摘要
利用卫星遥感数据 ,以局域植被物候现象分析为基础 ,开展大尺度植被分布的宏观特征研究 ,试图从一个新的角度 ,考察中国东部季风区植被物候的地域表现。研究区域位于夏季风自南向北推进的路径上 ,限定在 ( 2 3～ 47°N ,1 1 5～ 1 2 0°E)的条状区域内 ,并以 1个纬度的间隔划分出 2 4个空间段。在研究中 ,利用NOAA/NASAPathfinderAVHRR陆地数据集中的规一化植被指数 (ND VI)数据集 ,对 2 4个空间段上的植被物候季节特征进行了经验正交函数 (EOF)分析。使用EOF第一主分量的方差贡献作为一种定量指标 ,以一种定量化的方式 ,确定了由不同植被物候特征表现的植被过渡带和气候过渡带的位置 ,其结果与过去植被生态研究和气候研究中通过植被和气候区域划分提出的过渡带位置相对应 ,验证了在中国东部季风区上现有植被区划和气候区划的合理性。这项研究还表明 ,植被生态的宏观特征可以使用定量化的方法进行分析 ,卫星遥感为此提供了有力的支持。
A new approach to determine the features of vegetation distribution at large scale is found based on the analyses of local vegetation phenological characteristics to survey the zonal behaviors of phenology in monsoon influenced East China. The research area, within a belt of (23～47°N, 115～120°N), was divided into 24 sections with 1°interval in latitude. In each section, emperical orthogonal function (EOF) analysis is applied to the normalized difference vegetation index (NDVI) data set in NOAA/NASA Pathfinder AVHRR Land Data Sets. With the variance contribution of EOF first mode as a quantitative indicator, the locations of ecological transitional zones and climate transitional zones are defined in a quantitative way, which responds to those by ecological and climate divisions in the past plant ecological and climatic studies. The results verify the reasonability of the existed divisions of ecological and climate zones in East China. This study also shows its ability to analyze the large scale features of plant ecology in quantitative ways, especially under the strong support of satellite remote sensing.
出处
《大气科学》
CSCD
北大核心
2000年第3期324-332,共9页
Chinese Journal of Atmospheric Sciences
基金
国家重点基础研究发展规划项目!G1 9990 4 3 4 0 0资助
关键词
卫星遥感
植被
气候
过渡带
数据集
satellite remote sensing
vegetation
climate
transitional zone
