TROPICAL GEOGRAPHY ›› 2015, Vol. 35 ›› Issue (6): 785-796.doi: 10.13284/j.cnki.rddl.002787

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Calculation of CO2 Emission Embodied in City Trade: A Case Study of Shanghai

ZHONG Zhangqi1,SUN Yi2,LIU Xiao3,WANG Zheng1,2   

  1. (1.Key Laboratory of Geographic Information Science,East China Normal University,Ministry of Education,Shanghai 200241,China;2.Institute of Policy and Management,Chinese Academy of Sciences,Beijing 100080,China; 3.Hunan Academy of Social Sciences,Changsha 410003,China)
  • Online:2015-11-05 Published:2015-11-05

Abstract:

In order to provide an important theoretical basis for proper policymaking to allocate the responsibility for CO2 emission reduction at the city scale and make targeted reduction policy for urban economy, Shanghai city was used as a representative case to calculate the embodiment of local CO2 emission based on the Chinese MRIO tables of 2007. Two CO2 emission accounting approaches (production accounting principle and consumption accounting principle) were also applied, and the sources and flows of the embodied CO2 emission in domestic import by and export from Shanghai in 2007 were discussed. One finding from this study was that Shanghai’s CO2 emission embodied in domestic trade was 82.60 million tons, which accounted for approximately 50.67% of Shanghai’s CO2 emission in 2007. The lower limit and the upper limit of Shanghai’s CO2 emission embodied in international trade were 48.97 and 26.52 million tons, which accounted for approximately 30.04% and 16.27% of Shanghai’s CO2 emission in 2007, respectively. Moreover, the difference between the lower limit and the upper limit of Shanghai’s EEI was very large, indicating that Shanghai had a great potential in realizing energy-saving and emission reduction. In addition, Embodied CO2 emission in total output and final consumption differed widely between the 30 industrial sectors in Shanghai. Notably, the higher the net output of CO2 emission embodied in various sectors in international trade was, the less obviously Shanghai’s CO2 emission was affected by a production-based approach. Another important finding was that the top five contributors in terms of CO2 emission embodied in domestic import by Shanghai were Hebei, Zhejiang, Hubei, Jiangsu and Henan. Additionally, further calculation suggested that the CO2 emission embodied in domestic import by Shanghai from these five regions accounted for approximately 45.74% of the total and 17.05% of Shanghai’s CO2 emission respectively, suggesting that these regions provided a strong support for Shanghai’ economic growth through trade. The top five receivers in terms of CO2 emission embodied in domestic export from Shanghai were Zhejiang, Guangdong, Jiangsu, Hebei and Anhui. Additionally, further calculation suggested that the CO2 emission embodied in exports from Shanghai in domestic trade to these five regions made up 50.04% of the total and 6.71% of Shanghai’s CO2 emission in 2007, respectively, suggesting that the impact of CO2 emission embodied in export trade from Shanghai on these regions’ responsibilities for CO2 emission reduction may be greater than on the other regions of China.

Key words: input-output analysis, CO2 emission reduction, emission embodied in trade, Shanghai