Rainfall trends in arid and semi-arid regions of Iran

被引：369

作者：

Modarres, Reza ^{[1
]}

Rodrigues da Silva, Vicente de Paulo

机构：

[1] Isfahan Univ Technol, Fac Nat Resources, Esfahan, Iran

[2] Univ Fed Campina Grande, Dept Atmospher Sci, BR-58109970 Campina Grande, Brazil

来源：

JOURNAL OF ARID ENVIRONMENTS | 2007年 / 70卷 / 02期

关键词：

climate variability; nonparametric methods; Mann-Kendall test; rainy-days;

D O I：

10.1016/j.jaridenv.2006.12.024

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Time-series of annual rainfall, number of rainy-days per year and monthly rainfall of 20 stations were analyzed to assess climate variability in and and semi-arid regions of Iran. The results showed mixed trends of increasing and decreasing rainfall, which were statistically significant (p<0.05 and p<0.01) only for Sabzevar and Zahedan stations by the Mann-Kendall test. Also, with the exception of Kashan and Torbat stations there was no statistically significant trend in the mean number of rainy-days per year. Increasing and decreasing monthly rainfall trends were found over large continuous areas in the study region. These trends were statistically significant mostly during the winter and spring seasons, suggesting a seasonal movement of rainfall concentration. Results also showed that there is no significant climate variability in the and and semi-arid environments of Iran. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：344 / 355

页数：12

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