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Chapter 6.2 - Chapter 6.2 Upper Atmospheric Circulation...

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Chapter 6.2 Upper Atmospheric Circulation I.a.i. Constant Isobaric Surface : pressure level such as 500 mb used for a pressure-reference datum in the upper atmosphere I.a.i.1. Near ridges in isobaric surface: winds slow and converge (pile up) I.a.i.1. Near troughs in isobaric surface: areas of maximum wind speeds accelerate and diverge (spread out) I.a.i. Rossby Waves I.a.i.1. Named for meteorologist Carl G. Rossby I.a.i.1. Great waving undulations within westerly flow of geostrophic winds I.a.i.1. Bring cold air southward and warmer tropical air northward until distinct cyclonic circulation forms--> cyclonic storm systems of cold air at surface I.a.i. Jet Streams I.a.i.1. Most prominent movement in upper-level westerly wind flows I.a.i.1. Irregular, concentrated band of wind occurring at several different locations that influences surface weather systems I.a.i.1. Tend to weaken during the hemisphere's summer and strengthen during its winter as they shift closer to the equator I.a. Local Winds I.a.i.
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