Solar and Terrestrial radiation Unit #2,3,4

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  1. Albedo
    • The reflectivity of a substance, usually expressed as a percentage of
    • the incident radiation reflected
  2. Aphelion
    The point in the orbit of a planet that is farthest from the Sun
  3. Atmospheric Window
    • Refers to the fact that the troposphere is transparent (ie. does not
    • absorb) to terrestrial radiation between 8 – 11 micrometers in length
  4. Blackbody
    • A material that is able to absorb 100 percent of the radiation that
    • strikes it.
  5. Diffuse (solar) radiation
    • Solar energy is scattered and reflected in the atmosphere and reaches
    • Earth’s surface in the form of diffuse blue light from the sky
  6. Equinox
    • The point in time when the vertical rays of the Sun are
    • striking the equator. In the Northern Hemisphere, March 20//21 is the vernal or
    • spring equinox and September 22//23 is the autumnal equinox. Lengths of
    • daylight and darkness are equal at all latitudes at equinox
  7. Greenhouse Effect
    • : The transmission of shortwave solar radiation by the atmosphere coupled
    • with the selective absorption of longer-wavelength terrestrial radiation,
    • especially by water vapor and carbon dioxide resulting in warming of the
    • atmosphere
  8. Infrared Radiation
    Radiation witha wavelength from 0.7- 200 micrometeres
  9. Inclination (tilt) of axis
    • The tilt of Earth’s axis from the perpendicular to the plane of Earth’s
    • orbit (plane of ecliptic). Currently, the inclination is about 23 1/2°
  10. Near Infrared
    • : pertaining
    • to or being in the infrared spectrum that is closest to visible light; it is
    • used for studying red dwarfs, red giants, and other celestial objects.
  11. Perihelion
    The point in the orbit of a planet closest to the Sun
  12. Radiation
    • The wavelike energy emitted by any substance that possesses heat. This
    • energy travels through space at 300,000 kilometers per second (the speed of
    • light)
  13. Reflection
    • The angle of incidence (incoming rays) is equal to the angle of reflection
    • (outgoing rays)
  14. Scattering
    scattering of light, other electromagnetic radiation, or particles.
  15. Solstice
    • The point in time when the vertical rays of the sun are striking either
    • rthe tropic of cancer ( summer solstice in the Northern Hemisphere) or the
    • tropic of Capricorn (winter solstice in Northern Hemisphere). Solstice
    • represents the longest or shortest day (length of daylight) of the year
  16. Tropic of Cancer
    • The parallel of latitude, 23 1/2° north latitude, marking the northern
    • limit of the Sun’s vertical rays
  17. Tropic of Capricorn
    • The parallel of latitude, 23
    • 1/2° South latitude, marking the Southern limit of the Sun’s vertical
    • rays
  18. Visible Radiation
    Radiation with a wavelength from 0.4- 0.7 micrometers
  19. UV Radiation
    Radiation with a wavelength from 0.2 – 0.4 micrometers

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Solar and Terrestrial radiation Unit #2,3,4
2011-02-09 01:45:00
Intro Atmosphere

Intro to the Atmosphere
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