Estimation of air-sea CO2 flux in the coastal waters of Visakhapatnam

Latha, T. Preethi ; Rao, K. H. ; Sarma, V. V. S. S. ; Seetaram, P. ; Choudhury, S. B. ; Nagamani, P. V. ; Dutt, C. B. S. ; Dhadwal, V. K. ; Manna, Sudip (2015) Estimation of air-sea CO2 flux in the coastal waters of Visakhapatnam Journal of the Indian Society of Remote Sensing, 43 (3). pp. 647-652. ISSN 0255-660X

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Observations were conducted in a time series mode off Visakhapatnam in Bay of Bengal, for a period of 10 days from 8 to 19th February 2013 to examine the short-term atmospheric events on chemical processes in the upper 100 m water column. Water column temperature, salinity at 2 h interval from surface to 100 m were collected using CTD whereas water samples were collected for nutrients (phosphate and silicate), Dissolved Inorganic Carbon (DIC), pH, Total Alkalinity (TA) at 4 h interval in the upper 25 m water column. Atmospheric properties such as air temperature, humidity and wind speed were measured in 1 min interval. The winds were normally northeast direction with speed ranged between 0.1 and 8 m/s from 8 to 13th February and decreased to 0.1–4 m/s between 14 and 19th February 2013. The atmospheric pCO2 ranged from 380 to 420 μatm whereas surface water pCO2 ranges from ∼370 to 470 μatm during study period. The low pCO2 levels were associated with low saline water indicating the rich nutrient coastal waters were under saturated with reference to atmosphere. The CO2 flux estimations for this region showed a significant source to the atmospheric CO2 . This study provides information on changes in the physical and chemical processes in relation to the CO2 flux at the air-water interface in the coastal Bay of Bengal.

Item Type:Article
Source:Copyright of this article belongs to Springer.
Keywords:pCO2; pH; TA; CO2 Flux
ID Code:105572
Deposited On:01 Feb 2018 12:13
Last Modified:01 Feb 2018 12:13

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