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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 CE/AE/EnSci 524B QUANTIFYING GLOBAL CLIMATE CHANGE
Heat balance factors in the atmosphere Source: National Resources Defense Council
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
The electromagnetic spectrum Progressively more heat is released at higher temperatures and wavelengths become shorter with higher temperatures
Earth and solar radiation Calculate the power emitted by Earth and peak wavelength for Sun and Earth
Vibration energy imparted to CO2 molecules – released as infrared http://www.ucar.edu/learn/images/carbon.gif
Greenhouse Gas Emissions By Gas (1997)
US ENERGY CONSUMPTION BY ENERGY SOURCE
SOURCES OF CH4 (farts and belches)
Quiz • http://yosemite.epa.gov/oar/globalwarming.nsf/content/impacts.html