This study was carried out using two sets of numerical weather forecast data and flight reports for Clear Air Turbulence (CAT) over Iranian Plato to find atmospheric flow patterns favorable to the formation of CAT. The numerical data include five months of AVN analysis with horizontal resolution of 1 degree(about 100 km) and four months forecast data of MM5 model with resolution of 50 km. Impor...

Atmospheric turbulence causes most weather-related aircraft incidents. Commercial aircraft encounter moderate-or-greater turbulence tens of thousands of times each year worldwide, injuring probably hundreds of passengers (occasionally fatally), costing airlines tens of millions of dollars and causing structural damage to planes. Clear-air turbulence is especially difficult to avoid, because it ...

Abstract The ranges of the parameters wind and temperature (refractive) turbulence are estimated corresponding to four-point scale intensity at flight altitudes in free atmosphere. It is shown that estimates both variance radial velocity measured with a coherent lidar direction structural constant refractive index from measurements make it possible judge potential danger bumpy aircraft clear-ai...