基于土地利用和气候变化的北方农牧交错带界线变迁

Spatial changes of boundary based on land use and climate change in the farming-pastoral ecotone of northern China

基于1961～2005年中国北方9省、自治区的218个气象站点的气象资料及1986年和2000年的土地利用数据,从全球气候变化和土地利用变化角度分别界定了北方农牧交错带的地理位置,并分析了其界线变迁特征.结果表明,北方农牧交错带的地理位置还存在一定争议.交错带整体上已向西北移动.西北界已向北深入到纯牧区,东南界附近也由农牧交错区转成纯农区.气候界线向东南变迁,土地利用界线向西北变迁,两者变迁方向相反.东北段和华北段的界线变迁幅度远大于西北段.

Based on meteorological data of 218 weather stations during 1961-2005 and land use data of 1986 and 2000 in nine provinces of northern China, the location of fanning-pastoral ecotone of northern China from the perspective of global climate change and land use change were redefined, and the change characteristics of its boundary was analyzed. There was some disputes on the location of farming-pastoral ecotone of northern China. The whole farming-pastoral ecotone of northern China moved northwestwards＇. The northwest boundary had gone deep into the pure pasture zone in a northward direction, and fanning-pastoral ecotone near southeast boundary had changed to pure fanning zone. Climatic boundary changed southeastwards while land use boundary changed northwestwards, and their changing directions were reverse. The change ranges of boundary in northeast section and North China section were far greater than northwest section.