محاسبه آب بارش شو، ميانگين دماي جو و شكست اتمسفري با داده هاي كاوشگر

Compute of Precipitable Water, Mean Temperatured and Atmospheric Refractivity by Radio sound Data

Total mass of water vapor in a particular location from the surface to the end of atmosphere which is called perceptible water is a parameter that is used to estimate the precipitation. In this paper the data in Mehrabad station has been analyzed from 1982 to 1995. And in this station for all the months of the year, the perceptible water, mean temperature and atmospheric refractivity has been computed and by adding the STD to the mean and subtracting it from the mean, the very dry and wetperiode and also very cold and warm period has been classified. Also, the examination of mean perceptible water and temperature and atmospheric refractivity on January , 1999 shows that the precipitation in this month is normal and iv as a cold to very cold period. And the examination total perceptible water and precipitation shows that without considering the flux humidith, only 7.6 % of perceptible water has been precipitated.