Long-term spatial heterogeneity of correlation between climatic factors and NDVI in the Yellow River Basin
In response to the complex changes in vegetation caused by regional differences in the climate of the Yellow River Basin,this study selected climate data and NDVI data from 1981 to 2020 in the Yellow River Basin,and used methods such as centroid model and GWR model to explore the spatial heterogeneity of vegetation NDVI spatial changes and driving factors in the Yellow River Basin.The results indicate that the distribution of vegetation NDVI in the Yellow River Basin is uneven and has significant spatial autocorrelation;From 1981 to 2020,the vegetation NDVI center of gravity shifted 29.96 km towards the northeast direction,showing a"northeast→east→northeast"migration trend;The impact of climate factors on vegetation NDVI exhibits spatial heterogeneity.Precipitation factors have a positive impact on both arid and semi-arid regions,with regression coefficients ranging from 0.130 to 1.477.Temperature has a negative impact on vegetation NDVI,accounting for as much as 72.3％.
Yellow River BasinNDVIgeographically weighted regression modelMoran indexspatial heterogeneity
NETL
NSTL
万方数据
