Record Details

Air – water carbon dioxide exchange dynamics along the outer estuarine transition zone of Sundarban, northern Bay of Bengal, India

NOPR - NISCAIR Online Periodicals Repository

View Archive Info
 
 
Field Value
 
Title Air – water carbon dioxide exchange dynamics along the outer estuarine transition zone of Sundarban, northern Bay of Bengal, India
 
Creator Akhand, Anirban
Chanda, Abhra
Dutta, Sachinandan
Hazra, Sugata
 
Subject Isobath
Greenhouse Gas
Nutrient
Mangrove
Sink
Atmosphere
 
Description 111-116
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.
 
Date 2012-04-03T09:53:00Z
2012-04-03T09:53:00Z
2012-04
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/13763
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.41(2) [April 2012]