Sources and sinks of CO2 in the west coast of Bay of Bengal

Sarma, V. V. S. S. ; Krishna, M. S. ; Rao, V. D. ; Viswanadham, R. ; Kumar, N. A. ; Kumari, T. R. ; Gawade, L. ; Ghatkar, S. ; Tari, A. (2012) Sources and sinks of CO2 in the west coast of Bay of Bengal Tellus B: Chemical and Physical Meteorology, 64 (1). Article ID 10961. ISSN 1600-0889

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Official URL: http://www.tandfonline.com/doi/full/10.3402/tellus...

Related URL: http://dx.doi.org/10.3402/tellusb.v64i0.10961

Abstract

Observations at high spatial resolution (100×50 km2) in the western continental shelf of Bay of Bengal during southwest monsoon, when peak discharge occurs into the Bay through major rivers of the Indian subcontinent, revealed that freshwater discharge exerts dominant control on the inorganic carbon components in surface waters. Lower than present atmospheric pCO2 levels were found in the Northwestern (NW) than Southwestern (SW) coastal Bay of Bengal. The pCO2 levels in the peninsular rivers were an order of magnitude higher (5000–17000 μatm) than that of atmospheric levels and glacial river Ganges (∼500 μatm). The discharge from the peninsular rivers has a stronger influence in the SW region, whereas the Ganges river discharge has a stronger influences in the NW region. Source or sink of CO2 in the shelf region depends on the discharged river characteristics and the East India Coastal Current that distributes discharged water along the coast. Although during northeast monsoon, the situation is briefly reversed and the region acts as a sink, and on annual scale, the western Bay of Bengal acts as a source for atmospheric CO2 than hitherto hypothesised.

Item Type:Article
Source:Copyright of this article belongs to Taylor & Francis Open.
Keywords:CO2 Fluxes, River Discharge, Monsoon, Coastal Processes, Carbon Cycle
ID Code:105689
Deposited On:01 Feb 2018 12:15
Last Modified:01 Feb 2018 12:15

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