Publications des scientifiques de l'IRD

Sen Gupta A., McGregor S., van Sebille E., Ganachaud Alexandre, Brown J. N., Santoso A. (2016). Future changes to the Indonesian Throughflow and Pacific circulation : the differing role of wind and deep circulation changes. Geophysical Research Letters, 43 (4), p. 1669-1678. ISSN 0094-8276.

Titre du document
Future changes to the Indonesian Throughflow and Pacific circulation : the differing role of wind and deep circulation changes
Année de publication
2016
Type de document
Article référencé dans le Web of Science WOS:000373109000034
Auteurs
Sen Gupta A., McGregor S., van Sebille E., Ganachaud Alexandre, Brown J. N., Santoso A.
Source
Geophysical Research Letters, 2016, 43 (4), p. 1669-1678 ISSN 0094-8276
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.
Plan de classement
Limnologie physique / Océanographie physique [032]
Description Géographique
OCEAN INDIEN ; PACIFIQUE ; INDONESIE ; AUSTRAL OCEAN
Localisation
Fonds IRD [F B010066715]
Identifiant IRD
fdi:010066715
Contact