Analysis of NDVI evolution in the Yellow River basin due to climate delay effects
In the report,the Sen trend analysis with Mann-Kendall significance test,gravity model,multiple lin-ear regression equation,time delay correlation and residual analysis,were used to analyze the Yellow River ba-sin vegetation and the response mechanism to climate and evaluate the influence of human activity on NDVI(Normalized difference vegetation index).The conclusions were obtained that during the study period,the ba-sin vegetation NDVI overall rise,the center of gravity is mainly distributed in the southeast of the basin,the growth rate increment of NDVI in the southeast is significantly greater than that in the northwest.The air temper-ature NDVI was used as the main driver factor during the growing season in the most areas of the watershed.The response of NDVI to temperature during the growing season was mainly lagged by about 1 month,the response of NDVI to temperature during the growing season was mainly lagged by about 2 months.The influence of human activity on NDVI in the basin decreases from the southeast to the northwest,and the human activity in most of the area promotes vegetation NDVI.
Yellow River basinNDVItrend analysisgravity modelmultiple linear regressiontime delay partial correlationresidual analysis
万方数据
维普
