Analysis Of CO₂ Emission Changes In China's Transportation Sector Affected By Driving Factors Base On SDA Model

As a typical service sector,CO₂ emissions in the transportation sector are impacted directly or indirectly by other sectors.However,most previous studies on the influencing factors of transportation CO₂ emissions have ignored the interactions between the transportation sector and other sectors.Based on input-output structural decomposition approach?I-O SDA?,the present paper analyzes seven driving factors which contribute to CO₂ emission changes generated from China's transportation sector during 1992-2012.Such as emission factor effect,energy structure effect,energy intensity effect,import substitution effect,export extension effect,intermediate use effect and domestic final demand effect.Then further to analyze the indirect CO₂ emissions caused by the transportation sector,which is to analyze the carbon dioxide emission of the transportation sector caused by the various departments based on the intermediate use effect.The following conclusions are obtained through analysis:1)Based on the analysis of the driving factors,the total output and the energy intensity are found to be the primary positive and negative factor respectively for the transportation CO₂ emissions.2)From the sector analysis,top five sectors causing the increase of the transportation CO₂emissions in 2007-2012 are identified,and three sectors significantly changing the transportation CO₂ emissions are found to be construction sector,sector of information transmission,computer services and software,and sector of wholesale and retail trades.As a view to suppress CO₂ emission growth,besides the promotion of public transportation and new energy technologies,the policymakers should pay attention to the unnecessary transportation generated by the high-emission sectors.