Numerical modeling of ocean-ice interactions under Pine Island Bay's ice shelf.
A two-dimensional numerical model is used to simulate the dynamics of buoyant, meltwater-rich plumes flowing beneath the ice shelf occupying much of Pine Island Bay, West Antarctica. Recent studies have shown that this ice shelf, along with all others fringing the Amundsen Sea, is thinning rapidly....
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American Geophysical Union
2007
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ftnerc:oai:nora.nerc.ac.uk:5995 2024-06-09T07:38:19+00:00 Numerical modeling of ocean-ice interactions under Pine Island Bay's ice shelf. Payne, Antony J. Holland, Paul R. Shepherd, Andrew P. Rutt, Ian C. Jenkins, Adrian Joughin, Ian 2007 http://nora.nerc.ac.uk/id/eprint/5995/ http://www.agu.org/pubs/crossref/2007/2006JC003733.shtml unknown American Geophysical Union Payne, Antony J.; Holland, Paul R. orcid:0000-0001-8370-289X Shepherd, Andrew P.; Rutt, Ian C.; Jenkins, Adrian orcid:0000-0002-9117-0616 Joughin, Ian. 2007 Numerical modeling of ocean-ice interactions under Pine Island Bay's ice shelf. Journal of Geophysical Research, 112 (C10), C10019. 14, pp. https://doi.org/10.1029/2006JC003733 <https://doi.org/10.1029/2006JC003733> Marine Sciences Glaciology Publication - Article PeerReviewed 2007 ftnerc https://doi.org/10.1029/2006JC003733 2024-05-15T08:52:26Z A two-dimensional numerical model is used to simulate the dynamics of buoyant, meltwater-rich plumes flowing beneath the ice shelf occupying much of Pine Island Bay, West Antarctica. Recent studies have shown that this ice shelf, along with all others fringing the Amundsen Sea, is thinning rapidly. In the model, both the Coriolis effect and subshelf topography are important in controlling plume dynamics and the spatial distribution of ice melt. Melt is concentrated in a narrow zone within ∼20 km of the grounding line where steep subshelf slopes and access to warm ambient water allow melt rates to exceed 100 m yr−1. The plume generated by entrainment of ambient water into the meltwater in these areas is guided by the topography of the ice shelf underside and exits the ice shelf at three distinct outflow locations. Melt rates generated along the course of the plume are higher (approximately 2.5×) than rates elsewhere. The model suggests that the observed ice shelf thinning rates could have resulted from a hypothetical instantaneous 0.25°C warming of the ambient water entrained by the plume. A context for this value is provided by the 40-year warming trend documented by Jacobs et al. (2002) for Circumpolar Deep Water in the nearby Ross Sea. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctica Ice Shelf Pine Island Pine Island Bay Ross Sea West Antarctica Natural Environment Research Council: NERC Open Research Archive Ross Sea West Antarctica Amundsen Sea Island Bay ENVELOPE(-109.085,-109.085,59.534,59.534) Pine Island Bay ENVELOPE(-102.000,-102.000,-74.750,-74.750) Journal of Geophysical Research 112 C10 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Marine Sciences Glaciology |
spellingShingle |
Marine Sciences Glaciology Payne, Antony J. Holland, Paul R. Shepherd, Andrew P. Rutt, Ian C. Jenkins, Adrian Joughin, Ian Numerical modeling of ocean-ice interactions under Pine Island Bay's ice shelf. |
topic_facet |
Marine Sciences Glaciology |
description |
A two-dimensional numerical model is used to simulate the dynamics of buoyant, meltwater-rich plumes flowing beneath the ice shelf occupying much of Pine Island Bay, West Antarctica. Recent studies have shown that this ice shelf, along with all others fringing the Amundsen Sea, is thinning rapidly. In the model, both the Coriolis effect and subshelf topography are important in controlling plume dynamics and the spatial distribution of ice melt. Melt is concentrated in a narrow zone within ∼20 km of the grounding line where steep subshelf slopes and access to warm ambient water allow melt rates to exceed 100 m yr−1. The plume generated by entrainment of ambient water into the meltwater in these areas is guided by the topography of the ice shelf underside and exits the ice shelf at three distinct outflow locations. Melt rates generated along the course of the plume are higher (approximately 2.5×) than rates elsewhere. The model suggests that the observed ice shelf thinning rates could have resulted from a hypothetical instantaneous 0.25°C warming of the ambient water entrained by the plume. A context for this value is provided by the 40-year warming trend documented by Jacobs et al. (2002) for Circumpolar Deep Water in the nearby Ross Sea. |
format |
Article in Journal/Newspaper |
author |
Payne, Antony J. Holland, Paul R. Shepherd, Andrew P. Rutt, Ian C. Jenkins, Adrian Joughin, Ian |
author_facet |
Payne, Antony J. Holland, Paul R. Shepherd, Andrew P. Rutt, Ian C. Jenkins, Adrian Joughin, Ian |
author_sort |
Payne, Antony J. |
title |
Numerical modeling of ocean-ice interactions under Pine Island Bay's ice shelf. |
title_short |
Numerical modeling of ocean-ice interactions under Pine Island Bay's ice shelf. |
title_full |
Numerical modeling of ocean-ice interactions under Pine Island Bay's ice shelf. |
title_fullStr |
Numerical modeling of ocean-ice interactions under Pine Island Bay's ice shelf. |
title_full_unstemmed |
Numerical modeling of ocean-ice interactions under Pine Island Bay's ice shelf. |
title_sort |
numerical modeling of ocean-ice interactions under pine island bay's ice shelf. |
publisher |
American Geophysical Union |
publishDate |
2007 |
url |
http://nora.nerc.ac.uk/id/eprint/5995/ http://www.agu.org/pubs/crossref/2007/2006JC003733.shtml |
long_lat |
ENVELOPE(-109.085,-109.085,59.534,59.534) ENVELOPE(-102.000,-102.000,-74.750,-74.750) |
geographic |
Ross Sea West Antarctica Amundsen Sea Island Bay Pine Island Bay |
geographic_facet |
Ross Sea West Antarctica Amundsen Sea Island Bay Pine Island Bay |
genre |
Amundsen Sea Antarc* Antarctica Ice Shelf Pine Island Pine Island Bay Ross Sea West Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctica Ice Shelf Pine Island Pine Island Bay Ross Sea West Antarctica |
op_relation |
Payne, Antony J.; Holland, Paul R. orcid:0000-0001-8370-289X Shepherd, Andrew P.; Rutt, Ian C.; Jenkins, Adrian orcid:0000-0002-9117-0616 Joughin, Ian. 2007 Numerical modeling of ocean-ice interactions under Pine Island Bay's ice shelf. Journal of Geophysical Research, 112 (C10), C10019. 14, pp. https://doi.org/10.1029/2006JC003733 <https://doi.org/10.1029/2006JC003733> |
op_doi |
https://doi.org/10.1029/2006JC003733 |
container_title |
Journal of Geophysical Research |
container_volume |
112 |
container_issue |
C10 |
_version_ |
1801371511157686272 |