Disclaimer: This material is being kept online for historical purposes. Though accurate at the time of publication, it is no longer being updated. The page may contain broken links or outdated information, and parts may not function in current web browsers. Visit https://espo.nasa.gov for information about our current projects.


Ozone Monitoring Instrument Observations of Interannual Increases in SO2...

Lu, Z., D. Streets, B. de Foy, and N. Krotkov (2013), Ozone Monitoring Instrument Observations of Interannual Increases in SO2 Emissions from Indian Coal-Fired Power Plants during 2005− 2012, Environ. Sci. Technol., 47, 13993-14000, doi:10.1021/es4039648.

Due to the rapid growth of electricity demand and the absence of regulations, sulfur dioxide (SO2) emissions from coal-fired power plants in India have increased notably in the past decade. In this study, we present the first interannual comparison of SO2 emissions and the satellite SO2 observations from the Ozone Monitoring Instrument (OMI) for Indian coal-fired power plants during the OMI era of 2005− 2012. A detailed unit-based inventory is developed for the Indian coalfired power sector, and results show that its SO2 emissions increased dramatically by 71% during 2005−2012. Using the oversampling technique, yearly high-resolution OMI maps for the whole domain of India are created, and they reveal a continuous increase in SO2 columns over India. Power plant regions with annual SO2 emissions greater than 50 Gg year−1 produce statistically significant OMI signals, and a high correlation (R = 0.93) is found between SO2 emissions and OMI-observed SO2 burdens. Contrary to the decreasing trend of national mean SO2 concentrations reported by the Indian Government, both the total OMI-observed SO2 and annual average SO2 concentrations in coal-fired power plant regions increased by >60% during 2005−2012, implying the air quality monitoring network needs to be optimized to reflect the true SO2 situation in India.

PDF of Publication: 
Download from publisher's website.