中国北方地区植被覆盖度遥感估算及其变化分析  

Fractional vegetation cover estimation in northern China and its change analysis

作　　者：李钰溦 贾坤[1] 魏香琴[2] 姚云军[1] 孙俊 牟丽秋 

机构地区：[1]北京师范大学地理学与遥感科学学院遥感科学国家重点实验室,北京100875 [2]中国科学院遥感与数字地球研究所,北京100101 [3]西林吉林业局综合设计队,大兴安岭165300 [4]大兴安岭神州北极木业有限责任公司宜家分公司,大兴安岭165300

出　　处：《国土资源遥感》2015年第2期112-117,共6页Remote Sensing for Land & Resources

基　　金：国家自然科学基金项目"基于机器学习和融合算法的全球陆表植被覆盖度遥感估算方法研究"(编号:41301353);遥感科学国家重点实验室自由探索项目"多尺度植被覆盖度观测实验与遥感产品验证数据集生产"(编号:14ZY-06);国家"863"计划项目"全球生态系统与表面能量平衡特征参量生成与应用"(编号:2013AA122801);国家测绘地理信息局科技领军人才科技资助项目共同资助

摘　　要：为了分析中国北方地区2000年之后植被覆盖度的时空分布及其变化,利用MODIS光谱反射率数据计算归一化植被指数,采用像元二分模型对中国北方地区2000—2012年植被覆盖度进行定量估算,分析研究区13 a间植被覆盖度的时空变化特征。研究结果表明:植被覆盖度年内变化特征体现在最大植被覆盖度一般出现在7和8月份,与中国北方地区植被的生长季相一致;整个中国北方地区年最大植被覆盖度呈现缓慢增长的趋势,其增长速率为每年0.2%;年最大植被覆盖度变化的空间分布具有较大差异,其中东北、华北和黄土高原等三北防护林工程建设区的年最大植被覆盖度有较明显的增长。The aim of this study is to analyze the spatial-temporal pattern and change of fractional vegetation cover （FVC） in northern China since 2000. FVC of northern China from 2000 to 2012 was estimated using dimidiate pixel model based on the normalized difference vegetation index （ NDVI） calculated by MODIS spectral reflectance data. The FVC change trends and characteristics of the study area during the 13 years were analyzed. The inner annual FVC change trend in northern China indicated that the maximum FVC generally appeared in July or August, which was consistent with the vegetation growth season. The maximum annual FVC showed a slightly increase trend in the whole study area, and the annual increase rate was 0. 2%. However, the spatial distribution of maximum annual FVC change trend had great differences. The typical regions of the Three-North Shelter Forest Region such as Northeast China, North China and Loess Plateau region had an obviously increase in maximum annual FVC.

关 键 词：像元二分模型 中国北方 植被覆盖度 时空变化特征 

分 类 号：TP9[自动化与计算机技术] S127[农业科学—农业基础科学]