Spectra and gross features of vertical temperature and salinity profiles off the central west coast of India

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dc.contributor.author Varkey, M.J.
dc.contributor.author Nagarajan, R.
dc.date.accessioned 1995-05-21T10:01:10Z
dc.date.accessioned 2017-09-29T13:48:27Z
dc.date.available 1995-05-21T10:01:10Z
dc.date.available 2017-09-29T13:48:27Z
dc.date.issued 1985
dc.identifier.citation Mausam, vol.36; 1985; 57-66
dc.identifier.issn 0252-9416
dc.identifier.uri http://drs.nio.org/drs/handle/2264/6369
dc.description.abstract Continuous vertical profiles of temperature and salinity recorded by a CTD-system from the continental slope and the continental rise off Goa, west coast of India, were used for delineating the gross statistical features of the fine structure and to understand the underlying physical processes. Spectra of temperature and salinity fluctuations from the different stations showed similar patterns and trend of decrease to a wave length of about 10 m, generally with a crest like feature at 20 m wave length. The estimates of spectral density for temperature and salinity were comparatively very high for low wave numbers and showed a difference varying from 1.5 to 2 decades. The spectra for the range 0-0.11 cy/m computed using the perturbation series from a first difference filter and corrected for the filter-response followed an average slope of - 2.9 (range: - 2.57 to - 3.43 and std. dev.: - 0.3) and - 2.6 (range: - 2.05 to - 3.15 and std. dev.: - 0.36) with correlation coefficients - 0.96 and - 0.92 for temperature and salinity, respectively. Coherency estimates were high ( 0.8) for the range 0-0.02 cy/m and were independent of the distance between stations showing the spatial homogeneity of low wave number processes. Correlation coefficients between T' and S' and the individual standard deviations for different layers increased with increasing filter length and generally decreased with depth. Both hoizontal and vertical mixing processes were very active in the upper water column (0-250 m). In the deeper layers, 500 m, non-isopycnal mixing processes were found to be active
dc.language en
dc.publisher India Meteorological Department
dc.relation.ispartof Mausam
dc.relation.isreferencedby SCI
dc.subject Oceanography and Limnology
dc.subject.other vertical mixing
dc.subject.other spectra
dc.subject.other wave number
dc.subject.other structures
dc.subject.other statistics
dc.subject.other vertical profiles
dc.subject.other salinity profiles
dc.subject.other continental slope
dc.subject.other temperature
dc.subject.other ISW, India, West Coast
dc.title Spectra and gross features of vertical temperature and salinity profiles off the central west coast of India
dc.type Journal Article
dc.affiliation.author CSIR-National Institute of Oceanography, Dona Paula, Goa, India


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