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Natural reduction of CO 2 observed in the pre-monsoon period at the coastal station, Goa

Latha, R and Murthy, BS (2012) Natural reduction of CO 2 observed in the pre-monsoon period at the coastal station, Goa. Meteorology and Atmospheric Physics, 115 (1-2). pp. 73-80.

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Measurements of carbon dioxide (CO 2) concentration were made at a coastal land station, Goa, on the west coast of India from March to June 2003 as part of the ARMEX (ARabian sea Monsoon Experiment) campaign. The observations show a systematic reduction (~120 mg m -3) of CO 2 concentration during the pre-monsoon months, March-May, during which no significant change in anthropogenic emissions takes place. CO 2 shoots up from 520 to 635 mg m -3 in June with the onset of the South West monsoon. Back trajectories show that the source of air mass gradually shifts from the coastal land mass to the open southern Arabian Sea during the pre-monsoon period. The observed reduction in CO 2 is explained in terms of earlier measurements in the Arabian Sea indicating maximum chlorophyll a (Sarupria and Bhargava in J Mar Sci 27:292-297, 1998) and minimum partial pressure of CO 2 (Sarma in J Geophys Res 108:3225, 2003) in the sea waters off the west coast of India during the pre-monsoon period, cleaner marine air mass advection from the open sea, and negligible local vertical CO 2 flux.

Item Type: Article
Additional Information: Copyright of this article belongs to Springer.
Uncontrolled Keywords: advection; air mass; atmospheric chemistry; carbon dioxide; carbon emission; chlorophyll a; concentration (composition); marine atmosphere; monsoon; open ocean; partial pressure; reduction, Arabian Sea; Goa; India; Indian Ocean
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 19 Dec 2013 12:37
Last Modified: 19 Dec 2013 12:37

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