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dc.contributor.authorSardessai, S.
dc.contributor.authorShetye, S.S.
dc.contributor.authorMaya, M.V.
dc.contributor.authorMangala, K.R.
dc.contributor.authorPrasannaKumar, S.
dc.date.accessioned2010-08-10T09:11:34Z
dc.date.available2010-08-10T09:11:34Z
dc.date.issued2010
dc.identifier.citationMarine Environmental Research, vol.70(3-4); 272-282
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/3695
dc.description.abstractNutrient characteristics of four water masses in the light of their thermohaline properties are examined in the eastern Equatorial Indian Ocean during winter, spring and summer monsoon. The presence of low salinity water mass with ‘Surface enrichments’ of inorganic nutrients was observed relative to 20 m in the mixed layer. Lowest oxygen levels of 19 mu M at 3 degrees N in the euphotic zone indicate mixing of low oxygen high salinity Arabian Sea waters with the equatorial Indian Ocean. The seasonal variability of nutrients was regulated by seasonally varying physical processes like thermocline elevation, meridional and zonal transport, the equatorial undercurrent and biological processes of uptake and remineralisation. Circulation of Arabian Sea high salinity waters with nitrate deficit could also be seen from low N/P ratio with a minimum of 8.9 in spring and a maximum of 13.6 in winter. This large deviation from Redfield N/P ratio indicates the presence of denitrified high salinity waters with a seasonal nitrate deficit ranging from -4.85 to 1.52 in the Eastern Equatorial Indian Ocean
dc.language.isoen
dc.publisherElsevier
dc.rightsAn edited version of this paper was published by Elsevier. Copyright [2010] Elsevier
dc.subjectThermohaline characteristics
dc.subjectWater masses
dc.subjectDissolved oxygen
dc.subjectNutrient characteristics
dc.subjectNitrate deficit
dc.titleNutrient characteristics of the water masses and their seasonal variability in the eastern equatorial Indian Ocean
dc.typeJournal Article


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