# CO emissions in China: Uncertainties and implications of improved energy efficiency and emission control

 Title: CO emissions in China: Uncertainties and implications of improved energy efficiency and emission control Author: Zhao, Yu; Nielsen, Chris; McElroy, Michael Brendon; Zhang, Lin; Zhang, Jie Note: Order does not necessarily reflect citation order of authors. Citation: Zhao, Yu, Chris P. Nielsen, Michael B. McElroy, Lin Zhang, and Jie Zhang. 2012. “CO Emissions in China: Uncertainties and Implications of Improved Energy Efficiency and Emission Control.” Atmospheric Environment 49 (March): 103–113. doi:10.1016/j.atmosenv.2011.12.015. Access Status: Full text of the requested work is not available in DASH at this time (“dark deposit”). For more information on dark deposits, see our FAQ. Full Text & Related Files: Zhao et al. 1203 Atmos Envt CO Final.pdf (689.5Kb; PDF) Abstract: A bottom-up methodology and an improved database of emission factors combining the latest domestic field measurements are developed to estimate the emissions of anthropogenic CO from China at national and provincial levels. The CO emission factors for major economic sectors declined to varying degrees from 2005 to 2009, attributed to improved energy efficiency and/or emission control regulations. Total national CO emissions are estimated at 173 Tg for 2005 and have been relatively stable for subsequent years, despite fast growth of energy consumption and industrial production. While industry and transportation sources dominated CO emissions in developed eastern and north-central China, residential combustion played a much greater role in the less developed western provinces. The uncertainties of national Chinese CO emissions are quantified using Monte Carlo simulation at 20% to þ45% (95% confidence interval). Due to poor understanding of emission factors and activity levels for combustion of solid fuels, the largest uncertainties are found for emissions from the residential sector. The trends of bottom-up emissions compare reasonably to satellite observation of CO columns and to ground observations of CO2eCO correlation slopes. The increase in the ratio for emissions of CO2 relative to CO suggests that China has successfully improved combustion efficiencies across its economy in recent years, consistent with national policies to improve energy efficiency and to control criteria air pollutants. Published Version: doi:10.1016/j.atmosenv.2011.12.015 Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:34730506 Downloads of this work: