湖北省土地利用碳排放总量及其效率

目的]分析区域碳排放总量及效率的变化特征,为全面把握研究区域经济发展质量,进一步提升资源利用效率提供理论依据。方法]基于IPCC碳排放清单,运用DEA和Malmquist指数模型对湖北省2001—2011年土地利用碳排放效率进行分析。结果](1)湖北省土地利用碳排放在研究时序内年均增长9.3%,增速低于GDP增速(14.13%),建设用地是土地利用碳排放的主要来源;(2)土地利用碳排放效率均值为0.803 6年,2006年前后效率呈现下降和上升的特征,效率变化与农业政策优惠、金融危机等外部因素互动特征显著;(3)研究时序内土地利用碳排放全要素效率年均提高24.64%,效率提升主要来自于技术进步,综合技术效率变化对效率提升主要起负面作用。结论]湖北省土地利用碳排放总量持续增加,土地利用碳排放效率不足,土地利用碳排放全要素效率指数稳中有升。湖北省应着眼于调结构,控产能,在依托技术进步提升效率的同时,更加注重经济系统运行效率的提升。

Carbon Emission from Land Use and Its Efficiency in Hubei Province

Objective] The regional carbon emission and the associated efficiency were analyzed in order to comprehensively grasp the development trend of regional economic quality and to give some hints to improve resource utilization efficiency. Methods] Based on the IPCC carbon listing, DEA and Malmquist index models were used to analyze the carbon efficiency of land use in Hubei Province in 2001-2011. Results] (1) Carbon emission from land use in Hubei Province had an averaged annual growth rate of 9.3%, which was lower than the rate of GDP(14.13%).A large part of emission was sourced from construction land. (2) The annual efficiency of carbon emission from land use was 0.803 6, it experienced a decline-to-rise fluctuation around 2006. The fluctuation was impelled by the agricultural preferential policy, the financial crisis and other external factors. (3) The total factor efficiency of carbon emission from land use grew yearly by 24.64%, which can mainly be attributed to the technological progress, whereas, the change of comprehensive technical efficiency had a negative effect on efficiency improvement. Conclusion] The total carbon emission from land use in Hubei Province was observed with a rising tendency and low efficiency. Meanwhile, the total factor efficiency index of carbon emission from land use also got steady rise. We proposed that adjustment of economy structure, ceiling control of productivity should be paid more attention to improve the efficiency of carbon emission by technical progress, and to make the economic system run efficiently.