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GLOBAL WARMING

GLOBAL WARMING CE/AE/EnSci 524B QUANTIFYING GLOBAL CLIMATE CHANGE Are humans the culprit? ? = Temperatures over the last 1000 years Temperature change in North America Water precipitation in North America Heat balance factors in the atmosphere

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GLOBAL WARMING

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  1. GLOBAL WARMING CE/AE/EnSci 524B QUANTIFYING GLOBAL CLIMATE CHANGE

  2. Are humans the culprit? ? =

  3. Temperatures over the last 1000 years

  4. Temperature change in North America

  5. Water precipitation in North America

  6. Heat balance factors in the atmosphere Source: National Resources Defense Council

  7. The Greenhouse Effect

  8. Heat balance over Earth

  9. Blackbody radiation Both the Sun and Earth emit radiation as a function of temperature, according to the Stefan-Boltzmann Law (derived from Plack’s Law): E = σAT4

  10. The electromagnetic spectrum Progressively more heat is released at higher temperatures and wavelengths become shorter with higher temperatures

  11. Maximum intensity at a temperature

  12. Earth and solar radiation Calculate the power emitted by Earth and peak wavelength for Sun and Earth

  13. Solar Spectrum

  14. The real solar spectrum

  15. Screening by the atmosphere

  16. Vibration energy imparted to CO2 molecules – released as infrared http://www.ucar.edu/learn/images/carbon.gif

  17. Global trends in major greenhouse gases

  18. The most important greenhouse gas - water

  19. Climate change impacts

  20. SOURCES OF GREENHOUSE GASES

  21. Sources of greenhouse gases

  22. Methane Quantities Released by Different Sources in Tg

  23. Anthropogenic Methane Sources

  24. Anthropogenic Methane Sources

  25. Greenhouse Gas Emissions By Gas (1997)

  26. US Greenhouse Gas Emissions /capita & /$ GDP

  27. Sources of Gas (1997)

  28. US ENERGY CONSUMPTION BY ENERGY SOURCE

  29. US ENERGY CONSUMPTION (Quadrillion BTU)

  30. CO2 EMISSIONS From FOSSIL FUEL COMBUSTION

  31. END USE SECTOR EMISSIONS OF CO2 FROM FOSSIL FUEL

  32. SOURCES OF CH4 (farts and belches)

  33. SOURCES OF N2O

  34. SOURCES OF HFCs, PCFs and SF6

  35. Quiz • http://yosemite.epa.gov/oar/globalwarming.nsf/content/impacts.html

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