Show simple item record

dc.contributor.authorPrasannaKumar, S.
dc.contributor.authorRamaiah, N.
dc.contributor.authorGauns, M.
dc.contributor.authorSarma, V.V.S.S.
dc.contributor.authorMuraleedharan, P.M.
dc.contributor.authorRaghukumar, S.
dc.contributor.authorDileepKumar, M.
dc.contributor.authorMadhupratap, M.
dc.date.accessioned2009-01-07T10:50:28Z
dc.date.available2009-01-07T10:50:28Z
dc.date.issued2001
dc.identifier.citationDeep-Sea Research (II: Topical Studies in Oceanography), Vol.48; 1115-1126p.
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/1579
dc.description.abstractTime-series observations at a nominally fixed location in the northern Arabian Sea (21 degrees N, 64 degrees E) during the Northeast Monsoon (winter, February) of 1997 showed the prevalence of cold sea-surface temperatures (SST) and deep mixed layers resulting from winter cooling and convection. The covariation of nitrate concentrations in the surface layers and concentrations of chlorophyll a and primary production in the euphotic zone with mixed-layer depth (MLD) and wind suggests that carbon fixation was controlled primarily by physical forcing. Cooler waters during winter 1997 relative to winter 1995 were associated with deeper MLDs, higher nitrate concentrations, elevated primary productivity, and higher chlorophyll a concentrations, leading to the inference that even a 1 degree C decrease in SST could lead to significantly higher primary productivity. Satellite data on sea surface temperature (advanced very high-resolution radiometer, AVHRR) and TOPEX/POSEIDON altimeter data suggest that this interannual variation is of basin-wide spatial scale. After the termination of winter cooling and subsequent warming during the Spring Intermonsoon, the Arabian Sea has low primary production. During the latter period, micro-organisms, i.e. heterotrophic bacteria and microzooplankton-proliferate, a feeding mode through the microbial loop that appears to be inherent to mesozooplankton for sustaining their biomass throughout the year in this region
dc.language.isoen
dc.publisherPergamon
dc.rightsCopyright [2001]. 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.subjectbiological production
dc.subjecttime series
dc.subjectsurface temperature
dc.subjectmixed layer
dc.subjectnitrates
dc.subjectchlorophylls
dc.subjectprimary production
dc.subjectsatellite data
dc.subjectmicroorganisms
dc.subjectzooplankton
dc.subjectbiomass
dc.subjectmonsoons
dc.titlePhysical forcing of biological productivity in the northern Arabian Sea during the northeast monsoon
dc.typeJournal Article


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record