Evolution Mechanisms of Industrial CO 2 Emissions and Its Decoupling Analysis in Zhengzhou-Kaifeng Metropolitan Area

The conflict between the great demand of energy in the process of rapid urbanization and industrialization and the CO2-abate pressure under the condition of global warming has become one of the most prominent foci in man-land territorial system.Exploring evolution mechanisms of industrial CO2 emissions in Zhengzhou-Kaifeng metropolitan area and taking appropriate measures are significant for the theoretical and practical development of low-carbon city and low-carbon economy.Sources of CO2 emissions from metropolitan areas are divided into six categories,consisting of agricultural,industrial,commercial and residential energy consumption,as well as construction and transportation energy consumption.Industrial CO2 emissions are further subdivided into 34 kinds of industrial energy consumption.Based on the 2000-2009 Energy consumption data,a CO2 estimation model to account for CO2 emissions in scope 1(only refer to energy combustion) and scope 2 was constructed in this paper.Evolution mechanisms of CO2 emissions between 2000 and 2009 of six units and 34 kinds of industries were also researched by using LMDI methods.The low-carbon types and low-carbon directions of industrial development are analyzed by decoupling the index in Zhengzhou-Kaifeng metropolitan area.The conclusions can be drawn as follows.(1) The changes of CO2 emissions show different sectoral and regional characteristics in various stages,due to the adjustment to CO2 emissions structure.(2) The changes of CO2 emissions took place in the interaction of factors including intensity(technical) effects,structural effects and scale effects of economies.The main reasons for CO2 emissions increase are the rapid growth of economies of scale and the exogenous pattern of economic development by inputting factors.The residential sector has less contribution than production sectors to CO2 emissions,while the gap is gradually narrowing.(3) The decoupling between CO2 emissions and the economic development determines the direction and the degree of industrial restructuring and upgrading.(4) Further studies should be conducted on the contribution of industrial restructuring to CO2emissions and the degree of decoupling.