%0 Journal Article
%T Effects of land uses on carbon emissions and their spatial-temporal patterns in Hunan Province<br>湖南省不同土地利用方式的碳排放效应及时空格局分析
%A ZHAO Xianchao
%A ZHU Xiang
%A ZHOU Yueyun
%A <br>赵先超
%A 朱翔
%A 周跃云
%J 环境科学学报
%D 2013
%I 
%X 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).
%K land use patterns
%K carbon emission
%K spatial-temporal difference
%K Hunan Province<br>土地利用方式
%K 碳排放
%K 时空差异
%K 湖南省
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=03A55E61A8750ACAC6AF81EF9E2AC838&aid=523711B464E4FFDF84613521A37DBA43&yid=FF7AA908D58E97FA&vid=27746BCEEE58E9DC&iid=38B194292C032A66&sid=27A5865B8C0B85C3&eid=BFB3B49B74E638B4&journal_id=0253-2468&journal_name=环境科学学报&referenced_num=0&reference_num=32