Flights of Project Jet Stream (19561957) have been analyzed with respect to various meteorological parameters and clear air turbulence near the jet stream in order to find a method for the prediction of high-level turbulence in the atmosphere. It is found that the horizontal velocity convergence ...
Clear Air Turbulence, or CAT, is a phenomenon all airplane travelers should know about. CAT can feel like sudden, unexpected jolts or bumps, often catching passengers off guard. One moment the flight is smooth, and the next, the plane may drop or shake abruptly. These sudden movements can ...
section of the mean moisture tendency fromturbulent diffusionin a global model. Although turbulence can occur anywhere in the atmosphere, e.g. asclear air turbulencenear the jet stream, the main tendencies are near the surface, illustrating the importance of turbulence for exchange with the surface...
The clear air turbulence investigated here is associated to two main mechanisms: Overturning and breaking of internal gravity waves as in the lee of orography (moun- 301 25th International Laser Radar Conference tain waves) and jet stream induced disturbances (Kelvin- ...
What is clear-air turbulence?Turbulence:Hot air balloons are not an example of something that can experience turbulence. This is because hot air balloons move with the wind instead of using an engine to propel forward like airplanes do.
Clear-air turbulence refers to unstable wind patterns and wind shears that occur in clear skies. While pilots may expect turbulence when moving through or over a thunderstorm, there are no cloud or weather indications to forewarn of clear-air turbulence....
In big airplanes that travel high, turbulence is often caused by the jet stream, which can dip low but usually hovers somewhere around 30,000 feet. You can’t see it, but when you cross into or out of it things can get shaky. In small airplanes flying at lower altitudes, wind shear ...
Numerous diagnostic indices have been developed to help forecast the likelihood of high altitude clear-air turbulence (CAT) near the jet stream. A significant shortcoming of many of the indices is that they do not account for unbalanced (i.e. ageostrophic) flow conditions that often occur near...
Why Airplane Turbulence Is On the Rise March 27, 2023 Although not a pleasant experience, turbulence is a normal and sometimes inevitable part of flying.But it could be getting a lot worse—because of climate change.Here's the reason why. Turbulence is caused by wind shear—a variation in ...
was relaxed toward the background jet profile. In this context, in contrast to the unforced decaying case, a state is reached where the turbulence budgets are in quasi-equilibrium within the jet core. From the evolution of the averaged momentum flux above the jet, we found that gravity...