Please use this identifier to cite or link to this item:
|Title:||Air – water carbon dioxide exchange dynamics along the outer estuarine transition zone of Sundarban, northern Bay of Bengal, India|
|Abstract:||Air-water CO2 flux was measured from the gradient of fCO2 (water) and fCO2 (air) in the Hooghly-Matla estuary to offshore transition zone. An average gas transfer velocity of 10.2 cm h-1 was evaluated in this region. fCO2 (air) ranged between 275.08 µatm to 459.07 µatm and fCO2 (water) varied from 149.1 µatm to 299.2 µatm. Wind velocity and bathymetry (depth) were observed to be the main controlling factors for exchange of CO2 between the atmosphere and water phase. Seawater is found to have a greater influence at the marine end of the estuary. Apart from physical mixing in this freshwater-sea water interacting zone, the study of fCO2 and pH reflects a possible influence of biological activity as well. A maximum efflux rate of 24.56 µmol m-2 h-1 and influx rate of -41.61 µmol m-2 h-1 is determined during high wind velocity. The overall region surveyed was found to behave as a sink during the study period with an average (daytime) influx rate of -14.03 µmol m-2 h-1.|
|ISSN:||0975-1033 (Online); 0379-5136 (Print)|
|Appears in Collections:||IJMS Vol.41(2) [April 2012]|
Items in NOPR are protected by copyright, with all rights reserved, unless otherwise indicated.