GEOG 1290 Lecture Notes - Lecture 5: Latent Heat, Sensible Heat, Sea Salt
14 Apr 2016
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Document Summary
Energy emitted by all objects e. g. , heat, light. Unit of measurement is the micrometer (a millionth of a meter or 10-6) Very short wavelengths in nanometers (a one thousandth of a m or 10-9) nm. Short wavelength includes gamma rays and x-rays. Ultraviolet radiation 10 nm to 400 nm (0. 4 m) Visible radiation extends from 0. 4 to 0. 7 m (400 700 nm) Short-wave infrared - 1. 2 to 3. 0 m. Middle infrared - 3. 0 - 6. 0 m. Thermal infrared - 6. 0 - 13 m. Most heat lies between 8 - 12 m. Everything above -273 c (=absolute zero, 0 kelvin) emits radiation. The warmer the object, the shorter the wavelength. The warmer the object, the greater amount of radiation emitted. Average size star heated by nuclear reactions. Energy travels outwards (no heat lost but spread out) Solar constant - rate of incoming energy outside the atmosphere. 1370 watts per square meter (w m-2)
