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Overview of Earth’s Heat-Trapping Gases

Overview of Earth’s Heat-Trapping Gases. Lesson 4. Electromagnetic Spectrum. http://9-4fordham.wikispaces.com/Electro+Magnetic+Spectrum+and+light. Earth’s Magnetosphere . The Earth’s Atmosphere (60 miles thick). http://www.grc.nasa.gov/WWW/k-12/airplane/atmosphere.html.

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Overview of Earth’s Heat-Trapping Gases

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  1. Overview of Earth’s Heat-Trapping Gases Lesson 4

  2. Electromagnetic Spectrum http://9-4fordham.wikispaces.com/Electro+Magnetic+Spectrum+and+light

  3. Earth’s Magnetosphere

  4. The Earth’s Atmosphere (60 miles thick) http://www.grc.nasa.gov/WWW/k-12/airplane/atmosphere.html

  5. Sun’s Emission Spectrum able to penetrate Earth’s atmosphere The blue line indicates the approximate intensity of radiation that penetrates Earth's atmosphere at wavelengths from the ultraviolet (UV) through the visible to the infrared. Light at low UVC wavelengths is completely absorbed by the atmospheric ozone layer, so organisms on Earth have developed no tolerance to it. http://www.nature.com/nature/journal/v441/n7091/fig_tab/441299a_F1.html

  6. What does this penetrating energy do to Earth? Being light, infrared travels through space at the speed of light. Matter is not space and the Earth’s atmosphere is obviously matter. Heat is a property of matter. The rate of transmission is slowed as this energy enters the atmosphere. Work is thereby done; so heat is created. Some atmospheric molecules are more sensitive to this energy than others based on their molecular shape and bonds. http://www.windows2universe.org/physical_science/chemistry/molecules_vibrate.html

  7. Earth’s atmosphere http://www.agci.org/classroom/atmosphere/index.php

  8. Earth’s Atmospheric Composition 99% 1% http://www.globalchange.umich.edu/globalchange1/current/lectures/Perry_Samson_lectures/evolution_atm/index.html

  9. What is a “Heat-Trapping Gas”? Objects that absorb all radiation incident upon them are called "blackbody" absorbers. The earth is close to being a black body absorber. Gases, on the other hand, are selective in their absorption characteristics. While many gases do not absorb radiation at all some selectively absorb only at certain wavelengths of energy. Those gases that are "selective absorbers" of solar energy are the gases we know as “heat-trapping gases”. http://www.globalchange.umich.edu/globalchange1/current/lectures/Perry_Samson_lectures/evolution_atm/index.html

  10. 2500 nm 3330 nm 5000 nm 10000 nm 1000000 nm http://www.elmhurst.edu/~chm/vchembook/images/irgreengas.JPEG

  11. http://www.elmhurst.edu/~chm/vchembook/images/irwater.JPEG

  12. http://www.elmhurst.edu/~chm/vchembook/images/irmethane.JPEG

  13. http://www.elmhurst.edu/~chm/vchembook/images/irN2O.JPEG

  14. Greenhouse gas ABSORBANCE (in white) http://en.wikipedia.org/wiki/File:Atmospheric.transmittance.IR.jpg

  15. Effect of Heat-Trapping Gases http://mrsdlovesscience.com/greenhouse/greenhouse.html

  16. CO2 levels (parts per million) over the past 10,000 years. Blue line from Taylor Dome ice cores (NOAA). Green line from Law Dome ice core (CDIAC). Red line from direct measurements at Mauna Loa, Hawaii (NOAA).

  17. This Is What Worries Many Scientists 0 http://www.realclimate.org/index.php/archives/2004/12/temperaturevariations-in-past-centuries-and-the-so-called-hockey-stick/

  18. Simplified Example of a Combustion Reaction

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