An ITCZ-like convergence zone over the Indian Ocean in boreal late autumn

Details An ITCZ-like convergence zone over the Indian Ocean in boreal late autumn An ITCZ-like convergence zone over the Indian Ocean in boreal late autumn

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3410811s&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 10, CiteID L10811

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Atmospheric Processes: Ocean/Atmosphere Interactions (0312, 4504), Atmospheric Processes: Precipitation (1854), Atmospheric Processes: Tropical Meteorology

Scientific paper

We examined the convective activity over the tropical Indian Ocean in boreal autumn using satellite-observation data. In November and December, we detected an intertropical convergence zone-like (ITCZ-like) precipitation zone between Maldives and Somalia that is unobserved in the other periods of the year. It accompanied a high sea-surface temperature (SST) north of the equator, and a cold tongue near the equator, similar to the ITCZs over the Pacific and Atlantic Oceans. However, the formation mechanism of the SST anomalies over the Indian Ocean is not the same as that in the Pacific and Atlantic Oceans. The high-SST region forms in early November corresponding to weak sea-surface wind during the monsoon transition. The low SST along the equator appears, associated with the upwelling of the subsurface water.

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