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Is the biological productivity in the Bay of Bengal light limited?

DRS at CSIR-National Institute of Oceanography

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Title Is the biological productivity in the Bay of Bengal light limited?
 
Creator PrasannaKumar, S.
Narvekar, J.
Nuncio, M.
Kumar, A.
Ramaiah, N.
Sardessai, S.
Gauns, M.
Fernandes, V.
Paul, J.
 
Subject biological productivity
Bay of Bengal
primary productivity
photosynthetically active radiation
 
Description Recent measurements of chlorophyll, primary productivity (PP) and nutrients along the central Bay of Bengal (BOB) during summer, fall and spring intermonsoons showed that the northern bay becomes less productive compared to the south in summer and fall intermonsoon, in spite of the nutrient input to the upper ocean by way of river influx as well as eddypumping. Along the western boundary also, highest PP in the northern bay did not occur during summer or in the fall intermonsoon, but occurred in the spring intermonsoon. The reason for this was explored using diffuse attenuation (Kd(490)) and photosynthetically active radiation (PAR) which indicates the influence of the river flux in curtailing the downward penetration of solar radiation and cloud cover respectively. During summer and fall intermonsoon, biological productivity in the northern BOB is severely limited by the reduced downward penetration of solar radiation due to the large quantities of sediment brought by the adjoining rivers. Though the cloud cover reduces PAR in the northern BOB, this has only a secondary effect in comparison to the light limitation due to turbidity, which showed an order of magnitude increase in the northern Bay
 
Date 2010-06-14T10:04:07Z
2010-06-14T10:04:07Z
2010
 
Type Journal Article
 
Identifier Current Science, vol.98(10); 1331-1339
http://drs.nio.org/drs/handle/2264/3627
 
Language en
 
Rights Copyright [2010]. 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.
 
Publisher Current Science Association