عنوان مقاله [English]
نویسندگان [English]چکیده [English]
So far seasonal variation in the level of snow cover in mountainous regions is considered as an important economic factor; In the present study surveyed the height snow and temperature series trend (average temperature, minimum temperature and minimum absolute temperature) in Koohrang station in the annual and seasonal scale during period 1990-2011. The start performed of measure the normal for temperature series and height snow in the annual and seasonal scale use Ryan – Juiner test. Then surveyed trend it parameters with notice to distribution data using the t and tau - Kendall tests. In continue performed measurement of relationship between the amount of snow with temperature series using the Pearson's test. The results seasonal and annual scale showed a decreasing trend the snow and increase trend the temperature series during period studied. Results measurement of relationships also indicate a inverse correlation between mean temperature and minimum temperature with annual snow and fall at 95% level and with snow in winter and spring 99% level. About absolute minimum temperature results explanatory inverse correlation with the annual snow and winter and spring and lack correlation in fall.