In a simple climate model for a planet, the incoming intensity is 400 W m-2 and the radiatedintensity is 300 W m-2 .planetreflectedincoming400 W m –2radiated300 W m –2The temperature of the planet is constant. What are the reflected intensity from the planetand the albedo of the planet?
Question
In a simple climate model for a planet, the incoming intensity is 400 W m-2 and the radiatedintensity is 300 W m-2 .planetreflectedincoming400 W m –2radiated300 W m –2The temperature of the planet is constant. What are the reflected intensity from the planetand the albedo of the planet?
Solution
The incoming intensity of the planet is 400 W/m^2 and the radiated intensity is 300 W/m^2.
The reflected intensity can be calculated by subtracting the radiated intensity from the incoming intensity.
Reflected Intensity = Incoming Intensity - Radiated Intensity Reflected Intensity = 400 W/m^2 - 300 W/m^2 Reflected Intensity = 100 W/m^2
The albedo of a planet is the measure of the reflectivity of the planet's surface. It is the ratio of the reflected radiation from the surface to the incident radiation upon it.
Albedo = Reflected Intensity / Incoming Intensity Albedo = 100 W/m^2 / 400 W/m^2 Albedo = 0.25 or 25%
So, the reflected intensity from the planet is 100 W/m^2 and the albedo of the planet is 0.25 or 25%.
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