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ch08_rev - ± What is the pressure gradient force In what...

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Jon Ahlquist 10/5/2006 MET1010 Intro to the Atmosphere 1 Chapter 8 Review: Air Pressure, Forces and Wind ± What is a mercury barometer? Aneroid barometer? How do they work? ± What is the average sea level pressure in inches of mercury? Millibars ? Hectopascals ? ± By roughly what percent do you have to change the surface pressure to get a “large” pressure change? Answer: Weather rarely changes the surface pressure by more than a few percent. ± How does temperature of an air column affect what the air pressure will be several kilometers above the surface? Barometers and Pressure ± Why can a barometer be used as an altimeter? (Even planes with GPS use a barometric altimeter as an independent piece of position information.) ± What does it mean to adjust a surface pressure reading to sea level? ± Why are surface pressure readings adjusted to sea level? ± What is an isobar? ± What is a trough? What is a ridge? Forces on the Air ± What is the definition of pressure gradient?
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Unformatted text preview: ± What is the pressure gradient force? In what direction does it push? ± What is the Coriolis force? ± What is a Foucault pendulum? ± Near what latitudes is the sideways push of the Coriolis force small? Near what latitudes is it large? ± Does the Coriolis force push toward the right or left in the Northern Hemisphere? Wind Relative to Forces ± What is the wind direction relative to the location of high and low pressure? ± What is the direction of flow around a low in the Northern Hemisphere? Around a high? ± If isobars are close, what will the wind speed be? ± What does friction do to the wind speed? ± What does friction do to the wind direction? Why? ± What are convergence and divergence? ± Do you expect convergence into or divergence out of a low at the surface? Rising or sinking air above a surface low? ± For a surface high, convergence or divergence? Rising or sinking air above it?...
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