摘要
土地利用变化是影响陆地生态系统碳储量变化的重要驱动因素。利用1980、1990和2005年三期遥感影像解译并提取了环太湖地区1980-2005年的土地利用变化数据,根据《IPCC2006年国家温室气体排放清单指南》提供的方法,计算了环太湖地区土地利用变化对生态系统中植被碳储量的影响,并将计算结果与国内相关研究进行了对比分析。主要结论如下：①1980-1990年耕地、林地及草地分别净减少了223.26、1182.50和178.90 km^2,其中耕地主要转出为林地与建设用地,转入来源为林地、草地及未利用地,草地主要转出为耕地、林地及建设用地,其他地类之间转化较小;1990-2005年耕地及林地净减少了5929.51、1381.94 km^2,草地面积则增加了1270.47 km^2,其中耕地、林地转出涉及所有地类,耕地转入来源则主要是水域、林地及未利用地,林地转入主要是耕地、草地等,草地转入则涉及所有地类。②IPCC方法计算1980-1990年土地利用变化导致植被碳储量净减少642171.27 Mg,1990-2005年植被碳储量净减少了683125.18 Mg。③通过对比发现,IPCC方法计算结果与国内相关研究在植被碳储量变化趋势上基本一致,但存在一定的数值误差,建议研究编制适合国情的中国温室气体排放清单指南。
Land use/cover change is the main driving factor for the change of ecosystem carbon storage.To understand and appraise the carbon source/sink function of terrestrial ecosystem accurately,it needs to evaluate the impact of land use changes on carbon storage firstly.Based on data from remote sensing TM imageries in 1980,1990 and 2005 in the region around Taihu Lake in China,the process of land use/cover change relevant to cropland,forest land,wetlands,grassland,settlements and other land have been explained,then the conversion matrix of land use change have been analyzed by GIS technology.Based on the above analysis,the paper calculates the change value of vegetation carbon storage in this study area which caused by land use change with the method supplied by the 2006 IPCC Guidelines for National Greenhouse Gas Inventories.The main results are as follows：（1） The area of cropland,forestland and grassland decreased by 223.26 km^2,1182.50 km^2 and 178.90 km^2 during 1980-1990,and the cropland was converted to forest land and settlements mainly,the land types converted to cropland include forest land,grassland and other land,among which 1463.90 km^2 of forest land were converted to cropland.The area of grassland increased by 1270.47 km^2,adversely,the cropland and forest land decreased by 5929.51 km2 and 1381.94 km^2 during 1990-2005,and the cropland conversion includes wetlands,forest land,grassland,settlements and other land,with only 59.95% of the original cropland remaining unchanged.（2） The vegetation carbon storage decreased by 642171.27 Mg because of land use change during 1980-1990,and the forest land conversion to cropland has caused a decrease of 775867 Mg in vegetation carbon storage,that from cropland to forest land caused an increase of 113261.43 Mg,that from grassland to cropland caused an increase of 8129.36 Mg,and that from grassland to forest land caused an increase of 12304.94 Mg.The vegetation carbon storage decreased by 683125.18 Mg during 1990-2005,and the conversion from forest land to c
出处
《自然资源学报》
CSCD
北大核心
2009年第8期1343-1353,共11页
Journal of Natural Resources
基金
国土资源部公益性行业科研专项经费项目"土地利用规划的碳排放效应与调控研究"(200811033)
江苏省国土资源厅重点科技项目"江苏省环太湖地区国土资源承载力及调控措施研究"
关键词
土地利用变化
生态系统
植被碳储量
环太湖地区
land use change
ecosystem
vegetation carbon storage
the region around Taihu Lake
