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Laboratoire d'études en Géophysique et océanographie spatiales |  |
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Laboratoire d'études en Géophysique et océanographie spatiales | |
| HAL : hal-00406741, version 1 |
| DOI : 10.1175/JCLI4112.1 |
| Fiche détaillée |  Récupérer au format |
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| Journal of Climate 20, 10 (2007) 2109-2120 |
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| Modeling the barrier-layer formation in the South-Eastern Arabian Sea |
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| F. Durand 1D. Shankar 2 |
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| (2007) |
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| The effect of salinity on the formation of the barrier layer ( BL) in the southeastern Arabian Sea ( SEAS) is investigated using an ocean general circulation model. In accordance with previous studies, the runoff distribution and the India-Sri Lanka passage have a strong impact on the realism of the salinity simulated in the area at seasonal time scales. The model simulates a BL pattern in fairly good agreement with available observations. Eulerian and Lagrangian approaches show that the BL is formed by two complementary processes, the arrival of low-salinity surface waters that are cooled en route to the SEAS and downwelling of waters mostly local to the SEAS in the subsurface layers. The surface waters are partly of Bay of Bengal origin and are partly from the SEAS, but are cooled east and south of Sri Lanka in the model. That the downwelled subsurface waters are warm and are not cooled leads to temperature inversions in the BL. The main forcing for this appears to be remotely forced planetary waves. |
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| 1 : | Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) |
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CNRS : UMR5566 – Institut de recherche pour le développement [IRD] – CNES – Observatoire Midi-Pyrénées – INSU – Université Paul Sabatier [UPS] - Toulouse III |
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| 2 : | Physical Oceanography Division |
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National Institute of Oceanography |
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| 3 : | Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) |
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Institut de recherche pour le développement [IRD] – INSU – CNRS : UMR7159 – Université Pierre et Marie Curie [UPMC] - Paris VI – Muséum National d'Histoire Naturelle (MNHN) |
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| 4 : | Laboratoire de physique des océans (LPO) |
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CNRS : UMR6523 – Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) – INSU – Université de Bretagne Occidentale [UBO] – Institut de recherche pour le développement [IRD] – Institut Universitaire Européen de la Mer (IUEM) |
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| Domaine | : | Planète et Univers/Sciences de la Terre/Océanographie |
| hal-00406741, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00406741 | |
| oai:hal.archives-ouvertes.fr:hal-00406741 | |
| Contributeur : Le Gos | |
| Soumis le : Jeudi 23 Juillet 2009, 12:39:12 | |
| Dernière modification le : Jeudi 23 Juillet 2009, 12:39:12 | |
