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Carbon dioxide and nitrous oxide in the Arabian Sea

DRS at CSIR-National Institute of Oceanography

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Title Carbon dioxide and nitrous oxide in the Arabian Sea
 
Creator Naqvi, S.W.A.
Sengupta, R.
DileepKumar, M.
 
Subject carbon dioxide
nitrous oxide
vertical distribution
dissolved organic carbon
denitrification
literature reviews
 
Description This review concentrates on some aspects of biogeochemical cycling of carbon and nitrogen in the Arabian Sea with emphasis on the atmospheric fluxes of CO sub(2) and N sub(2)O. The Arabian Sea appears to serve as a net sink for combined nitrogen of approx 3 x 10 sup(13) gN y sup(-1). Inflow of deep and bottom waters should make up this deficit providing a net carbon input of approx 1.75 x 10 sup(15) g y sup(-1). This appears to sustain high atmospheric fluxes of CO sub(2) observed particularly during the summer monsoon. The distribution of dissolved organic carbon (DOC) reveals significant gradients corresponding to changes in total carbon dioxide (TCO sub(2)), oxygen consomption and nitrate deficits, suggesting an important role for DOC in the oceanic biogeochemical cycles. The results on the activity of the respiratory electron transport system reinforce this view. Steady northward increases in TCO sub(2) are observed at all depths due to regeneration from biogenic debris which also seems to increase from west to east. Large regional variations occur in the regeneration of soft tissue and skeletal material. The Arabian Sea appears to be a significant source for atmospheric N sub(2)O. The N sub(2)O distribution suggests substantial losses to reducing zones, implying a very rapid tumover of N@l2)O within the region
 
Date 2009-05-06T10:36:09Z
2009-05-06T10:36:09Z
1993
 
Type Book Chapter
 
Identifier Interactions between global climate subsystems: The legacy of Hann, Ed. by: McBean, G.A.; Hantel, M. 85-92p.
http://drs.nio.org/drs/handle/2264/2816
 
Language en
 
Relation Geophysical Monographs, 15
 
Rights Copyright [1993]. 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 American Geophysical Union