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22.2 Solar Energy and the Atmosphere

22.2 Solar Energy and the Atmosphere. What happens to incoming solar radiation?. Scattered Reflected Absorbed. Scattering. Clouds, dust, and water vapor scatter sunlight. Causes rays to travel in all directions without changing wavelength. Makes sky appear blue!.

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22.2 Solar Energy and the Atmosphere

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  1. 22.2 Solar Energy and the Atmosphere

  2. What happens to incoming solar radiation? Scattered Reflected Absorbed

  3. Scattering • Clouds, dust, and water vapor scatter sunlight. • Causes rays to travel in all directions without changing wavelength. • Makes sky appear blue!

  4. Why is the sky red/orange at sunrise and sunset? • Sunlight travels through a longer path in the atmosphere. • Blue light gets scattered away first (short wavelength) and red is left (long wavelength).

  5. Reflection • Albedo- the fraction of solar radiation that is reflected by a surface.

  6. Absorption 3. Some escapes back to space 1. Short wavelength IR comes in 4. Some IR is absorbed by gasses in atmosphere (CO2, Water Vapor, NOx, CH4 )and sends it back to earth 2. Earth absorbs short wavelength IR and readmits it as a longer wavelength IR

  7. Global Warming

  8. What causes changes in temperature? 1. Time of Day • Warmest hours of day are mid to late afternoon. • Earth needs time to absorb sunlight and reradiate it as heat.

  9. 2. Latitude 3. Season More direct rays equal warmer temperatures

  10. 4. Amount of Water Vapor • Mountains are warm during day but cold at night due to thinner air with less water vapor • Deserts are warm during day and cold at night

  11. 5. Located near water 6. Wind Patterns Land that gets a breeze from the ocean will be cooler than a breeze from over land • Have more moderate temperatures. • Cooler during day and warmer at night.

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