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dc.contributor.authorSridevi, B.
dc.contributor.authorMurty, T.V.R.
dc.contributor.authorSadhuram, Y.
dc.contributor.authorRao, M.M.M.
dc.contributor.authorManeesha, K.
dc.contributor.authorSujithKumar, S.
dc.contributor.authorPrasanna, P.L.
dc.date.accessioned2010-06-14T10:16:26Z
dc.date.available2010-06-14T10:16:26Z
dc.date.issued2010
dc.identifier.citationEstuarine, Coastal and Shelf Science, vol.88(2); 249-259
dc.identifier.otherno
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/3632
dc.description.abstractInternal waves (IW) are identified off Bhimilipatnam, east coast of India, from the time series CTD (hourly interval)and thermistor chain data (2 min interval) collected during 23-25 Feb 2007.The measurements were carried out at 94m water depth on the continental shelf edge. These datasets are used to describe the characteristics of IW and their impact on acoustic fields. Garrett and Munk (GM) model has been used to predict the characteristics of low frequency (LF) IW with space and time. Active IW are seen in the layers54m-94 m with a velocity of 0.548 km h sup(-1) and the wavelengths of the order of 0.03 km-21.8km. The model could capture the IW features in the thermocline region accurately than at the bottom.This could be due to the limitation of the model which considers linearity. High frequency IW observed at the bottom could be due to the advection of tidal currents over the shallow irregular bottom in the presence of stratification. The study emphasizes linear IW rather than transient non-linear waves induced by tidal interaction with topography. Acoustic simulation results for low frequency IW field reveal that the intensity loss anomaly of eigenrays was found to be 2.86 dB-15.59 dB in the water column and maximum(38.48dB) was observed at the bottom due to the bottom interaction. Our results are well compared with those reported earlier from simulation and acoustic field experiments in the Northern IndianOcean.
dc.language.isoen
dc.publisherElsevier
dc.relation.requiresEstuar_Coast_Shelf_Sci_88_249.jpg
dc.rightsAn edited version of this paper was published by Elsevier. Copyright [2010] Elsevier
dc.subjectLow frequency
dc.subjectInternal waves
dc.subjectThermistor chain
dc.subjectGM model
dc.subjectAcoustic simulation
dc.titleImpact of internal waves on sound propagation off Bhimilipatnam, east coast of India
dc.typeJournal Article


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