Seasonal monitoring of drought in the country Using CRU network data

Drought is a natural and recurring feature of the climate that occurs in all climatic regions, but its structure and important effects vary from region to region.The main purpose of this study is to investigate the country's meteorological droughts over a long period of time using network data with appropriate spatial and temporal resolution. Data analysis was performed using SPEI multivariate index. The results of drought calculation showed that in terms of time during the period (1966-2015) the rainfall of the cold period of the year decreases in general, the decrease in rainfall in different parts of the country mainly starts from the late 90s In the last years of the study period, except in autumn, we see more repetition of dry periods and unlike the late 80s, droughts have occurred more. Moderate drought intensities are significant and experience of severe droughts, which are among the most critical areas of the country.