Ocean mixing beneath Pine Island Glacier ice shelf, West Antarctica
Ice shelves around Antarctica are vulnerable to an increase in ocean-driven melting, with the melt rate depending on ocean temperature and the strength of flow inside the ice-shelf cavities. We present measurements of velocity, temperature, salinity, turbulent kinetic energy dissipation rate, and th...
Published in: | Journal of Geophysical Research: Oceans |
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American Geophysical Union
2016
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ftunivnorthumb:oai:nrl.northumbria.ac.uk:42661 2023-05-15T13:44:52+02:00 Ocean mixing beneath Pine Island Glacier ice shelf, West Antarctica Kimura, Satoshi Jenkins, Adrian Dutrieux, Pierre Forryan, Alexander Naveira Garabato, Alberto C. Firing, Yvonne 2016-12-01 text https://nrl.northumbria.ac.uk/id/eprint/42661/ https://doi.org/10.1002/2016JC012149 https://nrl.northumbria.ac.uk/id/eprint/42661/1/Ocean%20mixing%20beneath%20Pine%20Island%20Glacier%20ice%20shelf,%20West%20Antarctica.pdf en eng American Geophysical Union https://nrl.northumbria.ac.uk/id/eprint/42661/1/Ocean%20mixing%20beneath%20Pine%20Island%20Glacier%20ice%20shelf,%20West%20Antarctica.pdf Kimura, Satoshi, Jenkins, Adrian, Dutrieux, Pierre, Forryan, Alexander, Naveira Garabato, Alberto C. and Firing, Yvonne (2016) Ocean mixing beneath Pine Island Glacier ice shelf, West Antarctica. Journal of Geophysical Research: Oceans, 121 (12). pp. 8496-8510. ISSN 2169-9275 F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences Article PeerReviewed 2016 ftunivnorthumb https://doi.org/10.1002/2016JC012149 2022-09-25T06:11:45Z Ice shelves around Antarctica are vulnerable to an increase in ocean-driven melting, with the melt rate depending on ocean temperature and the strength of flow inside the ice-shelf cavities. We present measurements of velocity, temperature, salinity, turbulent kinetic energy dissipation rate, and thermal variance dissipation rate beneath Pine Island Glacier ice shelf, West Antarctica. These measurements were obtained by CTD, ADCP, and turbulence sensors mounted on an Autonomous Underwater Vehicle (AUV). The highest turbulent kinetic energy dissipation rate is found near the grounding line. The thermal variance dissipation rate increases closer to the ice-shelf base, with a maximum value found ∼0.5 m away from the ice. The measurements of turbulent kinetic energy dissipation rate near the ice are used to estimate basal melting of the ice shelf. The dissipation-rate-based melt rate estimates is sensitive to the stability correction parameter in the linear approximation of universal function of the Monin-Obukhov similarity theory for stratified boundary layers. We argue that our estimates of basal melting from dissipation rates are within a range of previous estimates of basal melting. Article in Journal/Newspaper Antarc* Antarctica Antarctica Journal Ice Shelf Ice Shelves Pine Island Pine Island Glacier West Antarctica Northumbria University, Newcastle: Northumbria Research Link (NRL) Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) West Antarctica Journal of Geophysical Research: Oceans 121 12 8496 8510 |
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 Kimura, Satoshi Jenkins, Adrian Dutrieux, Pierre Forryan, Alexander Naveira Garabato, Alberto C. Firing, Yvonne Ocean mixing beneath Pine Island Glacier ice shelf, West Antarctica |
topic_facet |
F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences |
description |
Ice shelves around Antarctica are vulnerable to an increase in ocean-driven melting, with the melt rate depending on ocean temperature and the strength of flow inside the ice-shelf cavities. We present measurements of velocity, temperature, salinity, turbulent kinetic energy dissipation rate, and thermal variance dissipation rate beneath Pine Island Glacier ice shelf, West Antarctica. These measurements were obtained by CTD, ADCP, and turbulence sensors mounted on an Autonomous Underwater Vehicle (AUV). The highest turbulent kinetic energy dissipation rate is found near the grounding line. The thermal variance dissipation rate increases closer to the ice-shelf base, with a maximum value found ∼0.5 m away from the ice. The measurements of turbulent kinetic energy dissipation rate near the ice are used to estimate basal melting of the ice shelf. The dissipation-rate-based melt rate estimates is sensitive to the stability correction parameter in the linear approximation of universal function of the Monin-Obukhov similarity theory for stratified boundary layers. We argue that our estimates of basal melting from dissipation rates are within a range of previous estimates of basal melting. |
format |
Article in Journal/Newspaper |
author |
Kimura, Satoshi Jenkins, Adrian Dutrieux, Pierre Forryan, Alexander Naveira Garabato, Alberto C. Firing, Yvonne |
author_facet |
Kimura, Satoshi Jenkins, Adrian Dutrieux, Pierre Forryan, Alexander Naveira Garabato, Alberto C. Firing, Yvonne |
author_sort |
Kimura, Satoshi |
title |
Ocean mixing beneath Pine Island Glacier ice shelf, West Antarctica |
title_short |
Ocean mixing beneath Pine Island Glacier ice shelf, West Antarctica |
title_full |
Ocean mixing beneath Pine Island Glacier ice shelf, West Antarctica |
title_fullStr |
Ocean mixing beneath Pine Island Glacier ice shelf, West Antarctica |
title_full_unstemmed |
Ocean mixing beneath Pine Island Glacier ice shelf, West Antarctica |
title_sort |
ocean mixing beneath pine island glacier ice shelf, west antarctica |
publisher |
American Geophysical Union |
publishDate |
2016 |
url |
https://nrl.northumbria.ac.uk/id/eprint/42661/ https://doi.org/10.1002/2016JC012149 https://nrl.northumbria.ac.uk/id/eprint/42661/1/Ocean%20mixing%20beneath%20Pine%20Island%20Glacier%20ice%20shelf,%20West%20Antarctica.pdf |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
Pine Island Glacier West Antarctica |
geographic_facet |
Pine Island Glacier West Antarctica |
genre |
Antarc* Antarctica Antarctica Journal Ice Shelf Ice Shelves Pine Island Pine Island Glacier West Antarctica |
genre_facet |
Antarc* Antarctica Antarctica Journal Ice Shelf Ice Shelves Pine Island Pine Island Glacier West Antarctica |
op_relation |
https://nrl.northumbria.ac.uk/id/eprint/42661/1/Ocean%20mixing%20beneath%20Pine%20Island%20Glacier%20ice%20shelf,%20West%20Antarctica.pdf Kimura, Satoshi, Jenkins, Adrian, Dutrieux, Pierre, Forryan, Alexander, Naveira Garabato, Alberto C. and Firing, Yvonne (2016) Ocean mixing beneath Pine Island Glacier ice shelf, West Antarctica. Journal of Geophysical Research: Oceans, 121 (12). pp. 8496-8510. ISSN 2169-9275 |
op_doi |
https://doi.org/10.1002/2016JC012149 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
121 |
container_issue |
12 |
container_start_page |
8496 |
op_container_end_page |
8510 |
_version_ |
1766207802901004288 |