Research Article Open Access

Analysis of Trends in Daily and Overnight Temperature Over Iran's Zayanderud River Basin

Ali Zahraei1, Sara Saadati1, Saeid Eslamian2 and Kaveh Ostad-Ali-Askari2
  • 1 University of Tehran, Iran
  • 2 Isfahan University of Technology, Iran
American Journal of Engineering and Applied Sciences
Volume 13 No. 3, 2020, 409-418

DOI: https://doi.org/10.3844/ajeassp.2020.409.418

Submitted On: 10 June 2018
Published On: 4 August 2020

How to Cite: Zahraei, A., Saadati, S., Eslamian, S. & Ostad-Ali-Askari, K. (2020). Analysis of Trends in Daily and Overnight Temperature Over Iran's Zayanderud River Basin. American Journal of Engineering and Applied Sciences, 13(3), 409-418. https://doi.org/10.3844/ajeassp.2020.409.418

Abstract

Daily and overnight temperature trends in annual time-scale for Zayanderud river basin using 37 meteorological stations were studied. According to the results the majority of trends in the time series of daily and overnight temperature were increasing. Warming trends in the overnight temperature were stronger than those in the daily temperature. The average of all stations in the daily and overnight trends was 0.003 and 0.014C year−1 respectively. Overall warming trends (daily-overnight) were consistent with increasing urbanization. Regional warming trends were more obvious in the more urbanized area in central and eastern basin. There were weak cooling trends in daily temperature in the western and southwestern basin with a colder and more rainfall climate.

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Keywords

  • Climate Change
  • Daily and Overnight Temperature
  • Trend
  • Zayanderud River Basin
  • Iran