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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Online Access: | https://nrl.northumbria.ac.uk/id/eprint/42258/ https://doi.org/10.1029/2006JC003733 https://nrl.northumbria.ac.uk/id/eprint/42258/1/Numerical%20modeling%20of%20ocean-ice%20interactions%20under%20Pine%20Island%20Bay%E2%80%99sice%20shelf.pdf |
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ftunivnorthumb:oai:nrl.northumbria.ac.uk:42258 2023-05-15T13:24:06+02:00 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 2007-10-19 text https://nrl.northumbria.ac.uk/id/eprint/42258/ https://doi.org/10.1029/2006JC003733 https://nrl.northumbria.ac.uk/id/eprint/42258/1/Numerical%20modeling%20of%20ocean-ice%20interactions%20under%20Pine%20Island%20Bay%E2%80%99sice%20shelf.pdf en eng American Geophysical Union https://nrl.northumbria.ac.uk/id/eprint/42258/1/Numerical%20modeling%20of%20ocean-ice%20interactions%20under%20Pine%20Island%20Bay%E2%80%99sice%20shelf.pdf Payne, Antony J., Holland, Paul R., Shepherd, Andrew P., Rutt, Ian C., Jenkins, Adrian and Joughin, Ian (2007) Numerical modeling of ocean-ice interactions under Pine Island Bay's ice shelf. Journal of Geophysical Research, 112 (C10). C10019. ISSN 0148-0227 F700 Ocean Sciences Article PeerReviewed 2007 ftunivnorthumb https://doi.org/10.1029/2006JC003733 2022-09-25T06:11:31Z 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 in 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 2.5x) 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 Northumbria University, Newcastle: Northumbria Research Link (NRL) 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) Ross Sea West Antarctica Journal of Geophysical Research 112 C10 |
institution |
Open Polar |
collection |
Northumbria University, Newcastle: Northumbria Research Link (NRL) |
op_collection_id |
ftunivnorthumb |
language |
English |
topic |
F700 Ocean Sciences |
spellingShingle |
F700 Ocean Sciences 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 |
F700 Ocean Sciences |
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 in 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 2.5x) 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 |
https://nrl.northumbria.ac.uk/id/eprint/42258/ https://doi.org/10.1029/2006JC003733 https://nrl.northumbria.ac.uk/id/eprint/42258/1/Numerical%20modeling%20of%20ocean-ice%20interactions%20under%20Pine%20Island%20Bay%E2%80%99sice%20shelf.pdf |
long_lat |
ENVELOPE(-109.085,-109.085,59.534,59.534) ENVELOPE(-102.000,-102.000,-74.750,-74.750) |
geographic |
Amundsen Sea Island Bay Pine Island Bay Ross Sea West Antarctica |
geographic_facet |
Amundsen Sea Island Bay Pine Island Bay Ross Sea West Antarctica |
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 |
https://nrl.northumbria.ac.uk/id/eprint/42258/1/Numerical%20modeling%20of%20ocean-ice%20interactions%20under%20Pine%20Island%20Bay%E2%80%99sice%20shelf.pdf Payne, Antony J., Holland, Paul R., Shepherd, Andrew P., Rutt, Ian C., Jenkins, Adrian and Joughin, Ian (2007) Numerical modeling of ocean-ice interactions under Pine Island Bay's ice shelf. Journal of Geophysical Research, 112 (C10). C10019. ISSN 0148-0227 |
op_doi |
https://doi.org/10.1029/2006JC003733 |
container_title |
Journal of Geophysical Research |
container_volume |
112 |
container_issue |
C10 |
_version_ |
1766377402328416256 |