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以科尔沁沙地阿古拉苏木为典型代表区域,应用1987-2006年20a间12幅遥感影像及相应气候数据,分析了地表环境变化与气候变化间的响应关系,提出了表征响应敏感程度、影响程度大小排序的气候因子影响指数(CFII).结果表明:近20a研究区地表环境变化表现为不断恶化的趋势.各类地表环境变化与气候因子变化间有着良好的响应关系,各类气候因子变化以不同方式和过程不同程度地影响着地表环境的变化.响应敏感度最大,即对地表环境变化影响最大的是相对湿度,其次为降水量和蒸发量.水分条件是制约干旱半干旱地区地表环境变化的主导因素.
Based on 12 remote sensing images and corresponding climatic data from 1987 to 2006 in the area of Horqin sandy land, this paper analyzed the relationship between the change of the surface environment and the climate change, and proposed the method of characterizing the response sensitivity and influence (CFII). The results show that the surface environmental changes in the past 20 years show a deteriorating trend.The response of various types of surface and climate factors has a good response, the changes of various climatic factors The changes of the surface environment are affected by different ways and processes to varying degrees.The relative humidity is the most sensitive to the change of the surface environment, followed by the precipitation and the evaporation.Water conditions are the key factors restricting the surface environment in arid and semiarid regions The dominant factor of change.