黄河三角洲NDVI变化与气候因子的相关分析

Correlation Analysis on NDVI Variation and Climatic Factor of the Yellow River Delta in Recent Years

利用MODIS／Terra资料，得到了黄河三角洲地区2000～2004年逐月NDVI统计资料，详细分析了NDVI的时空变化特征，同时研究了NDVI与降水、气温的关系。结果表明：一年中，黄河三角洲NDVI具有明显的周期变化规律，但近年来黄河三角洲的NDVI年际间变化不明显；黄河三角洲地区的气候变化，尤其是气温、降水与NDVI存在着一定的相关性，但相对来说当月NDVI对气温的响应较强，而降雨则对滞后1个月的NDVI的影响较大。

It obtains the monthly statistical series of NDVI of the Yellow River delta area in 2000-2004 period,detailedly analyzes the characteristic of temporal and spatial variation of NDVI and studies the relations between NDVI and precipitation and temperature by using MODIS / Terra data of the United States.The study shows that NDVI of the Yellow River delta has obvious periodic variation law in a year and the variation between years is not obvious in recent years;the climate variation,especially the variations of temperature and precipitation of the Yellow River delta area has a certain relativity with NDVI,relatively speaking,the same month NDVI has greater response to temperature while rainfall has greater influence to one month delayed NDVI.