Nature and observation of high-level turbulence especially in clear air

Study of Clear Air Turbulence over Iranian Plato

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...

Clear-air turbulence in a changing climate

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 ...

Verification of clear-air turbulence forecasts

the relationship between academic self-concept and academic achievement in english and general subjects of the students of high school

according to research, academic self-concept and academic achievement are mutually interdependent. in the present study, the aim was to determine the relationship between the academic self-concept and the academic achievement of students in english as a foreign language and general subjects. the participants were 320 students studying in 4th grade of high school in three cities of noor, nowshah...

High Altitude Clear Air Turbulence Probability Based on Temperature Profiles and Rawinsonde Ascensional Rat

Occurrences of clear air turbulence in the stratosphere at altitudes of 45,000 to 68,000 f t are analyzed in terms of observed variability in vertical temperature gradients and balloon ascensional rates based on nearby radiosonde data. While the magnitudes of both parameters are positively correlated with the probability of encountering turbulence, the temperature gradient variability has a hig...