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Spectral Reflectance Asphalt & Concrete R l =1-A l

Spectral Reflectance Asphalt & Concrete R l =1-A l. Green Veg & Astroturf R l =1-A l. Green Veg & Fall Colors R l =1-A l. Plant Pigments. So, what absorbs in functioning leaves?. (Reflectance  = 1.0 - Absorption  . Snow, Clouds, Water, Soil, & Green Veg. R l =1-A l.

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Spectral Reflectance Asphalt & Concrete R l =1-A l

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  1. Spectral ReflectanceAsphalt & Concrete Rl=1-Al

  2. Green Veg & Astroturf Rl=1-Al

  3. Green Veg & Fall ColorsRl=1-Al

  4. Plant Pigments So, what absorbs in functioning leaves? (Reflectance = 1.0 - Absorption

  5. Snow, Clouds, Water, Soil, & Green Veg Rl=1-Al

  6. Snow, Clouds, Water, Soil, & Green Veg Rl=1-Al

  7. Basic Interactions between Electromagnetic Energy and the Earth’s Surface Rl=1-Al

  8. Specular versus Diffuse Reflectance Rl=1-Al

  9. Bidirectional Reflectance ofBlack Spruce & Jack Pine no shadows in shadow Rl=1-Al

  10. Bidirectional Reflectance ofBlack Spruce & Jack Pine no shadows in shadow Rl=1-Al

  11. Bidirectional Reflectance ofBlack Spruce & Jack Pine no shadows in shadow Rl=1-Al

  12. Total Energy Flux: M = sT4 (w/m2 s = 5.67x10-8 w/m2*K4 ~1370 watts/m2

  13. 92%

  14. Incoming/Outgoing max = 2898/5880 = 0.49 mm max = 9.7 mm

  15. Exoatmospheric Solar Irradiancel atmospheric limb Solar Irradiancel at Earth’s Surface

  16. Spectral Exitance

  17. Earth’s reflective (sun) & emissive (reradiation) regions

  18. Inverse distance & intensity

  19. Inverse distance & intensity

  20. Homework Assignment 4: 9/30/2003 The distance from the center of the sun to its photosphere is 6.96 x 108 m. The mean distance from the center of the sun to the earth is 1.5 x 1011 m. Assume the sun’s mean temperature to be 5880 K, the earth’s to be 288 K, and that both are perfect radiators. (A). What is the total energy which the sun radiates? (w/m2) (B). What is the total energy which the earth radiates? (w/m2) (C). Calculate the sun’s energy received at the top of the earth’s atmosphere in W m-2. (w/m2) (D). Calculate the energy of the earth received at the surface of the sun’s photosphere. (w/m2) (E). Calculate the sun’s energy received at the top of Venus’ and Mars’ atmospheres. (w/m2) Assume an albedo of 0.3 for Venus, Earth, and Mars. (F). Calcuate the total watts absorbed by each planet.

  21. Sunday at 5 pm Hotel Washington’s roof bar

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