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Atmo Homework #4

# Atmo Homework #4 - b As the morning wears down and...

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Sean Vanderwall Professor Ward Homework #4 March 7, 2007 Cloud and Stability Problems: 1. a. i. T=65°F and RH=97% If T=65°F, then U s =13.38 U = RH x U s = .97 x 13.38 U=12.98 ii. T=35°F and RH=80% If T=35°F, then U s =4.33 U = RH x U s = .80 x 4.33 U=3.46 b. i. Average Temperature = 50°F Average RH = 88.5% ii. A fog will not form because the Relative Humidity is not at 100%. With the air not being completely humid, there is no chance for enough water to evaporate into the air for it to condense into a thick enough air parcel.

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2. a. Fog forms when warm, moist air comes into contact with the much colder coastal waters because the air directly above the cold coastal waters is also cold. Since warm air rises above colder air, there is a new rising motion of some air, while the rest of the well off-shore air begins to become cooled by the colder waters. This causes fog to begin to form.
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Unformatted text preview: b. As the morning wears down and transfers over into the afternoon, rays of sunlight begin to take an effect on the formation and retention of clouds and fog. The solar rays penetrate the clouds and fog and begin to warm the ground. The warmer ground surface will in turn warm up the air and thus cause the deformation of fog. It would be probable that the dissipation of the fog would happen from the bottom up since the source of heat is not so much the sun, but instead the ground that is causing the increase in temperature. 3. a. Altitude Parcel Temperature Parcel Dew Point Temperature Saturated? 4000m-7°F-7°F Yes 3000m-1°F-1°F Yes 2000m 5°F 5°F Yes 1000m 15°F 5°F No 0m 25°F 5°F No b. Altitude Parcel Temperature Parcel Dew Point Temperature Saturated? 4000m 3000m 2000m 1000m 0m...
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