METR 360
Fall, 2009
Norwegian Cyclone Model Review
Norwegian Cyclone Model Lectures
Schematic of a mature cyclone (following Bjerknes and Solberg)
Fronts
Cold front: features and schematic cross section
Warm front: features and schematic cross section
Why fronts always lie in troughs
Margules' formula for slopes of fronts
Stability
Sample skew-T log-P diagrams: Stable lapse rates, Absolutely unstable lapse rate, Conditionally unstable lapse rate
Examples (from NCAR-RAP): Flagstaff (Abs. unstable), Miami (Conditionally unstable), Albany (Abs. stable)
Air Masses
Upper air and Thickness lectures
Vertical Motion
Vorticity advection derivation (this is a .gif file)
Temperature advection derivation (another .gif file)
Waves in the Westerlies (Rossby waves)
Here are some places to view hemispheric upper air maps and see the waves: 300 mb from Unisys Univ. Wyoming (choose Northern Hemisphere and uncheck Observation box) Penn. State (can be animated, click box)Summary of Potential Vorticity conservation (cyclogenesis)
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