تحلیل فضایی روند بارش در ایران

This research was carried out with the aim of investigating the rainfall of Iran using satellite data in order to solve the statistical gaps of rainfall in some areas. Rainfall images were collected from the GPM sensor with a spatial resolution of 0.1*0.1 degrees for 18 statistical years from 2003 to 2020. First, maps of monthly, seasonal, and annual average rainfall data were obtained for each cell for 18 years, then the dispersion of rainfall data was calculated using the standard deviation parameter, and spatial analysis of trends and time series with Mann-Kendall tests. And the age gradient was done. According to the results obtained in this research, we conclude that there was no significant trend in precipitation on the annual and seasonal time scale, but on the monthly time scale, the changes in the trend are significant, which indicates the anomaly and climate changes. These anomalies can be the result of changes in the temperature and radiation trends in the country and moisture sources that have an effect on the amount and type of rainfall and have pushed the rainfall towards the warm season and spring and become rain, which is stored in the mountains and stored. , affects the underground water and is a warning for water resources, especially in the west and northwest of the country, so it is suggested that the temperature trend of the country and its moisture resources and its influence and relationship on precipitation and its type using satellite data be checked