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Impact of barrier layer on winter-spring variability of the southeastern Arabian Sea
- Source :
- Geophysical Research Letters. 32
- Publication Year :
- 2005
- Publisher :
- American Geophysical Union (AGU), 2005.
-
Abstract
- 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.
- Subjects :
- 010504 meteorology & atmospheric sciences
010505 oceanography
Spring season
Stratification (water)
Monsoon
01 natural sciences
Salinity
Barrier layer
Indian ocean
Sea surface temperature
Geophysics
Oceanography
13. Climate action
Climatology
General Earth and Planetary Sciences
Environmental science
14. Life underwater
0105 earth and related environmental sciences
Subjects
Details
- ISSN :
- 00948276
- Volume :
- 32
- Database :
- OpenAIRE
- Journal :
- Geophysical Research Letters
- Accession number :
- edsair.doi...........fdbf878b7eb234a84361185991085ff4