Author(s): Mohsen Maghrebi; Sadegh Partani; Farshid Bostanmaneshrad
Linked Author(s): Sadegh Partani
Keywords: No Keywords
Abstract: Temperature and precipitation are important indicators of the hydrological cycle that affect different aspects of human life. This paper aims to present and analyze the spatiotemporal variation and change point detection of precipitation and monthly air temperature (average, minimum and maximum) for a duration of 1964 to 2014 in the major urban area across Iran using Theil-Sen and Mann-Kendall trend analysis. This research output showed that highest range of rainfall changes occurred at stations adjacent to the Caspian Sea (Rasht and Gorgan synoptic stations) in the north and the Persian Gulf border (Bushehr synoptic station) at the south of the country. Winter, spring and autumn precipitation decreased by 92%, 73%, and 46% of whole stations, respectively. Application of Theil-Sen estimator also showed that, minimum and maximum temperature has been increased and the central area of Iran has the highest rate of temperature rise. Also, the average temperature trend showed that autumn average temperature decreased while the temperature increased in other seasons. Also, Mashhad, Zahedan, Tabriz, Khorramabad and Shiraz stations, record continuously increasing trend of temperature in all months. This study sheds light on the challenges of accessing surface water resources in arid and semi-arid environments due to natural and anthropogenic driven factor.
Year: 2022