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Surface currents in the equatorial Indian Ocean during spring and fall - An altimetry based analysis

DRS at CSIR-National Institute of Oceanography

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Title Surface currents in the equatorial Indian Ocean during spring and fall - An altimetry based analysis
 
Creator Antony, M.K.
Somayajulu, Y.K.
 
Subject ocean currents
surface currents
geostrophic flow
jets
wind-driven currents
altimetry
annual variation
 
Description This communication presents the results of a study aimed at investigating the nature and variability of surface currents in the equatorial Indian Ocean between 5 degrees N and 5 degrees S during spring and fall seasons. Geostrophic surface currents were computed using 1 degrees x 1 degrees gridded sea surface height (SSH) anomalies derived from TOPEX-POSEIDON (T/P) altimeter data over the years, 1993 to 2000. The results show that the spring Wyrtki jet derived between April and June is restricted to just south of the equator, whereas, the fall jet derived between October and December is almost symmetrical about the equator. These jets are found to be about 400 km wide with a speed of 70-80 cm/sec. Maximum duration of these wind-driven, eastward flows is about three months in both the seasons. The tendency of these jets to be either weak or totally absent during 1997-98 is attributed to the strong ENSO-IOD event of 1997.
 
Date 2008-08-09T10:02:42Z
2008-08-09T10:02:42Z
2002
 
Type Conference Article
 
Identifier Proceedings of The Sixth Pan Ocean Remote Sensing Conference (PORSEC) Bali, 3-6 September 2002: Remote sensing and ocean science for marine resources exploration and environment. Vol. 2. eds. by: Pasaribu, B.P.; Kaswadji, R.; Nurjaya, I.W.; Gaol, J.L., 51-53p.
http://drs.nio.org/drs/handle/2264/1403
 
Language en
 
Publisher PORSEC 2002 Secretariat; Bogor; Indonesia