Monitoring DSI and Lancaster Indices for Study Dust and Sand Storm In Meteorological Mehrabad Station of Tehran
Keywords:Dust, Climatic factors, Drought index, Desert, Dust and Sand Storm, Tehran
The first climatic factors affecting the phenomenon of dust and fine dust are collected, reconstructed, extended and completed in the form of DSI (Dust Storm Index) and Lancaster in Mehrabad meteorological station of Tehran was studied and analyzed. The results showed that in Mehrabad meteorological station in terms of temperature in 1992 the lowest value and in 1998, 2001, 2017 the highest value and in terms of humidity in 2017 the lowest amount of humidity and in 2000 the highest amount of humidity and in terms of rainfall in the year 2013 the lowest amount of precipitation and in 2019 the highest amount of precipitation and in terms of evaporation in 2009 the lowest amount of evaporation and in 1391 the highest amount of evaporation and finally in terms of number of dust days in 1998 the lowest number of days and in 2009 the highest number of days Dust has been recorded. Mehrabad station of Tehran in years showed DSI index, more than one number and Lancaster index, more than fifty number in most of the mentioned years, the values of temperature and evaporation are high and the values of precipitation and humidity are relatively low, which shows the direct relationship between the dust storm index (DSI index) and mobility index of sand dunes (Lancaster index) is almost too high and above the number It is noteworthy that in most of the mentioned years, Meteorological factors and data have been at Mehrabad station in Tehran.
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