EES 108 Class 07a - Flow of heat Flow of heat What moves...

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Flow of heat
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Flow of heat What moves heat around in the lower atmosphere? Convection
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Temperature through the day When do we expect hottest temperature? Coldest? Why?
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Lag time Between maximum solar  intensity and maximum  temperature  
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Role of clouds Clouds  Increase albedo (cooling) Block light in the infrared window (warming) Clouds both heat and cool the earth. Which effect is largest? The devil is in the details.
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Different cloud types High clouds: Small albedo Don’t block heat from sun Absorb LW from below High altitude  = colder temperature Radiate little heat Warming Low clouds: Large albedo Blocks heat from sun Absorb LW from below Low altitude  = warmer temperature Radiate much heat Cooling
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Effect of low clouds
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Trees have similar effect
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Geography, clouds, and climate Summer monsoon: Clouds, rain Winter monsoon: Dry, clear Temperature Precipitation
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Factors affecting local temperature Latitude Altitude Land/Water contrasts Ocean Currents  Global circulation patterns  (Details in Chapter 8) Local conditions Topography (hills or flat) Trees, grass, sand, etc.
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