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Hydrographic characteristics of central Bay of Bengal waters during southwest monsoon of 1983

DRS at CSIR-National Institute of Oceanography

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Title Hydrographic characteristics of central Bay of Bengal waters during southwest monsoon of 1983
 
Creator Somayajulu, Y.K.
Murty, T.V.R.
PrasannaKumar, S.
Sastry, J.S.
 
Subject Oceanography and Limnology
acoustic tomography
gyres
monsoons
ekman transport
energy transfer
surface temperature
seasonal variations
hydrography
ISW, Bengal Bay
 
Description During cruises 120 and 124 of R V Gaveshani two sections, viz. Visakhapatnam - Port Blair and Madras - Port Blair, in Bay of Bengal have been covered twice. The sea surface temperature (SST) shows a decrease of about 2 degrees C from premonsoon to postmonsoon. The loss of energy from the sea surface to the atmosphere by evaporational cooling due to strong monsoonal winds and reduction in the incoming solar radiation by clouds may result in a net loss of energy (cooling). During premonsoon the isotherms off Visakhapatnam show an upward slope towards the coast resulting from the Ekman drift, forcing the cooler denser subsurface water to come up under a northerly flow. However, the isothermal pattern during postmonsoon reveals the possibility of a thermal adjustment within the water column by way of advection as manifested by stretching of isotherms. Distribution of relative velocities along the sections indicates the presence of gyres (zones of convergence and divergence). There appears a remarkable variation of these gyral systems from premonsoon to postmonsoon
 
Date 1995-07-23T10:01:32Z
2017-09-29T13:48:10Z
1995-07-23T10:01:32Z
2017-09-29T13:48:10Z
1987
 
Type Journal Article
 
Identifier Indian Journal of Marine Sciences, vol.16; 1987; 207-217
0379-5136
http://drs.nio.org/drs/handle/2264/6049
 
Language en
 
Relation Indian J Mar Sci
SCI
 
Publisher CSIR-NISCAIR