Spatial analysis and study of Tele-connection patterns of drought in central Iran

In This research, considering peripheral circulation approach, drought periods during the 22years (2013-1992) in 21 synoptic stations located in Kerman, Yazd and Isfahan provinces, were calculated using Standardized Precipitation Index (SPI) annually. Tele-connection pattern data extracted from NCEP|NCAR site and were investigated of relationship between major droughts in the region and Tele-connection patterns based on correlation and multivariate regression model. Totally, about 37.42% of the changes Drought Index to SPI in Isfahan and around 51.09 % SPI changes in Kerman and 42.17 % SPI changes in Yazd are exhibited by patterns. Scandinavia Pattern (SCA) in Esfahan and East Atlantic Pattern (EA) in Kerman and Tropical Southern Atlantic (TSA) in Yazd, as the most effective pattern of annual SPI changes, were exhibited in Central Iran.