Ghadermazi, Hasan, Masoompour Samakosh, Jafar, Fatemi, Seyed Ehsan, Hafezparast, Maryam. (1404). Spatial-Temporal Variations and Trends in Freezing Level Height in Iran: An Analytical Perspective. , 51(4), 89-103. doi: 10.22059/jesphys.2025.386947.1007650
Hasan Ghadermazi; Jafar Masoompour Samakosh; Seyed Ehsan Fatemi; Maryam Hafezparast. "Spatial-Temporal Variations and Trends in Freezing Level Height in Iran: An Analytical Perspective". , 51, 4, 1404, 89-103. doi: 10.22059/jesphys.2025.386947.1007650
Ghadermazi, Hasan, Masoompour Samakosh, Jafar, Fatemi, Seyed Ehsan, Hafezparast, Maryam. (1404). 'Spatial-Temporal Variations and Trends in Freezing Level Height in Iran: An Analytical Perspective', , 51(4), pp. 89-103. doi: 10.22059/jesphys.2025.386947.1007650
Ghadermazi, Hasan, Masoompour Samakosh, Jafar, Fatemi, Seyed Ehsan, Hafezparast, Maryam. Spatial-Temporal Variations and Trends in Freezing Level Height in Iran: An Analytical Perspective. , 1404; 51(4): 89-103. doi: 10.22059/jesphys.2025.386947.1007650

Spatial-Temporal Variations and Trends in Freezing Level Height in Iran: An Analytical Perspective

فیزیک زمین و فضا
مقاله 7، دوره 51، شماره 4، زمستان 1404، صفحه 89-103    اصل مقاله (1.26 M)
نوع مقاله: مقاله پژوهشی
شناسه دیجیتال (DOI): 10.22059/jesphys.2025.386947.1007650
نویسندگان
Hasan Ghadermazi1؛ Jafar Masoompour Samakosh* 1؛ Seyed Ehsan Fatemi2؛ Maryam Hafezparast2
1Department of Geography, Faculty of Literature and Humanities, Razi University, Kermanshah, Iran.
2Department of Water Engineering, Campus of Agriculture and Natural Resources, Razi University, Kermanshah, Iran.
چکیده
This research investigates the temporal and spatial changes of freezing level height (FLH) in Iran over the statistical period from 1940 to 2023, using the modified Mann-Kendall non-parametric analysis method. The results indicate a significant upward trend in FLH from December to April. Except for summer, the upward trend is quite evident during autumn, winter, and spring. Annual changes in FLH show a significant upward trend during the study period. These significant upward trends at monthly, seasonal, and annual scale can show one of the consequences of climate change in Iran. Spatial analysis reveals an inverse relationship with the latitude, and as latitude decreases (towards southern regions of Iran), FLH increases. This relationship is more clear in winter, with the correlation coefficient between FLH and latitude being significant at the 0.05 alpha level. Additionally, FLH shows a direct relationship with longitude, increasing as one moves eastward. The highest freezing level height is observed in Chabahar (4347.5 meters) in southeastern Iran. Considering the decrease in snow cover and increase in heavy rainfall in Iran, monitoring variations in freezing level height can be useful for predicting these variables.
کلیدواژه‌ها
Freezing Level Height؛ Trend؛ Sen’s slop؛ Iran
مراجع
آمار
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