Reviewing the circulation and mixing of Antarctic Intermediate Water in the South Pacific using evidence from geochemical tracers and Argo float trajectories
Evidence from physical and geochemical tracers measured during the World Ocean Circulation Experiment (WOCE) shows that there are four sub-types of Antarctic Intermediate Water (AAIW) in the South Pacific. The main formation region of AAIW is the southeast Pacific, where fresh, cold, high oxygen, lo...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
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Online Access: | http://hdl.handle.net/1885/71053 https://doi.org/10.1016/j.dsr.2012.11.007 https://openresearch-repository.anu.edu.au/bitstream/1885/71053/5/f5625xPUB2533_2013.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/71053/7/01_Bostock_Reviewing_the_circulation_and_2013.pdf.jpg |
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/71053 2024-01-14T10:02:26+01:00 Reviewing the circulation and mixing of Antarctic Intermediate Water in the South Pacific using evidence from geochemical tracers and Argo float trajectories Bostock, Helen C. Sutton, Phillip Williams, Michael J.M. Opdyke, Bradley http://hdl.handle.net/1885/71053 https://doi.org/10.1016/j.dsr.2012.11.007 https://openresearch-repository.anu.edu.au/bitstream/1885/71053/5/f5625xPUB2533_2013.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/71053/7/01_Bostock_Reviewing_the_circulation_and_2013.pdf.jpg unknown Elsevier 0967-0637 http://hdl.handle.net/1885/71053 doi:10.1016/j.dsr.2012.11.007 https://openresearch-repository.anu.edu.au/bitstream/1885/71053/5/f5625xPUB2533_2013.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/71053/7/01_Bostock_Reviewing_the_circulation_and_2013.pdf.jpg Deep-Sea Research Part 1. Oceanographic Research Papers Keywords: Antarctic circumpolar current Antarctic intermediate waters Argo Argo float Chatham rise Circulation patterns East Pacific Rise Equatorial Pacific Geochemical tracer High oxygens Indian ocean Intermediate waters Most likely New zealand North Antarctic Intermediate Waters Circulation Geochemistry South Pacific World Ocean Circulation Experiment (WOCE) Journal article ftanucanberra https://doi.org/10.1016/j.dsr.2012.11.007 2023-12-15T09:37:15Z Evidence from physical and geochemical tracers measured during the World Ocean Circulation Experiment (WOCE) shows that there are four sub-types of Antarctic Intermediate Water (AAIW) in the South Pacific. The main formation region of AAIW is the southeast Pacific, where fresh, cold, high oxygen, low nutrient, intermediate waters are created. This AAIW is transported north and mixes with Equatorial Pacific Intermediate Waters (EqPIW), themselves a combination of AAIW and nutrient rich, old North Pacific deep waters. 'Tasman' AAIW found in the Coral and Tasman Seas is more saline and warmer than the main subtropical gyre, and appears to have formed from mixing of AAIW with thermocline waters in the Tasman Gyre. Tasman AAIW leaks out of the Tasman basin to the north of New Zealand and along Chatham Rise, and also in the South Tasman Sea via the Tasman Leakage. Another source of relatively fresh, high oxygen, low nutrient, young AAIW comes directly from the Southern Ocean, flowing into the southwest and central South Pacific Basin, west of the East Pacific Rise. This 'Southern Ocean' (SO) AAIW is most likely a mixture of AAIW formed locally at the Subantarctic Front (SAF), and AAIW formed along the SAF in the southeast Pacific or Indian oceans and transported by the Antarctic Circumpolar Current (ACC). Interpreting physical and geochemical tracers, combined with velocity estimates from Argo floats, and previous research, has allowed us to refine the detailed circulation pattern of AAIW in the South Pacific, especially in the topographically complex southwest Pacific. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Australian National University: ANU Digital Collections Antarctic Southern Ocean The Antarctic Pacific Indian New Zealand Deep Sea Research Part I: Oceanographic Research Papers 73 84 98 |
institution |
Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
topic |
Keywords: Antarctic circumpolar current Antarctic intermediate waters Argo Argo float Chatham rise Circulation patterns East Pacific Rise Equatorial Pacific Geochemical tracer High oxygens Indian ocean Intermediate waters Most likely New zealand North Antarctic Intermediate Waters Circulation Geochemistry South Pacific World Ocean Circulation Experiment (WOCE) |
spellingShingle |
Keywords: Antarctic circumpolar current Antarctic intermediate waters Argo Argo float Chatham rise Circulation patterns East Pacific Rise Equatorial Pacific Geochemical tracer High oxygens Indian ocean Intermediate waters Most likely New zealand North Antarctic Intermediate Waters Circulation Geochemistry South Pacific World Ocean Circulation Experiment (WOCE) Bostock, Helen C. Sutton, Phillip Williams, Michael J.M. Opdyke, Bradley Reviewing the circulation and mixing of Antarctic Intermediate Water in the South Pacific using evidence from geochemical tracers and Argo float trajectories |
topic_facet |
Keywords: Antarctic circumpolar current Antarctic intermediate waters Argo Argo float Chatham rise Circulation patterns East Pacific Rise Equatorial Pacific Geochemical tracer High oxygens Indian ocean Intermediate waters Most likely New zealand North Antarctic Intermediate Waters Circulation Geochemistry South Pacific World Ocean Circulation Experiment (WOCE) |
description |
Evidence from physical and geochemical tracers measured during the World Ocean Circulation Experiment (WOCE) shows that there are four sub-types of Antarctic Intermediate Water (AAIW) in the South Pacific. The main formation region of AAIW is the southeast Pacific, where fresh, cold, high oxygen, low nutrient, intermediate waters are created. This AAIW is transported north and mixes with Equatorial Pacific Intermediate Waters (EqPIW), themselves a combination of AAIW and nutrient rich, old North Pacific deep waters. 'Tasman' AAIW found in the Coral and Tasman Seas is more saline and warmer than the main subtropical gyre, and appears to have formed from mixing of AAIW with thermocline waters in the Tasman Gyre. Tasman AAIW leaks out of the Tasman basin to the north of New Zealand and along Chatham Rise, and also in the South Tasman Sea via the Tasman Leakage. Another source of relatively fresh, high oxygen, low nutrient, young AAIW comes directly from the Southern Ocean, flowing into the southwest and central South Pacific Basin, west of the East Pacific Rise. This 'Southern Ocean' (SO) AAIW is most likely a mixture of AAIW formed locally at the Subantarctic Front (SAF), and AAIW formed along the SAF in the southeast Pacific or Indian oceans and transported by the Antarctic Circumpolar Current (ACC). Interpreting physical and geochemical tracers, combined with velocity estimates from Argo floats, and previous research, has allowed us to refine the detailed circulation pattern of AAIW in the South Pacific, especially in the topographically complex southwest Pacific. |
format |
Article in Journal/Newspaper |
author |
Bostock, Helen C. Sutton, Phillip Williams, Michael J.M. Opdyke, Bradley |
author_facet |
Bostock, Helen C. Sutton, Phillip Williams, Michael J.M. Opdyke, Bradley |
author_sort |
Bostock, Helen C. |
title |
Reviewing the circulation and mixing of Antarctic Intermediate Water in the South Pacific using evidence from geochemical tracers and Argo float trajectories |
title_short |
Reviewing the circulation and mixing of Antarctic Intermediate Water in the South Pacific using evidence from geochemical tracers and Argo float trajectories |
title_full |
Reviewing the circulation and mixing of Antarctic Intermediate Water in the South Pacific using evidence from geochemical tracers and Argo float trajectories |
title_fullStr |
Reviewing the circulation and mixing of Antarctic Intermediate Water in the South Pacific using evidence from geochemical tracers and Argo float trajectories |
title_full_unstemmed |
Reviewing the circulation and mixing of Antarctic Intermediate Water in the South Pacific using evidence from geochemical tracers and Argo float trajectories |
title_sort |
reviewing the circulation and mixing of antarctic intermediate water in the south pacific using evidence from geochemical tracers and argo float trajectories |
publisher |
Elsevier |
url |
http://hdl.handle.net/1885/71053 https://doi.org/10.1016/j.dsr.2012.11.007 https://openresearch-repository.anu.edu.au/bitstream/1885/71053/5/f5625xPUB2533_2013.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/71053/7/01_Bostock_Reviewing_the_circulation_and_2013.pdf.jpg |
geographic |
Antarctic Southern Ocean The Antarctic Pacific Indian New Zealand |
geographic_facet |
Antarctic Southern Ocean The Antarctic Pacific Indian New Zealand |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Deep-Sea Research Part 1. Oceanographic Research Papers |
op_relation |
0967-0637 http://hdl.handle.net/1885/71053 doi:10.1016/j.dsr.2012.11.007 https://openresearch-repository.anu.edu.au/bitstream/1885/71053/5/f5625xPUB2533_2013.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/71053/7/01_Bostock_Reviewing_the_circulation_and_2013.pdf.jpg |
op_doi |
https://doi.org/10.1016/j.dsr.2012.11.007 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
73 |
container_start_page |
84 |
op_container_end_page |
98 |
_version_ |
1788057467833286656 |