Issue 4, 2002
From the journal:

Journal of Environmental Monitoring

Seasonal effects on the air–water carbon dioxide exchange in the Hooghly estuary, NE coast of Bay of Bengal, India

S. K. Mukhopadhyay,a   H. Biswas,a   T. K. De,a   S. Senb  and  T. K. Jana*a  

* Corresponding authors

a Department of Marine Science, University of Calcutta, 35 B. C. Road, Calcutta, India
E-mail: tkjana@hotmail.com
Fax: 91-033-476 4419

b Department of Chemistry, University of Calcutta, 92 A. P. C. Road, Calcutta, India

Abstract

Monthly variation of CO2 fugacity (fCO2) in surface water and related atmospheric exchanges were measured in the Hooghly estuary which is one of the most important estuaries, since it is fed by one of the world's largest rivers, the Ganges with a flow of 15 646 m3 s−1 (1.6% of the world's combined river flow). Carbon dioxide fluxes averaged over the entire estuary are in the range of −2.78 to 84.4 mmol m−2 d−1. This estuary acts as a sink for CO2 during monsoon months and seasonal variation of its flux is controlled by dilution of seawater by river water. Since the solubility of CO2 and the disassociation of carbonic acid in estuarine water are controlled by temperature and salinity, the observed variations of CO2 fluxes are compared with those predicted from seasonal changes in temperature, salinity and the ratio of gross primary production to community respiration using empirical equations with an explained variability of 55%.

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Article information

DOI
https://doi.org/10.1039/B201614A
Article type
Paper
Submitted
13 Feb 2002
Accepted
20 May 2002
First published
20 Jun 2002

J. Environ. Monit., 2002,4, 549-552

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Seasonal effects on the air–water carbon dioxide exchange in the Hooghly estuary, NE coast of Bay of Bengal, India

S. K. Mukhopadhyay, H. Biswas, T. K. De, S. Sen and T. K. Jana, J. Environ. Monit., 2002, 4, 549 DOI: 10.1039/B201614A

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