Spatial-temporal analysis of snow cover in northwestern Iran

The purpose of the current research is to monitor and evaluate the spatial-temporal variations of snow cover in the northwestern region of Iran, and to investigate the role of the link between the snow cover and the slope direction in the northwestern region of Iran, and the time period considered in this part of the research is similar to Snow-cover (۰۱/۰۱/۲۰۰۳ to ۱۲/۳۱/۲۰۲۰ about ۶۵۴۴ days) was considered and a relationship was established between snow cover and ground surface temperature, monitoring and evaluation of snow-cover spatio-temporal changes (SC) One of the main mountainous units of Iran is the highlands of the northwest of Iran. Investigating the long-term average spatial-temporal variations of snow cover in northwestern Iran shows that there is a great relationship between the height and the last day that the ground has snow cover. The long-term average of SCDs in northwestern Iran (۲۰۰۳-۲۰۲۰) daily, based on snow cover, for example, the spatial changes in the heights and high points of northwestern Iran, starts at the minimum from (۰-۱۱) days and reaches the maximum (۶۲-۱۶۰) days in these areas and at the peak due to the decrease Temperature and seasonal changes include the lowest snow-covered area and the highest snow-covered area in the foothills. Surveys show that, on average, the last day when the earth is covered with snow and after that no more snow is seen on the ground, it starts from lower altitudes and slowly migrates to higher altitudes. For example, in the high areas of the foothills of Sablan, Sahand, Qara Dagh, Avrin, Kale Shin, Yarqosh mountains, Kaifankoh mountains, Tarem mountains, Soltanieh mountains, Mah Nishan mountains, Balqis, Salavat mountains, Chihl Cheshmeh mountains, the snow cover on The ground melts in the middle of March. But again, at the beginning of the month in the northwestern regions of Iran, the number of snow days in the SCDs area is there. And according to the monthly, seasonal, annual and daily maps and charts, it shows how the number of snow-covered days is, as well as the area and The range of snow cover shows well in annual, seasonal, monthly and daily charts.

کلیدواژه ها:

Snow - cover ، Spatial-Team Change ، Madis Sensor ، Northwest of Iran