Trend analysis of maximum wind speeds of Sistan 120 days wind using Mann-Kendall and Sens Estimators slope tests

The aim of this article is the examination of trend of wind speed changes in Zabol synoptic station by using of nonparametric ways. Mann-kendall and Sens Estimators slope two tests which are the commonest nonparametric ways used for trend analysis in month scale. These two upper tests on date month speed wind and maximum wind and maximum win frequency in mention station during 1963-2014 the period applied. The results showed that two ways in all months. In%95 confidence level were nearly in the same. Besides Mann-Kendall test has not shown special trend while in the ways of Sens Estimators slope has shown special trend. the results of study has shown non-trend in maximum wind speed in Sens Estimators slope in%95 confidence level and%99. While in Mann-Kendall test during August confidence level was different. The results of speed changes in Zabol synoptic station during 1963-2014 which the 120 days winds increased were increasingly and positive which this increase in the wind maximum speed were sensible than average wind speed. The results of this study shows that there is significance increasingly trend in both average quantity speed wind and maximum wind.