MODIS多光谱研究攀西地区植被对气候变化响应  

Responses of Vegetation Changes to Climatic Variations in Panxi Area Based on the MODIS Multispectral Data

作　　者：邵怀勇[1] 武锦辉[1] 刘萌[1] 杨武年[1] 

机构地区：[1]成都理工大学地学空间信息技术国土资源部重点实验室,四川成都610059

出　　处：《光谱学与光谱分析》2014年第1期167-171,共5页Spectroscopy and Spectral Analysis

基　　金：国家自然科学青年基金项目(41101174);国家级大学生创新创业训练计划创新训练项目(20120616001);教育部博士点基金项目(20115122120007);四川省科技厅重点项目(13ZA0059)资助

摘　　要：遥感方法定量监测植被与气候变化的关系已经成为全球变化研究的一个重要领域。攀西地区是我国长江上游重要的生态屏障,对维持四川乃至我国整体生态环境的稳定具有重要作用。基于攀西地区多年MODIS多光谱数据和气象数据对植被动态变化以及该变化与气候因子的关系进行了探讨。结果显示,NDVI变化和气温、降水呈正相关,其中降水是影响攀西地区植被生长的主要气候因子,NDVI变化与秋季降水量变化呈现出良好的一致性;研究区植被长势与气温和降水存在一定的时滞性,主要体现在前1个月气温和降水对植被长势的影响上。It is an important research area to quantitatively studying the relationship between global climatic change and vegeta- tion change based on the remote sensing technology. Panxi area is the ecological barrier of the upper reaches of the Yangtze River, and it is essential for the stability of the ecological environment of Sichuan as well as that of the whole China. The present article analyzes the vegetation change in 2001--2008 and the relationship between vegetation change and climatic variations of Panxi area, based on MODIS multispectral data and meteorological data. The results indicate that NDVI is positively correlated with temperature and precipitation. The precipitation is the major factor that affects the change of vegetation in the Panxi region and the trend of NDVI is similar with autumn precipitation; while at the same time the influence of climate has a one-month- time-lag.

关 键 词：植被变化 NDVI 气候因子 相关性 攀西地区 

分 类 号：P942[天文地球—自然地理学]