19 - These parallels represent special points where the...

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Electromagnetic energy from the sun l Shortwave (SW) solar radiation l Gamma l X-rays l Ultraviolet (UV) radiation l Visible light l Near infrared (IR) l Longwave (LW) terrestrial radiation l Thermal Infrared (IR) l Microwaves l TV and radio waves l Topics: l Sun Angle, l Duration l Insolation l Insolation (incoming solar radiation) l Main source of energy on our planet l Seasonal variations in temperature due primarily to fluctuations in insolation l Direct rays l Oblique rays Earth has seasons because of the tilt of the axis. Axis aims toward Polaris (North Star) Axis tilted at an angle of 23 ½ ° from a right angle to plane of the ecliptic
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Unformatted text preview: These parallels represent special points where the Suns rays strike the Earth. Incoming Solar Radiation- Solar Radiation intercepted at the surface of the earth. Solar Energy that strikes a location nearly vertical is more intense and is spread over less area than an equal amount that strikes the surface at an oblique angle. Atmospheric gases interact with solar energy and diminish the insolation that arrives at the surface. Oblique rays pass through the atmosphere at a greater distance so more insolation will be lost in the process....
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