关键词: 能源消费, 土地利用, 碳排放, 碳足迹, 江苏省

Abstract:

The impact of anthropogenic activities on carbon cycle is fulfilled through land use change. It is helpful to study the impacts of land use change on carbon cycle through linking carbon emissions to different land use types. By using data of energy consumption and land use of Jiangsu province from 2003 to 2007, this paper estimated carbon emission by energy consumption through carbon emission model, and analyzed the carbon emission and carbon footprint of different land use types through linking carbon emission to different land use types. The conclusions can be drawn as follows.(1) Total carbon emission from energy consumption of Jiangsu province increased from 8792.24×10⁴ t (2003) to 16329.85×10⁴ t (2007) with an annual rate of 86%, of which carbon emission from terminal fossil energy use accounted for 53.6%. Because carbon emission from fossil energy use was the main reason for the increase of total carbon emission, developing clean energy and improving energy efficiency are the key methods to decreasing total carbon emission. (2) Per unit area carbon emission of Jiangsu increased from 8.24 t/hm² (2003) to 15.53 t/hm² (2007) with an annual rate of 88.5%, of which per unit area carbon emission from residential and industrial areas was the highest (95.62 t/hm²), indicating that dwelling districts and industrial parks were the regions that contributed carbon emission mostly. So, improving energy structure and improving energy efficiency of the above regions was crucial in carbon emission reduction. (3) Carbon footprint of energy consumption was greater than the area of ecological productive land, and the ecological deficit was 1351.28×10⁴ hm² in Jiangsu in 2007. It is indicated that the carbon absorption of terrestrial ecosystems of Jiangsu Province cannot compensate the carbon emission of energy use. So strengthening environmental protection and enhancing carbon sequestration rate could effectively decrease the carbon emission intensity. (4) The descending order of carbon footprint of different land use types was: residential and industrial area, transportation area, unused land and special use area, agricultural land and water conservancy area. So, adjusting the land use pattern and introducing carbon footprint and carbon emission reduction into land use planning is one of the effective methods to reduce regional carbon footprint. (5) Per unit area carbon footprint of Jiangsu increased from 0.938 hm²/hm² (2003) to 1.769 hm²/hm² (2007), which indicates that the carbon footprint of land use had been expanded since 2003.

Key words: energy consumption, land use, carbon emission, carbon footprint, Jiangsu Province