A Darth Vader on the Gatwick Express. Darth Vader (plural Darth Vaders) A powerful individual or force, particularly one that is seen as malevolent, dominating and threatening. Robert Whiting, The Meaning of Ichiro: The New Wave from Japan and the Transformation of Our National Pastime (2004) p. 130:
exists and is an alternate of . Wind is a horizontal flow of air from higher pressure to lower pressure the force that generates wind is called the Pressure-Gradient Force. Wind is a horizontal flow of air from higher pressure to lower pressure the force that generates wind is called the Pressure-Gradient Force.
The winds in a jet stream are caused by differences in temperature between two large air masses that border the tropopause. These temperature differences create differences in air pressure between the air masses. As colder air tries to move toward the warmer air, winds form.