摘要
基于MODIS-NDVI数据分析澜沧江流域生长季植被NDVI时空特征和变化趋势,结合地形数据、气象站点数据和植被类型数据,利用趋势分析和相关性分析法研究植被NDVI变化对气候因子的响应。结果表明:1)2000-2017年澜沧江流域生长季植被NDVI均值为0.592,整体呈现出由西北向东南波动增加趋势,增长速率为0.09%/10年;2) 2000-2017年澜沧江流域气温呈上升趋势,降水呈下降趋势,植被NDVII总体与平均气温的相关性高于累积降水量;3)澜沧江流域生长季植被NDVI驱动因子分析表明,气候驱动中以气温降水联合驱动为主,流域植被NDVI变化整体为非气候驱动。
This study investigated spatiotemporal trends of the normalized difference vegetation index( NDVI) in growing season and the climate driving forces of its effect from 2000 to 2017 in the Lancang River Basin. Especially,the response of climatic factoes based on the MODIS NDVI,combined with the vegetation map,meteorological datda,as well as topographic data,were investigated and the trend line and correlation analysis methods were used. The results showed that: 1) From 2000 to 2017,the average NDVI of vegetation in the growing season of Lancang River Basin was 0.592,and the overall trend of NDVI increased from northwest to southeast,and the growth rate was 0.09%/10 a.2) The air temperature in the Lancang River Basin showed an upward trend and the precipitation showed a downward trend during 2000-2017. The correlation between total vegetation NDVI and average air temperature was higher than that of cumulative precipitation.3) In Lancang River Basin,the climate drive is mainly driven by temperature and precipitation,and the NDVI changes in the basin vegetation are non-climate-driven as a whole.
作者
张甜甜
易桂花
张廷斌
魏澎涛
杨达
杜清江
ZHANG Tiantian;YI Guihua;ZHANG Tingbin;WEI Pengtao;YANG Da;DU Qingjiang(College of Tourism and Urban-Rural Planning,Chengdu University of Technology,Chengdu 610059,China;College of Management Science,Chengdu University of Technology,Chengdu 610059,China;College of Earth Science,Chengdu University of Technology,Chengdu 610059,China;College of Engineering&Technical,Chengdu University of Technology,Leshan 614000,China)
出处
《测绘与空间地理信息》
2020年第3期49-53,共5页
Geomatics & Spatial Information Technology
基金
国家自然科学基金项目(41801099)资助。
