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Analyzing the Temporal and Spatial Variation of Fog Days in Iran

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Abstract

In order to study the temporal and spatial variation of fog days in Iran, the data of 115 synoptic meteorological stations have been analyzed for years 1960–2005. The results revealed that different types of fogs form all over the country, apart from central areas of Iran that are located in the big dessert of Iran. Advection fogs are common in the south coast (Persian Gulf) and north coastal (Caspian Sea) regions. Upslope fogs form in the mountainous areas of the northwest and north parts of Iran. This study shows no height dependence relationship on fog days for all types of fogs in overall. The trend analysis of fog days during the last 20 years shows some significant negative and positive trends. The frequency of advection fogs shows positive trends and most upslope fogs show negative trends. The results show that there are suitable places for fog collection projects in the north and south coastal regions during the year, especially in cold months.

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Acknowledgments

Here I would like to thank Dr. Robert Schemnauer from Environment Canada for his opinions in preparing this paper, Ian Bell from the Australian Bureau of Meteorology and two anonymous reviewers for their kind improvements in preparing this paper. I also would like to thanks Nooshin Mohammadian from I.R. of Iran Meteorological Organization for preparing maps.

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Correspondence to Mohammad Rahimi.

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Rahimi, M. Analyzing the Temporal and Spatial Variation of Fog Days in Iran. Pure Appl. Geophys. 169, 1165–1172 (2012). https://doi.org/10.1007/s00024-011-0326-y

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  • DOI: https://doi.org/10.1007/s00024-011-0326-y

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