GEOG 1040H Lecture Notes - Lecture 2: Shortwave Radio, Negative Number, Rayleigh Scattering
Document Summary
Ionosphere absorbs: gamma rays, x rays, some uv rays. Atmospheric absorption of electromagnetic radiation: ozonsphere is part of the stratosphere. Rayleigh scattering: gas molecules small compared to wavelength of incident of radiation, the shorter the wavelength, the smaller the denominator gets, 10x more blue light scatted than red. Late evening: the pathlength is so long that blue light becomes dis. Mie scattering: clouds, pollution and water droplets are of a similar size to the wavelength of all visible radiation, no wavelengths preferentially scatter so sky is grey. Solar radiation flows: 31% is radiation directly from the sun, 22% have bounce around the atmosphere. Energy pathways: the atmosphere and ground surface heat up, transfer of energy from the earth to the atmosphere- long wave radiation. Because asphalt is not reflecting much energy, its absorbing it. When you don"t reflect, you will absorb, and when you absorb, you heat up.
