Geochemically tracing the intermediate and surface waters in the Tasman Sea, southwest Pacific
The relatively understudied intermediate waters of the world have been implicated as an important part of the global ocean circulation. This thesis discusses the intermediate waters of the Pacific over space and time. Initially, by using geochemical tracers to look at the present distribution, sourc...
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Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
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2005
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Online Access: | http://hdl.handle.net/1885/46224 http://digitalcollections.anu.edu.au/handle/1885/46224 https://digitalcollections.anu.edu.au/retrieve/3701/06bibliography.pdf.jpg https://digitalcollections.anu.edu.au/bitstream/1885/46224/13/01front.pdf |
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openpolar |
institution |
Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
English |
topic |
South Pacific • Tasman Sea • geochemistry • Antarctic Intermediate Water (AAIW) • ocean circulation • palaeoceanography • sedimentology • southern Great Barrier Reef • Glacial • East Australian Current (EAC) |
spellingShingle |
South Pacific • Tasman Sea • geochemistry • Antarctic Intermediate Water (AAIW) • ocean circulation • palaeoceanography • sedimentology • southern Great Barrier Reef • Glacial • East Australian Current (EAC) Bostock, Helen C Geochemically tracing the intermediate and surface waters in the Tasman Sea, southwest Pacific |
topic_facet |
South Pacific • Tasman Sea • geochemistry • Antarctic Intermediate Water (AAIW) • ocean circulation • palaeoceanography • sedimentology • southern Great Barrier Reef • Glacial • East Australian Current (EAC) |
description |
The relatively understudied intermediate waters of the world have been implicated as an important part of the global ocean circulation. This thesis discusses the intermediate waters of the Pacific over space and time. Initially, by using geochemical tracers to look at the present distribution, sources and mixing of the water masses. Secondly, by using oxygen and carbon isotopes from sediment cores to study changes in Antarctic Intermediate Waters (AAIW) over the late Quaternary in the north Tasman Sea. ¶ The geochemical tracers highlight the presence of three separate intermediate water masses in the Pacific: North Pacific Intermediate Water (NPIW), AAIW and Equatorial Intermediate Water (EqIW). The EqIW has previously been considered an extension of intermediate water masses to the north or south. The unique geochemical characteristics of EqIW indicate, however, that it cannot be formed by direct mixing of the NPIW and AAIW. Geochemical tracers suggest instead that EqIW must also include mixing with nutrient rich, oxygen deficient, old Pacific Deep Water (PDW). . |
format |
Doctoral or Postdoctoral Thesis |
author |
Bostock, Helen C |
author_facet |
Bostock, Helen C |
author_sort |
Bostock, Helen C |
title |
Geochemically tracing the intermediate and surface waters in the Tasman Sea, southwest Pacific |
title_short |
Geochemically tracing the intermediate and surface waters in the Tasman Sea, southwest Pacific |
title_full |
Geochemically tracing the intermediate and surface waters in the Tasman Sea, southwest Pacific |
title_fullStr |
Geochemically tracing the intermediate and surface waters in the Tasman Sea, southwest Pacific |
title_full_unstemmed |
Geochemically tracing the intermediate and surface waters in the Tasman Sea, southwest Pacific |
title_sort |
geochemically tracing the intermediate and surface waters in the tasman sea, southwest pacific |
publishDate |
2005 |
url |
http://hdl.handle.net/1885/46224 http://digitalcollections.anu.edu.au/handle/1885/46224 https://digitalcollections.anu.edu.au/retrieve/3701/06bibliography.pdf.jpg https://digitalcollections.anu.edu.au/bitstream/1885/46224/13/01front.pdf |
geographic |
Antarctic Pacific |
geographic_facet |
Antarctic Pacific |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
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The Australian National University |
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1766268295142440960 |
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ftanucanberra:oai:digitalcollections.anu.edu.au:1885/46224 2023-05-15T13:59:38+02:00 Geochemically tracing the intermediate and surface waters in the Tasman Sea, southwest Pacific Bostock, Helen C 2005-10 http://hdl.handle.net/1885/46224 http://digitalcollections.anu.edu.au/handle/1885/46224 https://digitalcollections.anu.edu.au/retrieve/3701/06bibliography.pdf.jpg https://digitalcollections.anu.edu.au/bitstream/1885/46224/13/01front.pdf en eng Submitted by Daniel Pask (daniel.pask@anu.edu.au) on 2008-02-11T04:20:40Z No. of bitstreams: 6 06bibliography.pdf: 151901 bytes, checksum: 1b15868db093830bd7dc1c0b523d1e2c (MD5) 05conclusions-appendices.pdf: 309146 bytes, checksum: 25ad8d99c9d4e5b85a003a1114015649 (MD5) 04Chapter5-7.pdf: 2264970 bytes, checksum: 5b51d7bbc792bf12719d0862f6c248f9 (MD5) 03Chapters3-4.pdf: 3714028 bytes, checksum: df5d004f25ce98bdf5549372e8462662 (MD5) 02Chapters1-2.pdf: 855958 bytes, checksum: fc963f3e893adc141b872415cfde420f (MD5) 01front.pdf: 173733 bytes, checksum: ee9aaa6b0a0402966effcd6bdd8a3e7c (MD5) Approved for entry into archive by Rosalie Atkinson(rosalie.atkinson@anu.edu.au) on 2008-02-18T04:36:08Z (GMT) No. of bitstreams: 6 06bibliography.pdf: 151901 bytes, checksum: 1b15868db093830bd7dc1c0b523d1e2c (MD5) 05conclusions-appendices.pdf: 309146 bytes, checksum: 25ad8d99c9d4e5b85a003a1114015649 (MD5) 04Chapter5-7.pdf: 2264970 bytes, checksum: 5b51d7bbc792bf12719d0862f6c248f9 (MD5) 03Chapters3-4.pdf: 3714028 bytes, checksum: df5d004f25ce98bdf5549372e8462662 (MD5) 02Chapters1-2.pdf: 855958 bytes, checksum: fc963f3e893adc141b872415cfde420f (MD5) 01front.pdf: 173733 bytes, checksum: ee9aaa6b0a0402966effcd6bdd8a3e7c (MD5) Made available in DSpace on 2008-02-18T04:36:51Z (GMT). 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This thesis discusses the intermediate waters of the Pacific over space and time. Initially, by using geochemical tracers to look at the present distribution, sources and mixing of the water masses. Secondly, by using oxygen and carbon isotopes from sediment cores to study changes in Antarctic Intermediate Waters (AAIW) over the late Quaternary in the north Tasman Sea. ¶ The geochemical tracers highlight the presence of three separate intermediate water masses in the Pacific: North Pacific Intermediate Water (NPIW), AAIW and Equatorial Intermediate Water (EqIW). The EqIW has previously been considered an extension of intermediate water masses to the north or south. The unique geochemical characteristics of EqIW indicate, however, that it cannot be formed by direct mixing of the NPIW and AAIW. Geochemical tracers suggest instead that EqIW must also include mixing with nutrient rich, oxygen deficient, old Pacific Deep Water (PDW). . Doctoral or Postdoctoral Thesis Antarc* Antarctic Australian National University: ANU Digital Collections Antarctic Pacific |