GEOS 212 1st Edition Lecture 14Outline of Last Lecture - Atmosphere also transports heat (with water vapor) = 20% of heat moved toward poles- Atmosphere model explains weather: High versus Low pressure weather prediction (see map)- Atmosphere also creates wind waves: low wind = small waves, high wind = tall waves- But can have waves and no wind = magic of waves travel long distances! Pattern of atmosphere motion today = correct?- Pattern of wind today = correct? - Pattern of wave height and direction correct?- Early explorersOutline of Current Lecture: Wind, Waves, and SurfingLECTURE 14 OUTLINE (waves & surfing – 5 March 2015) - Review Atmospheric - Circulation Model for weather prediction & wind belts, - Review wind velocity, and wave height in real world - Big Bad Table for wind waves Importance of fetch, duration, and Fully Developed Sea Why wavesrarely >50 ft? Why waves never move away from shore? - Why do waves break? - Pattern of wave motion in deep water - Pattern of waves along a shoreline - Mechanics of surfing- How calculate when a set of waves will arrive at a beachThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- Important new term is set velocity o speed of a set of waves = half of the speed of the individual wave wind speed x 0.57 = wave speed 50 mph wind speed x 0.57 28 mph wave speed o But set of waves travels at half of wave speed (set velocity) 28 mph wave speed x 0.50 14 mph set velocity Velocity = Distance / Time Time = Distance / Velocity Time = 1400 miles / 14 mph = 100 hours = 4 days!Current
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