JOURNAL OF NATURAL RESOURCES ›› 2010, Vol. 25 ›› Issue (11): 1875-1886.

• Resources Ecology •

### Carbon Emission Efficiency and Low Carbon Optimization of Land Use: Based on the Perspective of Energy Consumption

YOU He-yuan, WU Ci-fang

1. Institute of Land Science and Property Management, Zhejiang University, Hangzhou 310029, China
• Received:2010-04-29 Revised:2010-06-13 Online:2010-11-20 Published:2010-11-20

Abstract: Carbon emission efficiency is payid more attention to the effect of carbon emission which is considered as cost on desired output, but some indicators, such as total carbon emission and carbon emission per unit land area, neglect this effect. In this paper, the key consideration of carbon emission is the carbon emission brought by energy which is consumed in land use. Based on the input-oriented model of CCR and BCC, the carbon emission efficiency of land use that is composed of the total efficiency, technical efficiency, scale efficiency and returns to scale is calculated. The computed results indicate that: 1) the total efficiencies of carbon emission in Inner Mongolia, Fujian, Guangxi and Qinghai were 1.0000, and they were DEA efficient among the 30 provinces(not including Tibet, Hong Kong, Macao and Taiwan due to no data). The total efficiency of carbon emission in Shanghai was 0.0469, and it was the least among the 30 provinces. The total efficiency of carbon emission in the other provinces was from 0.0682 to 0.8965. 2) There was a relationship between the features of land use and the distribution of technical efficiency and scale efficiency, the efficiency value of carbon emission was also affected by the features of land use. The distribution of regions whose scale efficiencies were efficient, was smaller than the distribution of regions whose technical efficiencies were efficient. 3) The provinces whose scale efficiencies were efficient, different from the provinces with constant returns to scale. Therefore, the returns to scale of the provinces should be taken into account if the scale efficiency of carbon emission efficiency of land use is wanted to improve. In order to insure DEA efficiency of carbon emission of land use in all provinces, the inputs optimization and outputs optimization of land use in 26 provinces which are not DEA efficient are designed. The optimization based on the perspective of low carbon also calculates the input redundancy and output shortage. Finally, according to the results of low carbon optimization, measures are taken to make land use low carbon emission. The measures are composed of the energy input control in land use and land output optimization based on optimal allocation of land resource. Carbon emission efficiency of land use can achieve DEA efficiency if these measures are implemented.

CLC Number:

• F301.24