Future changes to the Indonesian Throughflow and Pacific circulation: The differing role of wind and deep circulation changes
Climate models consistently project a substantial decrease in the Indonesian Throughflow (ITF) in response to enhanced greenhouse warming. On interannual timescales ITF changes are largely related to tropical Pacific wind variability. However, on the multidecadal timescales investigated here we demo...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/350831 2023-11-12T04:02:30+01:00 Future changes to the Indonesian Throughflow and Pacific circulation: The differing role of wind and deep circulation changes Sen Gupta, Alex McGregor, Shayne Van Sebille, Erik Ganachaud, Alexandre Brown, Jaclyn N. Santoso, Agus Sub Physical Oceanography Marine and Atmospheric Research 2016-02-28 application/pdf https://dspace.library.uu.nl/handle/1874/350831 en eng 0094-8276 https://dspace.library.uu.nl/handle/1874/350831 info:eu-repo/semantics/OpenAccess Climate Model Intercomparison Project climate projections Indonesian throughflow Island Rule Pacific Ocean wind-driven circulation Geophysics Earth and Planetary Sciences(all) Article 2016 ftunivutrecht 2023-11-01T23:14:03Z Climate models consistently project a substantial decrease in the Indonesian Throughflow (ITF) in response to enhanced greenhouse warming. On interannual timescales ITF changes are largely related to tropical Pacific wind variability. However, on the multidecadal timescales investigated here we demonstrate that regional winds and associated changes in the upper ocean circulation cannot explain the projected ITF decrease. Instead, the decrease is related to a weakening in the northward flow of deep waters entering the Pacific basin at ~40°S and an associated reduction in the net basin-wide upwelling to the north of the southern tip of Australia. This can be traced back to consistent changes in the Antarctic Circumpolar Current and Southern Ocean overturning, although questions still remain as to the ultimate drivers. In contrast to the ITF decrease, substantial projected changes to the upper ocean circulation of the Pacific basin are well explained by robust changes in the surface winds. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Utrecht University Repository Antarctic Pacific Southern Ocean The Antarctic |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
topic |
Climate Model Intercomparison Project climate projections Indonesian throughflow Island Rule Pacific Ocean wind-driven circulation Geophysics Earth and Planetary Sciences(all) |
spellingShingle |
Climate Model Intercomparison Project climate projections Indonesian throughflow Island Rule Pacific Ocean wind-driven circulation Geophysics Earth and Planetary Sciences(all) Sen Gupta, Alex McGregor, Shayne Van Sebille, Erik Ganachaud, Alexandre Brown, Jaclyn N. Santoso, Agus Future changes to the Indonesian Throughflow and Pacific circulation: The differing role of wind and deep circulation changes |
topic_facet |
Climate Model Intercomparison Project climate projections Indonesian throughflow Island Rule Pacific Ocean wind-driven circulation Geophysics Earth and Planetary Sciences(all) |
description |
Climate models consistently project a substantial decrease in the Indonesian Throughflow (ITF) in response to enhanced greenhouse warming. On interannual timescales ITF changes are largely related to tropical Pacific wind variability. However, on the multidecadal timescales investigated here we demonstrate that regional winds and associated changes in the upper ocean circulation cannot explain the projected ITF decrease. Instead, the decrease is related to a weakening in the northward flow of deep waters entering the Pacific basin at ~40°S and an associated reduction in the net basin-wide upwelling to the north of the southern tip of Australia. This can be traced back to consistent changes in the Antarctic Circumpolar Current and Southern Ocean overturning, although questions still remain as to the ultimate drivers. In contrast to the ITF decrease, substantial projected changes to the upper ocean circulation of the Pacific basin are well explained by robust changes in the surface winds. |
author2 |
Sub Physical Oceanography Marine and Atmospheric Research |
format |
Article in Journal/Newspaper |
author |
Sen Gupta, Alex McGregor, Shayne Van Sebille, Erik Ganachaud, Alexandre Brown, Jaclyn N. Santoso, Agus |
author_facet |
Sen Gupta, Alex McGregor, Shayne Van Sebille, Erik Ganachaud, Alexandre Brown, Jaclyn N. Santoso, Agus |
author_sort |
Sen Gupta, Alex |
title |
Future changes to the Indonesian Throughflow and Pacific circulation: The differing role of wind and deep circulation changes |
title_short |
Future changes to the Indonesian Throughflow and Pacific circulation: The differing role of wind and deep circulation changes |
title_full |
Future changes to the Indonesian Throughflow and Pacific circulation: The differing role of wind and deep circulation changes |
title_fullStr |
Future changes to the Indonesian Throughflow and Pacific circulation: The differing role of wind and deep circulation changes |
title_full_unstemmed |
Future changes to the Indonesian Throughflow and Pacific circulation: The differing role of wind and deep circulation changes |
title_sort |
future changes to the indonesian throughflow and pacific circulation: the differing role of wind and deep circulation changes |
publishDate |
2016 |
url |
https://dspace.library.uu.nl/handle/1874/350831 |
geographic |
Antarctic Pacific Southern Ocean The Antarctic |
geographic_facet |
Antarctic Pacific Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
0094-8276 https://dspace.library.uu.nl/handle/1874/350831 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782334517848047616 |