Volume 9, Issue 3 (2021)                   ECOPERSIA 2021, 9(3): 0-0 | Back to browse issues page

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Jowkar L, Panahi F, Sadatinejad S J, Shakiba A. The Spatial and Temporal Variability of Temperature Extremes Using Gridded AgMERRA Dataset Over the Bakhtegan-Maharloo Basin, Iran. ECOPERSIA. 2021; 9 (3)
URL: http://ecopersia.modares.ac.ir/article-24-45017-en.html
1- Faculty of Natural Resources and Earth Sciences, University of Kashan
2- Faculty of Natural Resources and Earth Sciences, University of Kashan , alabd_fpanahi@yahoo.com
3- Department of Renewable Energy and the Environment, University of Tehran
4- Center for Remote Sensing & GIS Research, Faculty of Earth Science, Shahid Beheshti University
Abstract:   (117 Views)
Aims Trend analysis of climatic variables has got a great deal of notice from researchers recently. The main aim of this study was to investigate the spatio-temporal variability of temperature extreme indices based on the station and gridded analyses over the Bakhtegan-Maharloo basin in Iran from 1980 to 2010.
Materials & Methods Climate data related to Bakhtegan-Maharloo basin extracted from AgMERRA dataset for the study time period (1980-2010) using R software. Daily temperature data was also extracted from the Meteorological Archive of meteorological stations in the basin during the study period. TN90p, TNx, TN10p and CSDI indices were selected from the indices recommended by ETCCDMI and calculated by RClimDex software package.
Findings The results of AgMERRA and stations data showed an increasing trend in warm extremes including TN90p with the changes trend of 0.135 to 0.721 and TNx, 0.061 to 0.139 but a declining trend in cold extremes including TN10p with the changes trend of -0.517 to -0.125 and especially CSDI, -0.987 to -0.167.
Conclusion The results of this study may contribute to a better understanding of regional temperature behavior in the study area. In general, the results showed that the frequency and intensity of cold extremes have declined, though, warm extremes significantly increased. Rgarding the impact of temperature extremes changes on human activities, it is essential to speculate the effects of these extreme climatic events in future planning in different sections.
     
Article Type: Original Research | Subject: Desert Ecosystems
Received: 2020/08/7 | Accepted: 2020/12/21 | Published: 2021/04/29
* Corresponding Author Address: خیابان شریعتی بالاتر از سید خندان- بالاتر از خواجه عبدالله- کوچه شهید هادی آریایی- پ 35

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