| The spatial and time series of vegetation temperature condition index (VTCI) for Guanzhong Plain and Weibei Tablelands are analyzed using weighted Markov model.The VTCI images of 2 lead-time prediction are got.Comparing the monitoring images with the forecasting images,we can find the similar characters showing similar drought distribution between the monitoring image and the forecasting image.The further difference detection in difference images shows that the average difference of 1-step prediction is 0.042,and the average difference of 2-step prediction is 0.152. |