Show simple item record

dc.contributor.authorKeerthi, M.G.
dc.contributor.authorLengaigne, M.
dc.contributor.authorLevy, M.
dc.contributor.authorVialard, J.
dc.contributor.authorParvathi, V.
dc.contributor.authorMontégut, C.D.
dc.contributor.authorEthé, C.
dc.contributor.authorAumont, O.
dc.contributor.authorSuresh, I.
dc.contributor.authorAkhil, V.P.
dc.contributor.authorMuraleedharan, P.M.
dc.date.accessioned2018-06-06
dc.date.accessioned2018-10-23T09:24:57Z
dc.date.available2017-08-01
dc.date.available2018-10-23T09:24:57Z
dc.date.issued2017
dc.identifier.citationBiogeosciences, vol.14(15); 2017; 3615-3632
dc.identifier.issn1726-4189
dc.identifier.urihttps://doi.org/10.5194/bg-14-3615-2017
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/7825
dc.description.abstractThe northern Arabian Sea hosts a winter chlorophyll bloom, triggered by convective overturning in response to cold and dry northeasterly monsoon winds. Previous studies of interannual variations of this bloom only relied on a couple of years of data and reached no consensus on the associated processes. The current study aims at identifying these processes using both ~ 10 years of observations (including remotely sensed chlorophyll data and physical parameters derived from Argo data) and a 20-year-long coupled biophysical ocean model simulation. Despite discrepancies in the estimated bloom amplitude, the six different remotely sensed chlorophyll products analysed in this study display a good phase agreement at seasonal and interannual timescales. The model and observations both indicate that the interannual winter bloom fluctuations are strongly tied to interannual mixed layer depth anomalies ( ~ 0.6 to 0.7 correlation), which are themselves controlled by the net heat flux at the air-sea interface. Our modelling results suggest that the mixed layer depth control of the bloom amplitude ensues from the modulation of nutrient entrainment into the euphotic layer. In contrast, the model and observations both display insignificant correlations between the bloom amplitude and thermocline depth, which precludes a control of the bloom amplitude by daily dilution down to the thermocline depth, as suggested in a previous study.
dc.language.isoen
dc.publisherCopernicus Publications for EGU
dc.relation.ispartofBiogeosciences
dc.relation.isreferencedbySCI
dc.titlePhysical control of interannual variations of the winter chlorophyll bloom in the northern Arabian Sea
dc.typeJournal Article
dc.affiliation.authorCSIR-National Institute of Oceanography, Dona Paula, Goa, India


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record