Analysis of the effect of drought phenomenon on dust events in different regions of Ghazvin province

This study was conducted to investigate the effect of drought on dust events in different cities of Qazvin province. Rainfall and temperature data were used to calculate the standardized precipitation-evapotranspiration index (SPEI) and three-hourly dust events data were used to calculate the number of dusty days in the study stations. Based on the Spearman correlation coefficient, the impact of dust events on the drought phenomenon was investigated by considering different time delays. The maximum correlation between SPEI and the number of dusty days in Ghazvin city without considering the time delay of -0.38 and at the level of 99%, was significant, indicating the simultaneous impact of dust events from the drought phenomenon in the center of the province. The results also showed that the response time of dust events to meteorological drought with a delay of one year in Moallem Kalayeh city is significant at 90% confidence level (r = -0.52). Meanwhile, in other cities of Ghazvin province, no significant relationship was observed between the two phenomena of dust occurrence and meteorological drought.