Shallow water masses and their connectivity along the southern Australian continental margin
Four water masses are identified and described using hydrographic, nutrient and stable isotope data for the top 1000 m water depth of the southern Australian continental margin, from Cape Leeuwin to Tasmania. Three are identified from previous literature on the southeast Indian Ocean: Subtropical Su...
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/206748 2024-01-14T10:00:20+01:00 Shallow water masses and their connectivity along the southern Australian continental margin Richardson, Laura Middleton, J.F. Kyser, Thomas K James, Noel P Opdyke, Bradley application/pdf http://hdl.handle.net/1885/206748 https://doi.org/10.1016/j.dsr.2019.103083 https://openresearch-repository.anu.edu.au/bitstream/1885/206748/3/01_Richardson_Shallow_water_masses_and_their_2019.pdf.jpg en_AU eng Elsevier 0967-0637 http://hdl.handle.net/1885/206748 doi:10.1016/j.dsr.2019.103083 https://openresearch-repository.anu.edu.au/bitstream/1885/206748/3/01_Richardson_Shallow_water_masses_and_their_2019.pdf.jpg © 2019 Elsevier Ltd Deep-Sea Research Part 1. Oceanographic Research Papers Journal article ftanucanberra https://doi.org/10.1016/j.dsr.2019.103083 2023-12-15T09:33:23Z Four water masses are identified and described using hydrographic, nutrient and stable isotope data for the top 1000 m water depth of the southern Australian continental margin, from Cape Leeuwin to Tasmania. Three are identified from previous literature on the southeast Indian Ocean: Subtropical Surface Water (STSW), Tasmanian Subantarctic Mode Water (TSAMW) and Tasmanian Intermediate Water (TIW), and one is newly identified and named: South Australian Basin Central Water (SABCW). STSW (0–250 m) is transported east by the Leeuwin Current System and is modified by heating and evaporation along the subtropical continental shelf. SABCW (250–400 m) and TSAMW (400–650 m) form southwest of Tasmania from deep winter mixing in the region: SABCW at the Subtropical Front and TSAMW north of the Subantarctic Front. TIW (>650 m) forms southwest of Tasmania from mixing of warm, saline Antarctic Intermediate Water from the Tasman Sea and cool, fresh Antarctic Intermediate Water from the Antarctic Circumpolar Current. SABCW, TSAMW and TIW are transported west along the slope by the Flinders Current System, here defined as the western slope-trapped Flinders Current, Tasman Outflow and equatorward Sverdrup transport. Water mass distributions on the slope identify the interface between subantarctic water from the Southern Ocean and subtropical water transported by the Leeuwin Current System. This interface is ~300 m during winter and ~250 m during summer, but can be 150 m during summer in upwelling regions and off western Tasmania. Furthermore, stable isotope data of the water masses south and west of Australia show connectivity between the Subantarctic Zone, the southern Australian margin and the western Australian margin. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Australian National University: ANU Digital Collections Antarctic Southern Ocean The Antarctic Indian Flinders ENVELOPE(-66.667,-66.667,-69.267,-69.267) Deep Sea Research Part I: Oceanographic Research Papers 152 103083 |
institution |
Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
English |
description |
Four water masses are identified and described using hydrographic, nutrient and stable isotope data for the top 1000 m water depth of the southern Australian continental margin, from Cape Leeuwin to Tasmania. Three are identified from previous literature on the southeast Indian Ocean: Subtropical Surface Water (STSW), Tasmanian Subantarctic Mode Water (TSAMW) and Tasmanian Intermediate Water (TIW), and one is newly identified and named: South Australian Basin Central Water (SABCW). STSW (0–250 m) is transported east by the Leeuwin Current System and is modified by heating and evaporation along the subtropical continental shelf. SABCW (250–400 m) and TSAMW (400–650 m) form southwest of Tasmania from deep winter mixing in the region: SABCW at the Subtropical Front and TSAMW north of the Subantarctic Front. TIW (>650 m) forms southwest of Tasmania from mixing of warm, saline Antarctic Intermediate Water from the Tasman Sea and cool, fresh Antarctic Intermediate Water from the Antarctic Circumpolar Current. SABCW, TSAMW and TIW are transported west along the slope by the Flinders Current System, here defined as the western slope-trapped Flinders Current, Tasman Outflow and equatorward Sverdrup transport. Water mass distributions on the slope identify the interface between subantarctic water from the Southern Ocean and subtropical water transported by the Leeuwin Current System. This interface is ~300 m during winter and ~250 m during summer, but can be 150 m during summer in upwelling regions and off western Tasmania. Furthermore, stable isotope data of the water masses south and west of Australia show connectivity between the Subantarctic Zone, the southern Australian margin and the western Australian margin. |
format |
Article in Journal/Newspaper |
author |
Richardson, Laura Middleton, J.F. Kyser, Thomas K James, Noel P Opdyke, Bradley |
spellingShingle |
Richardson, Laura Middleton, J.F. Kyser, Thomas K James, Noel P Opdyke, Bradley Shallow water masses and their connectivity along the southern Australian continental margin |
author_facet |
Richardson, Laura Middleton, J.F. Kyser, Thomas K James, Noel P Opdyke, Bradley |
author_sort |
Richardson, Laura |
title |
Shallow water masses and their connectivity along the southern Australian continental margin |
title_short |
Shallow water masses and their connectivity along the southern Australian continental margin |
title_full |
Shallow water masses and their connectivity along the southern Australian continental margin |
title_fullStr |
Shallow water masses and their connectivity along the southern Australian continental margin |
title_full_unstemmed |
Shallow water masses and their connectivity along the southern Australian continental margin |
title_sort |
shallow water masses and their connectivity along the southern australian continental margin |
publisher |
Elsevier |
url |
http://hdl.handle.net/1885/206748 https://doi.org/10.1016/j.dsr.2019.103083 https://openresearch-repository.anu.edu.au/bitstream/1885/206748/3/01_Richardson_Shallow_water_masses_and_their_2019.pdf.jpg |
long_lat |
ENVELOPE(-66.667,-66.667,-69.267,-69.267) |
geographic |
Antarctic Southern Ocean The Antarctic Indian Flinders |
geographic_facet |
Antarctic Southern Ocean The Antarctic Indian Flinders |
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/1885/206748 doi:10.1016/j.dsr.2019.103083 https://openresearch-repository.anu.edu.au/bitstream/1885/206748/3/01_Richardson_Shallow_water_masses_and_their_2019.pdf.jpg |
op_rights |
© 2019 Elsevier Ltd |
op_doi |
https://doi.org/10.1016/j.dsr.2019.103083 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
152 |
container_start_page |
103083 |
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1788064808008941568 |