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Anomalous current structure in the eastern equatorial Indian Indian Ocean during the south-west monsoon of 1994

DRS at CSIR-National Institute of Oceanography

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Title Anomalous current structure in the eastern equatorial Indian Indian Ocean during the south-west monsoon of 1994
 
Creator Unnikrishnan, A.S.
Murty, V.S.N.
Babu, M.T.
Gopinathan, C.K.
Charyulu, R.J.K.
 
Subject hydrographic data
data analysis
thermohaline circulation
ocean currents
geostrophic flow
monsoons
 
Description Analysis of hydrographic data collected along 80 degrees, 84 degrees and 88 degrees E between 5 degrees N and 3 degrees S during peak south-west monsoon (July-August) of the eastern equatorial Indian Ocean (EEIO) reveals thermohaline variability and anomalous current structure in the upper ocean. A warm (28.4-28.8 degrees C) and less-saline (33 to 34.8) deep (60-75 m) homogeneous layer characterizes the surface mixed layer. The south-west monsoon current, advecting the Arabian Sea High Salinity Water eastwards, appears as an eastward undercurrent (approx. 50 cm s sup(-1)) below 125 m at 80 degrees E between 1 degree and 1.5 degrees N and in the upper 100 m in the vicinity of the equator with an eastward increase of core velocity between 75 and 100 m. This undercurrent has a transport of 4 Sv at 80 degrees E. The westward flow in the upper layers north of he equator is anomalous, as the surface winds have an eastward zonal component. The associated westward transport is 44 Sv between 84 degrees and 88 degrees E. The equatorial westward flow appears to be influenced by the anomalously strong north-westward coastal current off Sumatra and westward propagating Rossby waves
 
Date 2009-01-07T10:54:46Z
2009-01-07T10:54:46Z
2001
 
Type Journal Article
 
Identifier Marine and Freshwater Research, Vol.52; 727-734p.
http://drs.nio.org/drs/handle/2264/1590
 
Language en
 
Rights Copyright [2001]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher CSIRO, Australia