气候和土地利用变化对中国北方农牧交错带植被覆盖变化的影响_刘军会



基于1986、2000年中国北方农牧交错带的遥感影像及研究区的气象数据,利用植被覆盖度信息提取模型研究了1986-2000年间研究区植被覆盖度的时空变化,并分析了气候和土地利用变化对植被覆盖度变化的影响.结果表明:1986-2000年,研究区高盖度植被的面积缩减,低盖度植被的面积增加 植被覆盖升高区主要位于该区东北段的东部、北段的西部和西北段的西部,其他地段的植被覆盖明显退化 植被覆盖度与降水、干燥度指数呈正相关,与温度呈负相关 不同土地利用类型的植被覆盖度变化方向和程度各异.

-Climate and land use change on China North Ecotone and vegetation cover the impact of changes _ Liu Jun 1986 will be based on meteorological data and remote sensing images of the study area in 2000 China North Ecotone, the use of vegetation coverage information extraction model 1986- Dynamics in 2000 of vegetation coverage, and to analyze the impact of change on vegetation coverage changes in climate and land use results show: 1986-2000 years, the area of high vegetation coverage area reduction, low vegetation coverage. increase in area　vegetation cover increased mainly in the east, west and north west section of the northern section of the northeast section of the area, other vegetation coverage area significantly degraded　vegetation coverage and precipitation, aridity index was positively correlated with temperature negative correlation　vegetation coverage of different types of land use change in direction and degree varies.