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Radiation and the Earth’s Atmosphere

This resource explores the intricate relationship between radiation and the Earth's atmosphere, detailing how the atmosphere regulates long-term climate, short-term weather, and temperature. It explains the energy dynamics from the sun, the movement of Earth, and the atmospheric composition. With emphasis on recent industrial impacts on this ancient system, the piece also examines temperature concepts and the unique characteristics of the thermosphere. Engage in measuring solar energy at ground level to deepen your understanding of atmospheric interactions.

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Radiation and the Earth’s Atmosphere

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  1. Radiation and the Earth’s Atmosphere http://telstar.ote.cmu.edu/environ/m3/s2/index.shtml

  2. Ask not what your atmosphere can do for you….. • The atmosphere maintains the long-term climate, the short-term weather, and the temperature conditions on Earth. • Several factors involved… • Energy (from the sun produces the movements or currents) • Earth's movement relative to the sun • components of the atmosphere • components of Earth's surface

  3. The Earth Sun System

  4. The atmosphere can change • In the last century especially, this system--which evolved over billions of years--has been subject to rapid changes due to industrial activities increasing at unprecedented rates.

  5. Structure of the Atmosphere • An ocean of air • Temperature changes • Stable layers

  6. The Thermosphere dilemna How can 1,ooo degress feel cool?? • What is heat? What is temperature?

  7. Heat and Temperaure • Heat is the thermal energy that is transferred from a warmer object to a cooler object. • Temperature a number that is related to the average kinetic energy of the molecules • Thermosphere: Very few molecules, Moving very fast. They have high temperature (I.e. KE), but not enough of them to transfer much heat (I.e warm up something)

  8. Sun’s emission spectrum • The range of wavelengths that fall on top of the Earth's atmosphere Minor amounts of X-ray. Measured as 1370-1380 watts/m2

  9. How much Energy gets through?

  10. Molecules responsible for absorption

  11. ‘Windows’ of Opportunity

  12. The Solar Constant

  13. The Energy Lab • Problem: How much energy arrives in our school yard from Sun? • What to do: Compare our ground level measurement with the 1370 W/m2 at the top of the atmosphere.

  14. Measuring Energy from the Sun • Lab: • http://csc.gallaudet.edu/soarhigh/SHMA330.HTM • Photos: http://sci.gallaudet.edu/Mary/classpics01/elab20014th.html

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