Abstract—The formation of settlement mainly depends on the climatic conditions of that region. And when people can adapt themselves and their activities with the climate of a region, communities appear. Precipitation is the most important climatic parameter in determining the climate kind in an area. Generally, we use long term annual and monthly precipitation to show rainfall in a region. Whenever there is little precipitation, the residents adapt themselves with this shortage. But if there is a lot of precipitation change in a region and precipitations distribution is too much and also unpredictable, the human life will be in danger. Precipitation change in the long term is of great important, but more important than that is the change in precipitation coefficient variation. An analysis of precipitation statistics an Zabol station shows that mean annual precipitation in Zabol has been about 61 millimeters over the last forty years, with the lowest in 2001 (7.2 mm) and the highest in 2005 (129.5 mm). The amount of precipitation has fluctuations during this time with no definite rise or fall, but precipitation coefficient variation during these years has increased compared with that of the previous decades. If this trend continues, it can cause many problems for the residents in this region.

Index Terms—Precipitation Variation, Coefficient Variation, NAO, ENSO.

Dr Amir Gandomkar, Professor assistant of Najafabad Branch, Islamic Azad University, Najafabd, Iran.

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Cite: Amir Gandomkar, "The Study of Climate Change, Using Statistical Analyses (Case Study: Precipitation Variation in Zabol, Iran)," International Journal of Environmental Science and Development vol. 2, no. 3, pp. 167-169, 2011.