Below is an atmospheric plot of land-solar radiation interaction. The plot also shows a hypothetical curve of the radiance measured from a target.Compute the percent reflectance for the target at 0.45 um (blue) wavelength. Guestimate your incoming energy at sea level and target reflected energy in Watts/m^2 from the plot below.This target hypothetically transmits 5% of the incoming energy at sea level. How much energy (Watts/m^2) does it absorb? Recall conservation of energy equation.Atmospheric attenuation coefficient is a multiplication factor, lets call it kl, that is multiplied by the incoming radiant energy (irradiance) at the top of the atmosphere (Itop_of_atmosphere) to derive the amount of irradiance reaching the target at the surface (Isurface):à Isurface = Itop_of_atmosphere * klFor example, if we have a kl = 0.5 then only 50% of the incoming irradiance at the top of the atmosphere reaches the surface at that wavelength. Using the equation and taking sea level to be the surface, compute k at wavelength = 0.45 um (guestimate your irradiance values from the plot below). Solar Irradiance Outside Atmosphere2000Solar Irradiance At Sea Level1000123Wavelength (um)Measured radiance of reflected energy from targetSolar Irradiance (W/m2/um)

Answered: Below is an atmospheric plot of…

9th Edition

ISBN:9780134746241

Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Chapter1: The Study Of Minerals

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Below is an atmospheric plot of land-solar radiation interaction. The plot also shows a hypothetical curve of the radiance measured from a target.

Compute the percent reflectance for the target at 0.45 um (blue) wavelength. Guestimate your incoming energy at sea level and target reflected energy in Watts/m^2 from the plot below.
This target hypothetically transmits 5% of the incoming energy at sea level. How much energy (Watts/m^2) does it absorb? Recall conservation of energy equation.
Atmospheric attenuation coefficient is a multiplication factor, lets call it k_l, that is multiplied by the incoming radiant energy (irradiance) at the top of the atmosphere (I_{top_of_atmosphere}) to derive the amount of irradiance reaching the target at the surface (I_surface):
à I_surface= I_{top_of_atmosphere}* k_l
For example, if we have a k_l = 0.5 then only 50% of the incoming irradiance at the top of the atmosphere reaches the surface at that wavelength. Using the equation and taking sea level to be the surface, compute k at wavelength = 0.45 um (guestimate your irradiance values from the plot below).