Spatial distribution of atmospheric carbon monoxide over Bay of Bengal and Arabian Sea: Measurements during pre-monsoon period of 2006

Indian Space Research Organization (ISRO) conducted the ‘Integrated Campaign for Aerosols, gases and Radiation Budget (ICARB)’ for a two-month pre-monsoon period in 2006 with the ocean segment covering Bay of Bengal and Arabian Sea. During this campaign, carbon monoxide (CO) was continuously monitor...

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Bibliographic Details
Published in:Journal of Earth System Science 2008-08, Vol.117 (4), p.449-455
Main Authors: Aneesh, V. R., Mohankumar, G., Sampath, S.
Format: Article
Language:English
Subjects:
Air quality
Air-sea interaction
Atmosphere
Carbon monoxide
Carbon monoxide measurements
Diurnal
Earth and Environmental Science
Earth Sciences
Earth, ocean, space
Exact sciences and technology
Gases
Greenhouse gases
Indian space program
Marine
Meteorology
Monsoons
Ocean-atmosphere interaction
Oceanography
Oceans
Radiation budget
Space Exploration and Astronautics
Space research
Space Sciences (including Extraterrestrial Physics
Spatial distribution
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Summary:Indian Space Research Organization (ISRO) conducted the ‘Integrated Campaign for Aerosols, gases and Radiation Budget (ICARB)’ for a two-month pre-monsoon period in 2006 with the ocean segment covering Bay of Bengal and Arabian Sea. During this campaign, carbon monoxide (CO) was continuously monitored using a non-dispersive IR analyser. Quantifying CO in ambient air is vital in determining the air quality of a region. Being toxic, CO is a criteria pollutant, but it is a weak green house gas. Globally, very few measurements exist over marine atmospheres to study its temporal pattern; particularly in situ CO measurements are few over the Bay of Bengal and Arabian Sea for comparison. Present measurements indicate: (i) predominant single peak in the diurnal pattern of CO over the marine atmosphere in contrast to the double peak over the continent, (ii) the mean diurnal CO over the marine atmosphere showing an increasing trend towards evening hours, (iii) the amplitude of the AN peaks over the marine atmosphere was ∼ 100 ppbv, while at a remote island site in the Indian Ocean it was ∼ 5 ppbv and (iv) high CO values were observed close to continent and the long range transport by wind also caused CO highs.
ISSN:0253-4126
2347-4327
0973-774X
DOI:10.1007/s12040-008-0044-8