THE SPATIAL ANALYSIS OF HEAT WAVES IN SOUTH EAST OF IRAN A CASE STUDY: SISTAN AND BALUCHESTAN PROVINCE

This study describes the main characteristics of a heat wave that occurred over Sistan and Baluchestan. Province located in the south east of Iran. First, we analyzed daily maximum temperature (DMT) recorded at 12 stations during 1961-2015, in southern of Iran. Then geographical patterns of heat waves (HWs), including those persisting for 2-5 days and longer over this province were studied. To indicate heat waves we used the value of the 90th percentile of the annual maximum temperature distribution at a station an then heat wave (FIWs) is defined as the maximum number of consecutive days where the daily maximum temperature the long-term daily 90th percentile. Our analysis showed that Two poles of high frequencies (over 2 days per year) of the HWs during April October were found in the regions of Jazmourian plain and the northern areas of SB. HWs increased significantly during the studied period in most regions of the province, especially over the northwestern areas and the west Sistan and Baluchestan. Increasing trend of HWs occurred after the 2005s in all regions, especially in northern SB and the southeastern coastal.