Meteorology: Understanding the Atmosphere Ackerman and Knox
Jet Stream and Horizontal Temperature Gradients
Today's weather reports often discuss the position of the jet stream. A jet stream is a narrow stream of relatively strong winds (i.e. wind speeds greater than 50 knots). The term jet stream is used to describe these winds because of how they were discovered.
The existence of the polar front jet streams is tied to the presence of horizontal temperature gradients. If temperature gradients exist through a deep layer of the troposphere, a pressure gradient force increases with height throughout the layer, and therefore so does the wind. The relationship between wind speed and temperature gradients is demonstrated with the following simple model.
Use the simple model below to answer the following questions (Instructions):