Atmospheric Energy Current Weather Energy Essentials Energy Balance
Atmospheric Energy Current Weather Energy Essentials Energy Balance in the Troposphere Latent Heat Transfer Temperature For Next Class: Read Chapter 4: pp. 95 -117
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Energy Pathways Figure 4. 1
Energy Pathways Insolation input All radiation received at Earth’s surface – direct and indirect Scattering Changing direction of light’s movement, without altering its wavelengths Refraction Change in speed and direction of light
Insolation at Earth’s Surface Figure 4. 2
Discussion What is albedo and why is it important?
Albedo Figure 4. 5
July and January Albedos Figure 4. 6
Heat Transfer Conduction Molecule-to-molecule transfer Convection Energy transferred by movement Advection Horizontally dominant movement Radiation Energy traveling through air or space
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Convection vs. Advection n Convection – vertical transfer of heat energy n Advection – horizontal transfer
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Discussion When does the highest temperature of a day typically occur and why?
Daily Radiation Curves Figure 4. 14
Surface Energy Budget Figure 4. 15
Simplified Surface Energy Balance NET R = +SW (insolation) –SW (reflection) +LW (infrared) –LW (infrared) Figure 4. 16
Radiation Budgets El Mirage, CA Pitt Meadows, BC Figure 4. 20
Latent Heat Transfer n Phase Changes of Water • Heat absorbed from environment during changes to higher energy states n melting, evaporation, sublimation • Heat released to environment during changes to lower energy states n © AMS freezing, condensation, deposition 24
680 cal/g required 540 -600 cal/g required 80 cal/g released 540 -600 cal/g released 680 cal/g released
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Discussion What is highest air temperature ever recorded? Where? Lowest temperature? Where? At what temperature are Celsius and Fahrenheit equal?
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