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ch09 - Jon Ahlquist Chapter 9 Wind Small-scale local...

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Jon Ahlquist 10/18/2006 MET1010 Intro to the Atmosphere 1 Chapter 9: Wind: Small-scale & local systems Scales of motion, turbulence Microscale sculpts the Earth Water waves excited by the wind Measuring surface and upper level winds Thermal circulations: sea breeze & monsoon Air flow over a lake Chinook Radar winds Monsoon and Santa Ana in SW United States Dust devils Wind power Scales of motion (pp. 250-251) Atmospheric disturbances exist in all sizes Table 9. 1, p. 223: Bigger things last longer Week or more Planetary “Long waves” Days - week 1000’s of km H & L areas on TV weather Days - week 100’s of km Tropical storms, hurricanes Hours 10’s of km to 100’s of km Land/sea breeze, chinook, Santa Ana Minutes to hours Meters to kilometers Dust devils, tornadoes, thunderstorms Sec to min cm to meters Small eddies Life Span Size What