Abstract:

Global climate change caused by carbon emissions has brought adverse impacts to the human society and economic development,which now becomes a major issue in world political,economic and scientific fields.Reducing carbon emission has become a international topic.China has set the target to reduce emission of greenhouse gases by 40%~45% in 2020 compared with 2005,which makes China face the dilemma between economic developments and carbon emission.It is urgent to establish a standard and unified carbon accounting system to evaluate carbon reduction potentials and to compare carbon emission levels among various cities.This study established a cityscale carbon accounting system based on IPCC list of carbon emission,including 4 departments and 27 kinds of mainly carbon sources.The 4 departments are energy consumption,industrial processes,land use patterns and waste.According to the IPCC list,this paper calculated the carbon emission and carbon emission intensity of Wuhan Urban Circle systematically during 2001-2009.The results show that during 2001-2009 the department that contributed the largest amount of carbon emission was the waste,with 84 892.76 ton of CO2 emission,followed by the energy department,with 36 32513 ton of CO2 emission,and then followed by the industrial department,with 15 11746 ton of CO2 emission.The smallest amount of carbon emission came from the land use department,with 1 44514 ton of CO2 emission.Whats more,the CO2 emission from industrial department grew rapidly.Cities with relatively higher carbon emission were Wuhan,Huangshi,Xiaogan,Huanggang.The annual increasing rate of the total carbon emission,geographical intensity of carbon emission,economic intensity of carbon emission were 186%,022% and -606% respectively.After all the factors which could affect the carbon emission were decomposed by reasonable conversion of Logarithmic Mean Divisia Index Model,the results showed that factors of energy efficiency and energy structure could restrain carbon emission,with 22880 million tons and 5173 million tons respectively from the year 2002-2009.In contrast,the economy development and labor scale increased the carbon emission,with 14258 million tons and 5823 million tons in total.Based on the present situation of Wuhan Urban Circle,it is necessary to give different policies regarding the regional characteristics to reduce CO2 emissions.The advices on carbon emissionreduced were put forward as following.(1) For Wuhan Urban Circle,industrial and energy structure should be improved,services and manufactures that consume lower energy should be given the priority to develop. Whats more,advanced technologies as well as machines should be introduced into farmland to reduce its CO2 emission.(2) Technology levels should be promoted to raise the energy efficiency,clean energy should be introduced to decrease the proportion of coal.In order to reduce the CO2 from the waste department,various measures on the dispose of waste should be used to improve the recycling rate of waste.(3) Carbon emission trading should be highly encouraged by the government.(4) Ecological compensation system should be established to increase the farmers enthusiasm of carbon emissionreduced production