TREND ANALYSIS OF MEAN WIND SPEED IN DIFFERENT CLIMATIC REGIONS OF IRAN

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GHAHRAMAN N.; GHARAHKHANI A.

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Journal: Iranian Journal of Irrigation and Drainage Year:2010 | Volume:4 | Issue:1 Page(s): 31-43

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Title

TREND ANALYSIS OF MEAN WIND SPEED IN DIFFERENT CLIMATIC REGIONS OF IRAN

Author(s)

GHAHRAMAN N. | GHARAHKHANI A. | Issue Writer Certificate

Keywords

IRANQ3

TRENDQ2

WIND SPEEDQ2

REGRESSION ANALYSISQ2

RHO SPEARMANQ3

MANN- KENDALLQ2

Abstract

Relatively little work has been done examining historical data of WIND SPEED searching for evidence of climate change as compared to other parameters. The purpose of this study was to assess changes in mean WIND SPEED over the period 1975-2005. in a network consisting of 40 synoptic stations of IRAN. These stations represent different climates of the country based on extended- De Martonne climatic classification. All seasonal and annual series have been checked for normality with the Kolmogorov-Smirnov test. Time TRENDs of this variable were analyzed using parametric and non-parametric techniques (Pearson correlation coefficient, least square linear regression, Mann-Kendall and rho-Spearman correlation coefficient). The results showed that based on the Mann-Kendall, RHO SPEARMAN and Pearson methods, 50%, 60% and 70% of the annual series had significant TREND respectively. Besides, the most significant increasing TREND was observed in winter and the least increasing TREND in summer. The semi arid-temperate climates have experienced the most significant decreasing TREND of mean WIND SPEED, i.e. 0.045 m.s-1 .dec-1. In semi arid cold climates; most increasing TREND of 0.145 m.s-1 .dec-1 was observed. In general, the decreasing TREND of series was more than increasing TREND which in turn, might change the evapotranspiration in arid and semi arid climates of IRAN.

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APA: Copy

GHAHRAMAN, N., & GHARAHKHANI, A.. (2010). TREND ANALYSIS OF MEAN WIND SPEED IN DIFFERENT CLIMATIC REGIONS OF IRAN. IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE, 4(1), 31-43. SID. https://sid.ir/paper/131780/en

Vancouver: Copy

GHAHRAMAN N., GHARAHKHANI A.. TREND ANALYSIS OF MEAN WIND SPEED IN DIFFERENT CLIMATIC REGIONS OF IRAN. IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE[Internet]. 2010;4(1):31-43. Available from: https://sid.ir/paper/131780/en

IEEE: Copy

N. GHAHRAMAN, and A. GHARAHKHANI, “TREND ANALYSIS OF MEAN WIND SPEED IN DIFFERENT CLIMATIC REGIONS OF IRAN,” IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE, vol. 4, no. 1, pp. 31–43, 2010, [Online]. Available: https://sid.ir/paper/131780/en

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