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Respiration rates in subsurface waters of the northern Indian Ocean: Evidence for low decomposition rates of organic matter within the water column in the Bay of Bengal

DRS at CSIR-National Institute of Oceanography

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Title Respiration rates in subsurface waters of the northern Indian Ocean: Evidence for low decomposition rates of organic matter within the water column in the Bay of Bengal
 
Creator Naqvi, S.W.A.
Shailaja, M.S.
DileepKumar, M.
Sengupta, R.
 
Subject respiration
subsurface water
degradation
organic matter
water column
organic carbon
oxygen
carbon dioxide
 
Description Depth profiles of activity of the respirtory Electron Transport System (ETS) have been generated at several locations in the northern Indian Ocean. The results reveal much lower ETS activities in subsurface waters of the Bay of Bengal than those measured in the Arabian Sea. Lower respiratin rates in the Bay of Bengal are corroborated by the much weaker north-south gradients in oxygen and total carbon dioxide. These are, however, in conflict with the higher sinking fluxes of organic carbon measured with sediment traps. The observations support the view that particulate organic matter may undergo a lesser degree of oxidation in the water column through its incorportion into rapidly sinking matter, perhaps as a result of the massive inputs of terrigenous matter in the Bay of Bengal. The differential respiration rates may cause changes in the distribution of suspended particulate matter and may also explain why the Bay of Bengal is not a site of water-column denitrification in spite of an apparently slower renewal of the intermediate waters as compared to the Arabian Sea
 
Date 2009-01-21T09:30:18Z
2009-01-21T09:30:18Z
1996
 
Type Journal Article
 
Identifier Deep-Sea Research (II: Topical Studies in Oceanography), Vol.43; 73-81p.
http://drs.nio.org/drs/handle/2264/2186
 
Language en
 
Rights Copyright [1996]. 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 Pergamon