Theoretical and Applied Climatology

, Volume 125, Issue 1–2, pp 213–225 | Cite as

Detection of trends in days with extreme temperatures in Iran from 1961 to 2010

  • Alireza Araghi
  • Mohammad Mousavi-Baygi
  • Jan Adamowski
Original Paper


Human health and comfort, crop productivity, water resource availability, as well as other critical hydrological, climatological, and ecological parameters are heavily influenced by trends in daily temperature maxima and minima (T d max, T d min, respectively). Using Mann–Kendall and sequential Mann–Kendall tests, trends in the number of days when T d max ≥ 30 °C or T d min ≤ 0 °C, over the period of 1961 to 2010, were examined for 30 synoptic meteorological stations in Iran. For 67 % of stations, days when T d min ≤ 0 °C showed a significant negative trend, while only 40 % of stations showed a significant positive trend in days when T d max ≥ 30 °C. The upward trend in T d max became significant between 1967 and 1975, according to the station, while the downward trend in T d min became significant between 1962 and 1974 for the same stations. Changes in precipitation type across most parts of the country show a high correlation with these temperature trends, especially with the negative trend in T d min. This suggests that future climatological and hydrological alterations within the country, along with ensuing climatic issues (e.g., change in precipitation, drought, etc.) will require a great deal more attention.


Synoptic Station Significant Positive Trend Precipitation Type Significant Negative Trend Extreme High Temperature 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



We would like to thank the editor-in-chief and anonymous reviewers for their valuable comments that helped us improve the final version of the article.


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Copyright information

© Springer-Verlag Wien 2015

Authors and Affiliations

  • Alireza Araghi
    • 1
  • Mohammad Mousavi-Baygi
    • 1
  • Jan Adamowski
    • 2
  1. 1.Department of Water Engineering, Faculty of AgricultureFerdowsi University of MashhadMashhadIran
  2. 2.Department of Bioresource Engineering, Faculty of Agriculture and Environmental SciencesMcGill UniversitySainte-Anne-de-BellevueCanada

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