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《Resources Science》 2010-11
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Tracking Analysis of Carbon Footprint Flow of China's Industrial Sectors

CAO Shuyan 1,2 XIE Gaodi 2 (1.Beijing Institute of Petrochemical Technology,Beijing 102617,China;2 .Institute of Geographical Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China)  
Rapidly increasing carbon footprint has been a significant challenge for China to experience a stage of ecological deficits and thus an urgent need for management of carbon emissions emerges.Effective carbon management strategies should therefore be developed on the basis of total carbon footprint.Formulation of such strategies should account for all carbon from energy that directly and indirectly support the final demand in a defined economy.In the present study,the authors introduced an input-output methodology to calculate and track the carbon footprint(CF)flow into and out of China's 52 industrial sectors in the year 2007.It was concluded that the China's industrial sectors had the total CF of 7.10 billion tCO2(metric tons of CO2)in 2007,in which 5.25 billion tCO2 was in direct form and 1.85 billion tCO2 in indirect form generated by direct and indirect energy use,respectively.Of the total CF,4.70 billion tCO2 was responsible for supplying domestic final consumption and 2.70 billion tCO2 for supporting exported goods and services.China was in CF trade deficit(i.e.,more CF embodied in exported goods and services than those in imported ones)of 0.55 billion tCO2 through international trade,taking up approximately 10.5%of the direct carbon footprint of China's production.It was also found that the CF flow was highly active in China's domestic industrial sectors,and 82.3% of the overall total CF was redistributed.Two groups of industrial sectors,marked by Group B1 and B2,were most active in carbon flow,and they were thus taken as the key target sectors from the perspective of carbon management.Group B1 was characterized by large magnitude of indirect carbon footprint and carbon trade surplus,while Group B2 was characterized by a carbon trade deficit and large amount of carbon footprint generated by direct energy use but with only a small portion used to support the final consumption of a sector per se in this group.In 2007,the sectors in Group B1 had an indirect to direct CF ratio of 12.6,and were consequently in CF trade surplus with net importing 3.19 billion tCO2 from other sectors.The sectors in Group B2 ranked top 10 in term of CF generated by direct energy use and had a total of 3.95 billion tCO2,of which 89.9%was transferred to other sectors.As for CF essence,sectors in Group B1 were substantially high in CF.As such, their CF management should center on promotion of the‘dematerialization'process.In Group B2, one half of the sectors were apparently high in CF,with implementing CF management centered on improvement of energy efficiency;the other half of the sectors were both substantially and apparently high in CF.Their CF management should therefore place emphasis on the equilibrium between dematerialization and energy saving.
【Fund】: 国家科技支撑计划项目(编号:2006BAC18B01);; 国家重点基础研究发展计划项目(编号:2009CB421106);; 国家自然科学基金资助项目(编号:30770410);; 北京市属高等学校人才强教深化计划项目(编号:PHR201008358)
【CateGory Index】: X2
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