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Article Dans Une Revue Geophysical Research Letters Année : 2005

Impact of barrier layer on winter-spring variability of the southeastern Arabian Sea

Résumé

[1] In the present study, we use a coupled model to evaluate the effect of shallow salinity stratification on the sea surface temperature (SST) and on the monsoon onset in the southeastern Arabian Sea (SEAS). A 100-year control experiment shows that the coupled model reproduces the main climatic features in this region in terms of SST, precipitation and barrier layer (BL). A 100-year sensitivity experiment (where BL effects have been suppressed in the SEAS) shows that BL enhances the spring SST warming by 0.5°C, and leads to a statistically significant increase of precipitation in May (3 mm/day) linked to an early (10 to 15 days) monsoon onset. This suggests that the BL extent may be a useful predictor of the summer monsoon onset in the area with a two-month lead-time. However the effect above is mostly concentrated in the SEAS, and there is no significant impact over continental India.
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Dates et versions

hal-00124696 , version 1 (28-10-2020)

Identifiants

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Sébastien Masson, Jing-Jia Luo, Gurvan Madec, Jérôme Vialard, Fabien Durand, et al.. Impact of barrier layer on winter-spring variability of the southeastern Arabian Sea. Geophysical Research Letters, 2005, 32, pp.L07703. ⟨10.1029/2004GL021980⟩. ⟨hal-00124696⟩
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