumbria.ac.uk/id/eprint/33708/ https://doi.org/10.1002/2017JC013251 https://nrl.northumbria.ac.uk/id/eprint/33708/8/2017JC013251.pdf https://nrl.northumbria.ac.uk/id/eprint/33708/1/Ocean-forced%20ice-shelf%20thinning%20in%20a%20synchronously%20coupled%20ice--ocean%20model_V6.pdf en eng American Geophysical Union https://nrl.northumbria.ac.uk/id/eprint/33708/8/2017JC013251.pdf https://nrl.northumbria.ac.uk/id/eprint/33708/1/Ocean-forced%20ice-shelf%20thinning%20in%20a%20synchronously%20coupled%20ice--ocean%20model_V6.pdf Jordan, Jim, Holland, Paul, Goldberg, Dan, Snow, Kate, Arthern, Robert, Campin, Jean-Michel, Heimbach, Patrick and Jenkins, Adrian (2018) Ocean-Forced Ice-Shelf Thinning in a Synchronously Coupled Ice-Ocean Model. Journal of Geophysical Research: Oceans, 123 (2). pp. 864-882. ISSN 2169-9275 F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences Article PeerReviewed 2018 ftunivnorthumb https://doi.org/10.1002/2017JC013251 2022-09-25T06:06:57Z The first fully synchronous, coupled ice shelf-ocean model with a fixed grounding line and imposed upstream ice velocity has been developed using the MITgcm (Massachusetts Institute of Technology general circulation model). Unlike previous, asynchronous, approaches to coupled modeling our approach is fully conservative of heat, salt, and mass. Synchronous coupling is achieved by continuously updating the ice-shelf thickness on the ocean time step. By simulating an idealized, warm-water ice shelf we show how raising the pycnocline leads to a reduction in both ice-shelf mass and back stress, and hence buttressing. Coupled runs show the formation of a western boundary channel in the ice-shelf base due to increased melting on the western boundary due to Coriolis enhanced flow. Eastern boundary ice thickening is also observed. This is not the case when using a simple depth-dependent parameterized melt, as the ice shelf has relatively thinner sides and a thicker central “bulge” for a given ice-shelf mass. Ice-shelf geometry arising from the parameterized melt rate tends to underestimate backstress (and therefore buttressing) for a given ice-shelf mass due to a thinner ice shelf at the boundaries when compared to coupled model simulations. Article in Journal/Newspaper Ice Shelf Northumbria University, Newcastle: Northumbria Research Link (NRL) Journal of Geophysical Research: Oceans 123 2 864 882 |
institution |
Open Polar |
collection |
Northumbria University, Newcastle: Northumbria Research Link (NRL) |
op_collection_id |
ftunivnorthumb |
language |
English |
topic |
F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences |
spellingShingle |
F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences Jordan, Jim Holland, Paul Goldberg, Dan Snow, Kate Arthern, Robert Campin, Jean-Michel Heimbach, Patrick Jenkins, Adrian Ocean-Forced Ice-Shelf Thinning in a Synchronously Coupled Ice-Ocean Model |
topic_facet |
F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences |
description |
The first fully synchronous, coupled ice shelf-ocean model with a fixed grounding line and imposed upstream ice velocity has been developed using the MITgcm (Massachusetts Institute of Technology general circulation model). Unlike previous, asynchronous, approaches to coupled modeling our approach is fully conservative of heat, salt, and mass. Synchronous coupling is achieved by continuously updating the ice-shelf thickness on the ocean time step. By simulating an idealized, warm-water ice shelf we show how raising the pycnocline leads to a reduction in both ice-shelf mass and back stress, and hence buttressing. Coupled runs show the formation of a western boundary channel in the ice-shelf base due to increased melting on the western boundary due to Coriolis enhanced flow. Eastern boundary ice thickening is also observed. This is not the case when using a simple depth-dependent parameterized melt, as the ice shelf has relatively thinner sides and a thicker central “bulge” for a given ice-shelf mass. Ice-shelf geometry arising from the parameterized melt rate tends to underestimate backstress (and therefore buttressing) for a given ice-shelf mass due to a thinner ice shelf at the boundaries when compared to coupled model simulations. |
format |
Article in Journal/Newspaper |
author |
Jordan, Jim Holland, Paul Goldberg, Dan Snow, Kate Arthern, Robert Campin, Jean-Michel Heimbach, Patrick Jenkins, Adrian |
author_facet |
Jordan, Jim Holland, Paul Goldberg, Dan Snow, Kate Arthern, Robert Campin, Jean-Michel Heimbach, Patrick Jenkins, Adrian |
author_sort |
Jordan, Jim |
title |
Ocean-Forced Ice-Shelf Thinning in a Synchronously Coupled Ice-Ocean Model |
title_short |
Ocean-Forced Ice-Shelf Thinning in a Synchronously Coupled Ice-Ocean Model |
title_full |
Ocean-Forced Ice-Shelf Thinning in a Synchronously Coupled Ice-Ocean Model |
title_fullStr |
Ocean-Forced Ice-Shelf Thinning in a Synchronously Coupled Ice-Ocean Model |
title_full_unstemmed |
Ocean-Forced Ice-Shelf Thinning in a Synchronously Coupled Ice-Ocean Model |
title_sort |
ocean-forced ice-shelf thinning in a synchronously coupled ice-ocean model |
publisher |
American Geophysical Union |
publishDate |
2018 |
url |
https://nrl.northumbria.ac.uk/id/eprint/33708/ https://doi.org/10.1002/2017JC013251 https://nrl.northumbria.ac.uk/id/eprint/33708/8/2017JC013251.pdf https://nrl.northumbria.ac.uk/id/eprint/33708/1/Ocean-forced%20ice-shelf%20thinning%20in%20a%20synchronously%20coupled%20ice--ocean%20model_V6.pdf |
genre |
Ice Shelf |
genre_facet |
Ice Shelf |
op_relation |
https://nrl.northumbria.ac.uk/id/eprint/33708/8/2017JC013251.pdf https://nrl.northumbria.ac.uk/id/eprint/33708/1/Ocean-forced%20ice-shelf%20thinning%20in%20a%20synchronously%20coupled%20ice--ocean%20model_V6.pdf Jordan, Jim, Holland, Paul, Goldberg, Dan, Snow, Kate, Arthern, Robert, Campin, Jean-Michel, Heimbach, Patrick and Jenkins, Adrian (2018) Ocean-Forced Ice-Shelf Thinning in a Synchronously Coupled Ice-Ocean Model. Journal of Geophysical Research: Oceans, 123 (2). pp. 864-882. ISSN 2169-9275 |
op_doi |
https://doi.org/10.1002/2017JC013251 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
123 |
container_issue |
2 |
container_start_page |
864 |
op_container_end_page |
882 |
_version_ |
1766032177723604992 |