安徽省会经济圈碳排放强度与生态补偿研究

通过对1997年和2007年碳排放强度分析,揭示安徽省会经济圈内各市县对碳排放的影响和区域差异,根据相关固碳价格计算省会经济圈市县的生态补偿标准。研究结果显示:(1)省会经济圈总体上为碳汇区,1997—2007年间碳排放总量增加1 049.9万t,年均增长14.4%,其中,合肥市碳排放量增长最大。(2)2007年经济圈内地均建设用地碳排放强度和地均碳排放强度分别增加为1997年的2.18,2.41倍。1997—2007年,省会经济圈内的碳排放量、地均碳排放强度和地均建设用地碳排放都呈现合肥市>巢湖市>六安市。(3)经济圈内各县市地均碳排放强度差异显著,建设用地平均碳排放强度以合肥市最高(784 t/hm2),其次是霍山县和金寨县,其他区域的建设用地平均碳排放强度相差不大。(4)2007年合肥市提供的生态补偿标准是12.8～105.1亿元,六安市和巢湖市得到的生态补偿标准范围分别为31.9～278.1,0.6～13.8亿元;各县市生态补偿差异也很大。

Intensity of Carbon Emissions and Ecological Compensation in the City Ecology Circle in Anhui Province

In order to analyze the effects of human activities on carbon emissions and spatial distributions in the provincial city ecology circle,the authors utilized data of land use types such as cultivated land,woodland,grassland and land for construction in 1997 and 2007 to calculate carbon emissions and the compensation standard based on price of fixation carbon dioxide.Carbon emissions greatly varied over different land use types,in which the land for construction and cultivated land were considered two major carbon sources.Woodland and grassland were two major carbon sinks.The result s shows:(1) carbon emissions were found to increase by 14.4% over the entire the provincial city ecology circle from 1997 to 2007.With the more impacts of human activities,Carbon emission from land for construction increased from 745.87 million tons in 1997 to 1794.09 million tons in 2007.However,carbon sink maintained generally stable during this period.(2)Two indexes describing carbon emissions,i.e.,carbon emission per unit area of land and carbon emission per unit area of construction land,were proposed.These two indexes could better reflect carbon emission intensity from 1997 to 2007 and the differences among the regions.Compared with carbon emission intensity in 1997,the two indexes increased 2.18 times and 2.41 times in 2007,respectively.Carbon emissions peaked in the Hefei City,and showed a relatively higher level in Chaohu City and a low level in Lu an City,and the index of carbon emission per unit area of land and construction land indicated the same changing trend.(3) The land for construction was the largest carbon source,and the carbon emission per hm2 was increasing from 1996 to 2007.Carbon emission per hm2 of land and construction land was markedly different in 15 cities or counties.(4) On the basis of carbon emission and price of fixation carbon dioxide over the provincial city ecology circle during the period 1997—2007,the value of the standard for ecological compensation in three cities was estimated.