Mopitt Carbon Monoxide Satellite Observations over India during 2005−2015: Its Source Distributions, Transport Pathways, and Interannual Variability

India leads the high levels of air pollution in the natural environment due to rapid industrial and economic development. The major source contributes to CO in India is biomass burning and vehicular emission. Measurement of Pollution in the Troposphere (MOPITT) carbon monoxide (CO) data during 2005-2015 to examine its source distributions, transport pathways and interannual variability over India. It observed that during winter months CO emissions over eastern part of Bihar, west Bengal and Northern Indo Gangetic (IG) plain is much higher as compared to summer months. The increased vehicular emission and industrial activities after 2010 leads the enhancement of CO in the same region. CO above 300 ppbv during winter season shows large seasonality in the lower troposphere while it observed as low as 100 ppbv during monsoon season.CO mixing ratios values lowered by 60-80 ppbv during Indian summer monsoon and increased approximately 100 ppbv during Nov-May strongly exhibits anticyclonic activities over Arabian Sea. Deep convective activities transported maximum CO pollutants up to 200 ppbv over northern and eastern part of India during monsoon season.