EES 108 Class 02

EES 108 Class 02 - WeatherMapReview Temperature? 39F...

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Weather Map Review Temperature? 39°F Dewpoint? 38°F Cloud cover? 100% (8/8) of the sky covered by clouds Wind? 25 knots (23-27) from the Northwest Pressure? 986.5 mb, falling.  Pressure dropped 1.0 mb in the last 3 hours
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Weather Map Review Temperature? 24°F Dewpoint? 20°F Cloud cover? 50% (4/8) of the sky covered by clouds Wind? 30 knots (28-32) from the Southwest Pressure? 1011.1 mb  Pressure rose 0.4 mb in the last 3 hours
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Science of the Atmosphere Science is nothing else than the search to discover  unity in the wild variety of nature --- Jacob Bronowski Data : Observations Notice patterns Hypotheses patterns Test rules  (experiments, observations) Reject the ones that don’t work If they hold up, begin to trust them Theories : Organize individual rules (hypotheses) into  a larger system that fits together and explains big  phenomena
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Earth System
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Feedbacks
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Feedback
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Atmospheric Pressure What is air pressure? What determines the air pressure at a given  place?
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Thickness of the atmosphere Every time you go up 5.6 km (3.5 miles) the density drops by half
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Thickness of the atmosphere Every time you go up 5.6 km (3.5 miles) the density drops by half
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Composition (major gases only) Major components Fraction Weight N 2 : 78% 28 O 2 : 21% 32 Ar: 1% 40 Variable gases: CO 2 : 0.04% 44  Water vapor (H 2 O): 0.25% 18 Ozone (O 3 ) 0.01% 48 Aerosols
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EES 108 Class 02 - WeatherMapReview Temperature? 39F...

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