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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ftird:oai:ird.fr:fdi:010066715 2024-09-15T17:43:18+00:00 Future changes to the Indonesian Throughflow and Pacific circulation : the differing role of wind and deep circulation changes Sen Gupta, A. McGregor, S. van Sebille, E. /Ganachaud, Alexandre Brown, J. N. Santoso, A. OCEAN INDIEN PACIFIQUE INDONESIE AUSTRAL OCEAN 2016 https://www.documentation.ird.fr/hor/fdi:010066715 EN eng https://www.documentation.ird.fr/hor/fdi:010066715 oai:ird.fr:fdi:010066715 Sen Gupta A., McGregor S., van Sebille E., Ganachaud Alexandre, Brown J. N., Santoso A. Future changes to the Indonesian Throughflow and Pacific circulation : the differing role of wind and deep circulation changes. 2016, 43 (4), p. 1669-1678 text 2016 ftird 2024-08-15T05:57:41Z 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 similar to 40 degrees 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. Text Antarc* Antarctic Austral Ocean Southern Ocean IRD (Institute de recherche pour le développement): Horizon |
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Open Polar |
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IRD (Institute de recherche pour le développement): Horizon |
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ftird |
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English |
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 similar to 40 degrees 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. |
format |
Text |
author |
Sen Gupta, A. McGregor, S. van Sebille, E. /Ganachaud, Alexandre Brown, J. N. Santoso, A. |
spellingShingle |
Sen Gupta, A. McGregor, S. van Sebille, E. /Ganachaud, Alexandre Brown, J. N. Santoso, A. Future changes to the Indonesian Throughflow and Pacific circulation : the differing role of wind and deep circulation changes |
author_facet |
Sen Gupta, A. McGregor, S. van Sebille, E. /Ganachaud, Alexandre Brown, J. N. Santoso, A. |
author_sort |
Sen Gupta, A. |
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://www.documentation.ird.fr/hor/fdi:010066715 |
op_coverage |
OCEAN INDIEN PACIFIQUE INDONESIE AUSTRAL OCEAN |
genre |
Antarc* Antarctic Austral Ocean Southern Ocean |
genre_facet |
Antarc* Antarctic Austral Ocean Southern Ocean |
op_relation |
https://www.documentation.ird.fr/hor/fdi:010066715 oai:ird.fr:fdi:010066715 Sen Gupta A., McGregor S., van Sebille E., Ganachaud Alexandre, Brown J. N., Santoso A. Future changes to the Indonesian Throughflow and Pacific circulation : the differing role of wind and deep circulation changes. 2016, 43 (4), p. 1669-1678 |
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1810490221506068480 |