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Surface Albedo Measurements at UNR 29 July 2013

Surface Albedo Measurements at UNR 29 July 2013. By Pat Arnott. Bryan steadies the albedo measuring device. Irradiance sensor (looks up). Radiance sensor (looks down). Computer to read spectrometer data. Spectrometers are at Dambar’s left hand. Spectral Albedo of Dead and Live Grass.

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Surface Albedo Measurements at UNR 29 July 2013

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  1. Surface Albedo Measurementsat UNR29 July 2013 By Pat Arnott

  2. Bryan steadies the albedo measuring device Irradiance sensor(looks up) Radiance sensor(looks down) Computer to read spectrometer data.Spectrometers are at Dambar’s left hand.

  3. Spectral Albedo of Dead and Live Grass Mixed greener grass has a peak at around 550 nm (green color). Mixed greener grass is likely taller and may cast more shadows, making it darker. Dead grass reflects more visible light (from 400 nm to 700 nm) but absorbsmore infrared (above 700 nm).

  4. Concrete and Red Painted Concrete Strong absorptionbelow 600 nm! Red painted concrete mayoverall absorb more lightthan unpainted concrete.Red painted concrete may be warmer than unpaintedconcrete.

  5. Concrete and Asphalt Comparison The spectral albedo of concrete is higher than that for asphalt. We would expect asphalt to be warmer than concrete on a sunny day.

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