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An Investigation on Trends of Annual and Seasonal Rainfall and Temperature in Different Climatologically Regions of Iran

    Authors

    • Maryam Azarakhshi 1
    • Jalil Farzadmehr 2
    • Mahdi Eslah 3
    • Hossein Sahabi 4

    1 Assistant professor, Torbat e Heydariye High Education Complex

    2 Assistant professor, University of Birjand, Agriculture Collage

    3 M.Sc. Student of Watershed Management, University of Mazandaran

    4 Teaching assistant, Torbat e Heydariye High Education Complex

,

Document Type : Research Paper

10.22059/jrwm.2013.35324
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Abstract

Climate change is defined as long term and irreversible changes in the climatic behavior
of a region. Many studies have been conducted in different regions of the world on climate
change. The results of these studies show considerable changes in climatic factors especially
in precipitation and temperature. In this research, the trend of changes in annual and seasonal
rainfall and temperature in 24 synoptic stations over a 50-year data period (1956-2005) was
investigated in Iran. The Mann- Kendall test and linear regression technique were used to analyze
the trend of changes in climatic factors. The results showed both increasing and decreasing
trends in annual rainfall at various regions of Iran. Annual rainfall in northern slopes of Alborz
and western slopes of the Zagros Mountain as well as in eastern and southeast parts of Iran had
a decreasing trend while in the central of Iran the trend of changes was increasing. In southern
region of Iran the rainfall had an increasing trend. The results also showed that temperature in
most of the studied stations over the considered period was increasing. The highest and lowest
changes in temperature were seen in the mean temperature of summer and winter, respectively.
Ahwaz and Khorramabad stations had a decreasing trend and over all seasons would go toward
more cooling. The temperature trend in Oromiye was decreasing in autumn and summer while
Shahrekord and Bandar abbas had the same trend in summer and winter.

Keywords

  • climate change
  • Iran
  • linear regression
  • Mann-Kendall Test
  • trend
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Journal of Range and Watershed Managment
Volume 66, Issue 1 - Serial Number 1
April 2013
Pages 1-16
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History
  • Receive Date: 05 July 2010
  • Revise Date: 30 September 2013
  • Accept Date: 04 July 2012
  • First Publish Date: 21 March 2013
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  • Article View: 4,062
  • PDF Download: 29,524

APA

Azarakhshi, M., Farzadmehr, J., Eslah, M., & Sahabi, H. (2013). An Investigation on Trends of Annual and Seasonal Rainfall and Temperature in Different Climatologically Regions of Iran. Journal of Range and Watershed Managment, 66(1), 1-16. doi: 10.22059/jrwm.2013.35324

MLA

Maryam Azarakhshi; Jalil Farzadmehr; Mahdi Eslah; Hossein Sahabi. "An Investigation on Trends of Annual and Seasonal Rainfall and Temperature in Different Climatologically Regions of Iran". Journal of Range and Watershed Managment, 66, 1, 2013, 1-16. doi: 10.22059/jrwm.2013.35324

HARVARD

Azarakhshi, M., Farzadmehr, J., Eslah, M., Sahabi, H. (2013). 'An Investigation on Trends of Annual and Seasonal Rainfall and Temperature in Different Climatologically Regions of Iran', Journal of Range and Watershed Managment, 66(1), pp. 1-16. doi: 10.22059/jrwm.2013.35324

VANCOUVER

Azarakhshi, M., Farzadmehr, J., Eslah, M., Sahabi, H. An Investigation on Trends of Annual and Seasonal Rainfall and Temperature in Different Climatologically Regions of Iran. Journal of Range and Watershed Managment, 2013; 66(1): 1-16. doi: 10.22059/jrwm.2013.35324

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