EESB03H3 Lecture 2: Lecture 2 notes, EESB03
27 Feb 2020
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Learning goals: describe the radiative processes in the atmosphere, understand energy transfer, chapter 2,5 of meteorology today. Incoming solar radiation is reflected by clouds and earth. The effectiveness of clouds as a reflector, depends on surfaces the cloud thickness. The earth"s surface plays a smaller role. The albedo is the ratio of reflected radiation to incoming. The average albedo for the earth is 0. 4 radiation. Scattering: when incoming radiation encounters small particles the radiation is deflected in all direction, the amount of scattering is much higher for short. It is proportional to the inverse of the fourth power of the wavelength: 1/ 4, violet scatters more than red. Some of the longer wavelength are scattered green/blue light we see a composite so. More light is in the blue region than violet. As the sun approaches the horizon line, sunlight must traverse a greater distance through our atmosphere, and orange has a longer wavelength for.
