摘要
利用量化统计方法对长沙市芙蓉区、天心区、岳麓区、开福区、雨花区、望城区现阶段人类呼吸作用和化石燃料产生的碳排放与植被碳吸收量进行比较,探讨各区碳吸收率的差异性。结果表明,雨花区的碳排放最大,占全市的24.77%;而芙蓉区和天心区碳吸收率最小,分别只有1.87%和12.08%。相对而言,望城区和岳麓区的碳平衡保持最好。全市碳吸收率仅为48.16%。若要达到市区整体的碳收支平衡,还需增加84297.32 hm2林地以吸收多余的二氧化碳。按长沙市经济发展规划,2020年要维持目前48.16%的碳吸收率,在绿地结构不变的前提下,必须要增加更多绿地面积,全市绿地覆盖率需达到94.99%以上。这就需要对植被结构进行优化,并降低能耗,增加绿化率至60%,并在市外预留134099.02 hm2林地吸收多余的二氧化碳。
Using a quantitative statistical method, the carbon emissions from human respiration and fossil fuels and the carbon absorption by vegetation growth were compared among six districts （Furong, Tianxin, Yuelu, Kaifu, Yuhua and Wangcheng） in Changsha City. The results showed that the carbon emission from Yuhua District was the largest among the six districts, accounting for 24.82% of the total carbon emissions. But the carbon absorptions in Furong and Tianxin Districts were the lowest, only accounting for 1.87% and 12.08% of the total carbon absorptions, respectively. In general, the balance of carbon budget was better in Wangcheng and Yuclu than in other districts. In order to keep the balance of carbon budget in Changsha city, 84,297.32 hm~ of more woodland should be planned in the future to assimilate atmospheric CO2. According to the economy development plan of Changsha city and in order to maintain the current carbon absorption rate of 48.15% until 2020, green areas need to be increased to a green coverage of 94.99% in keeping current spatial structure of green areas. Therefore, the vegetation structure needs to be optimized to reduce the energy consumption, to increase the green coverage to 60%, and to reserve 134,099.02 hm^2 of woodland outside the city to assimilate more atmospheric CO2.
出处
《农业现代化研究》
CSCD
北大核心
2014年第5期640-643,共4页
Research of Agricultural Modernization
基金
国家自然科学基金(41271302)
湖南省教育厅重点项目(12A083)
湖南省国土资源厅项目(2013-23)
关键词
碳收支平衡
空间差异
城区
长沙
balance of carbon budget
spatial difference
urban district
Changsha
