Record Details

Coccolithophores from the central Arabian Sea: Sediment trap results

DRS at CSIR-National Institute of Oceanography

View Archive Info
 
 
Field Value
 
Title Coccolithophores from the central Arabian Sea: Sediment trap results
 
Creator Mergulhao, L.P.
Mohan, R.
Murty, V.S.N.
Guptha, M.V.S.
Sinha, D.K.
 
Subject Central Arabian Sea
temporal variation
Gephyrocapsa oceanica
Emiliania huxleyi
 
Description Sediment trap samples collected from a depth of 1018m in the Central Arabian Sea Trap (CAST) at 14 degrees 28.2 minutes N, 64 degrees 35.8 minutes E were analyzed for temporal variation of coccolithophore fluxes from October 1993 to August 1994. Out of the twenty species of coccolithophores encountered, Gephyrocapsa oceanica, Emiliania huxleyi, Umbilicosphaera sibogae and Umbellosphaera irregularis were the most abundant. The total coccolithophore fluxes ranged from 28.5 × 10 sup(6) m sup(-2) d sup(-1) to 50.3 × 10 sup(6) m sup(-2) d sup(-1) showing seasonality with higher fluxes during the northeast (NE) monsoon and lower fluxes during the spring intermonsoon. The higher fluxes were attributed to the enhancement of primary production in the central Arabian Sea due to southward extent of nutrients from the northeast Arabian Sea by the prevailing surface currents. Similarly, the occurrences of relatively lower coccolithophore fluxes during the spring intermonsoon and southwest (SW) monsoon were attributed to the low nutrients in the warm, shallow surface mixed layer and downwelling to the south of Findlater Jet respectively in the central Arabian Sea. Some of the coccolithophore species such as E. huxleyi, G. oceanica, Calcidiscus leptoporus and Umbellosphaera tenuis showed signs of dissolution.
 
Date 2006-09-03T07:25:53Z
2006-09-03T07:25:53Z
2006
 
Type Journal Article
 
Identifier Journal of Earth System Science, vol.115(4), 415-428p.
http://drs.nio.org/drs/handle/2264/354
 
Language en
 
Format 1321984 bytes
application/pdf
 
Publisher Indian Academy of Sciences