Spatio-temporal response of vegetation cover to climatic factors in Ningxia
[Objective]Vegetation is an important part of measuring the quality of the ecological envi-ronment.Studying the extent of vegetation cover can provide a theoretical basis for regional ecological im-provement,so that appropriate measures can be taken to improve the ecological environment.[Method]Us-ing the MODIS-NDVI dataset and meteorological data from 2001 to 2021,the spatio-temporal evolution of vegetation cover in Ningxia is analyzed by maximum value synthesis method,mean value method,trend analysis method and correlation analysis method,and the relationship between spatio-temporal vegetation change and climatic factors is discussed.[Result]From 2001 to 2021,the vegetation cover in Ningxia showed an increasing trend of fluctuation,the growth rate was 0.0014,the change rate of summer NDVI was 0.002 4,and the vegetation improvement was obvious.In terms of area,from 2001 to 2021,the vegeta-tion cover in the southern region increased significantly,accounting for 27.75% of the total area;in the cen-tral region,the vegetation cover remained basically unchanged,accounting for 39.21% of the total area;in the northern region,the vegetation cover decreased significantly,accounting for a relatively small area.In southern China,vegetation cover was negatively correlated with temperature and positively correlated with precipitation.In northern China,vegetation cover is positively correlated with temperature and negatively correlated with precipitation.[Conclusion]From 2001 to 2021,the vegetation cover in Ningxia showed a gradual improvement trend and the ecological environment gradually improved,which was related to the in-crease in temperature and precipitation in the study area in the last 20 years.
NETL
NSTL
万方数据
