研究报告
赵先超,朱翔,周跃云.湖南省不同土地利用方式的碳排放效应及时空格局分析[J].环境科学学报,2013,33(3):941-949
湖南省不同土地利用方式的碳排放效应及时空格局分析
- Effects of land uses on carbon emissions and their spatial-temporal patterns in Hunan Province
- 基金项目：湖南省研究生科研创新项目(No.CX2012B209);湖南省国际经济与国际工程管理研究中心开放基金(No.12IEPM03);湖南工业大学自然科学研究项目(No.2013HZX13)
- 作者
- 单位
- 赵先超
- 1. 湖南师范大学 资源与环境科学学院,长沙 410081;
2. 湖南工业大学 低碳城市研究所,株洲 412007
- 朱翔
- 湖南师范大学 资源与环境科学学院,长沙 410081
- 周跃云
- 湖南工业大学 低碳城市研究所,株洲 412007
- 摘要：土地利用变化是造成碳排放量增长的主要原因.运用相关统计数据,测算并分析了湖南省不同土地利用方式的碳排放效应及时空差异.结果表明,2003—2009年,湖南省净碳排放量呈增加趋势,年均增加478.15万t,而单位GDP碳排放强度却呈下降趋势,且与人均GDP呈现出倒U型曲线关系,曲线拐点在人均GDP达到0.97～1.00万元·人-1附近.同期,湖南省建设用地和耕地成为主要的碳源,其中,建设用地碳排放量年均增加约483.19万t,对净碳排放量的年均贡献率超过84%;林地为主要碳汇,其碳汇量年均可达769.67万t.2009年,湖南省净碳排放量存在着明显的区域差异,总体上呈现从东到西、从北到南逐渐减小的趋势,其中,娄底、岳阳、湘潭与郴州4市属于高排放-低效率(HE-LE)类型;永州、怀化、吉首与张家界4市属于低排放-高效率(LE-HE)类型;邵阳、长沙、常德、株洲、衡阳与益阳6市属于中排放-中效率(ME-ME)类型.
- Abstract：Changes in land use are the main cause of carbon emission increases. According to the relevant statistical data, we measured and analyzed the effects of land uses on carbon emissions and their spatial-temporal patterns in Hunan province. The results showed that the net carbon emission had an increasing trend with the average speed of 478.15×104 t·a-1 from 2003 to 2009. The carbon intensity had a declining trend. A reversed "U" shape curve between carbon intensity and per capita GDP was found. The knee point of reversed "U" shape curve was associated with per capital GDP of 9.7 to 10 thousand yuan. The construction land and cultivated land were the main carbon sources. The carbon emission by construction land had been increasing by 483.19×104 t·a-1, contributing to over 84% of the net carbon emission. The forest land was the main carbon sink and its absorption was 769.97×104 t·a-1 averagely. There were obvious differences in net carbon emission in 2009, with a gradually reducing trend from east to west and from north to south. Loudi, Yueyang, Xiangtan and Chenzhou were the type of HE-LE (High emission-Low efficiency) while Yongzhou, Huaihua, Jishou and Zhangjiajie were LE-HE (Low emission-High efficiency). Shaoyang, Changsha, Changde, Zhuzhou, Hengyang and Yiyang were the type of ME-ME (Middle emission-Middle efficiency).
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