AustralieFrV1, Main, Exploration, bibRecord, 005D15

Drivers of the projected changes to the Pacific Ocean equatorial circulation

Identifieur interne : 005D15 ( Main/Exploration ); précédent : 005D14; suivant : 005D16

Drivers of the projected changes to the Pacific Ocean equatorial circulation

Auteurs : A. Sen Gupta [Australie] ; A. Ganachaud [France] ; S. Mcgregor [Australie] ; J. N. Brown [Australie] ; L. Muir [États-Unis]

Source :

Geophysical research letters [ 0094-8276 ] ; 2012.

RBID : Pascal:12-0250190

Descripteurs français

Pascal (Inist)
- Projet, Océan Pacifique, Circulation, Modèle climat, Etude comparative, Transport, Zone côtière, Sous courant, Courant marin, Réduction, Résistance mécanique, Alizé, El Nino, Oscillation australe, Plomb, Echelle temps, Intensification, Action vent, Hémisphère Sud, Equation eau peu profonde, Analyse tendance, Vent, Projection, Mers d'Indonésie, Modèle CMIP3, Nouvelle Guinée, Ile Mindanao, Océan Pacifique Central.
Wicri :
- topic : Océan Pacifique, Plomb.

English descriptors

KwdEn :
- Central Pacific, Climate models, Comparative study, El Nino, Indonesian Seas, Intensification, Mindanao, New Guinea, Pacific Ocean, Shallow-water equations, Southern Hemisphere, Southern oscillation, Trade wind, Undercurrent, Wind effect, circulation, coastal zone, lead, ocean currents, projection, projects, reduction, strength, time scales, transport, trend-surface analysis, winds.

Abstract

Climate models participating in the third Coupled Model Inter Comparison Project (CMIP3) suggest a significant increase in the transport of the New Guinea Coastal Undercurrent (NGCU) and the Equatorial Undercurrent (EUC, in the central and western Pacific) and a decrease in the Mindanao current and the Indonesian Throughflow. Most models also project a reduction in the strength of the equatorial Trade winds. Typically, on ENSO time scales, a weakening of the equatorial easterlies would lead to a reduction in EUC strength in the central Pacific. The strengthening of the EUC projected for longer timescales, can be explained by a robust projected intensification of the south-easterly trade winds and an associated off-equatorial wind-stress curl change in the Southern Hemisphere. This drives the intensification of the NGCU and greater water input to the EUC in the west. A 1<1/2>-layer shallow water model, driven by projected wind stress trends from the CMIP3 models demonstrates that the projected circulation changes are consistent with a purely wind driven response. While the equatorial winds weaken for both El Niño events and in the projections, the ocean response and the mechanisms driving the projected wind changes are distinct from those operating on interannual timescales. Citation: Sen Gupta, A., A. Ganachaud, S. McGregor, J. N. Brown, and L. Muir (2012), Drivers of the projected changes to the Pacific Ocean equatorial circulation,

Affiliations:

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Le document en format XML

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<term>Zone côtière</term>
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<term>Courant marin</term>
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<term>Résistance mécanique</term>
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<term>Modèle CMIP3</term>
<term>Nouvelle Guinée</term>
<term>Ile Mindanao</term>
<term>Océan Pacifique Central</term>
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<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Océan Pacifique</term>
<term>Plomb</term>
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<front><div type="abstract" xml:lang="en">Climate models participating in the third Coupled Model Inter Comparison Project (CMIP3) suggest a significant increase in the transport of the New Guinea Coastal Undercurrent (NGCU) and the Equatorial Undercurrent (EUC, in the central and western Pacific) and a decrease in the Mindanao current and the Indonesian Throughflow. Most models also project a reduction in the strength of the equatorial Trade winds. Typically, on ENSO time scales, a weakening of the equatorial easterlies would lead to a reduction in EUC strength in the central Pacific. The strengthening of the EUC projected for longer timescales, can be explained by a robust projected intensification of the south-easterly trade winds and an associated off-equatorial wind-stress curl change in the Southern Hemisphere. This drives the intensification of the NGCU and greater water input to the EUC in the west. A 1<1/2>-layer shallow water model, driven by projected wind stress trends from the CMIP3 models demonstrates that the projected circulation changes are consistent with a purely wind driven response. While the equatorial winds weaken for both El Niño events and in the projections, the ocean response and the mechanisms driving the projected wind changes are distinct from those operating on interannual timescales. Citation: Sen Gupta, A., A. Ganachaud, S. McGregor, J. N. Brown, and L. Muir (2012), Drivers of the projected changes to the Pacific Ocean equatorial circulation,</div>
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Drivers of the projected changes to the Pacific Ocean equatorial circulation

Drivers of the projected changes to the Pacific Ocean equatorial circulation

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri