Acoustic propagations in the presence of a subsurface cold core eddy in the Bay of Bengal - A case study

Show simple item record PrasannaKumar, S. Navelkar, G.S. Murty, T.V.R. Murty, C.S. 2009-05-05T05:32:18Z 2009-05-05T05:32:18Z 1994
dc.identifier.citation Proceedings of the Pacific Ocean Remote Sensing Conference (PORSEC - 94), Melbourne, Australia, 1-4 March 1994, 185-192p.
dc.description.abstract Acoustic characteristics of a cold core eddy, observed in the Bay of Bengal during southwest monsoon period is studied using CTD data along the western boundary. The presence of eddy brings about a reduction in the ambient sound speEd. by 10 m.s sup(-1). The depth of SOFAR channel axis, which should have shown a deepening trend in this region remains constant under the influence of eddy. Ray tracing using a range-independent ray trace program showed that the arrivals arc delayEd. by about 100-200 ms under the influence of the eddy. The acoustic intensity computed along the eigen ray passing through the eddy suffers an additional loss of the order of 20-25 dB. The simulated travel time perturbations associated with the eddy was inverted using singular value decomposition. From the numerical experiments it was found that inversion carried out using 18 eigen rays with 9 layers adequately resolve the eddy profile using 9 eigen modes
dc.language.iso en
dc.publisher PORSEC-94, Melbourne, Australia
dc.rights Copyright [1994]. 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.
dc.subject acoustics
dc.subject oceanic eddies
dc.subject CTD observations
dc.subject ambient noise
dc.subject sound velocity
dc.subject sound propagation
dc.subject acoustic tomography
dc.title Acoustic propagations in the presence of a subsurface cold core eddy in the Bay of Bengal - A case study
dc.type Conference Article

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