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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

GLOBAL WARMING

CE/AE/EnSci 524B

QUANTIFYING GLOBAL CLIMATE CHANGE

slide6

Heat balance factors in the atmosphere

Source: National Resources Defense Council

blackbody radiation
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
The electromagnetic spectrum

Progressively more heat is released at higher temperatures and wavelengths become shorter with higher temperatures

earth and solar radiation
Earth and solar radiation

Calculate the power emitted by Earth and peak wavelength for Sun and Earth

vibration energy imparted to co 2 molecules released as infrared
Vibration energy imparted to CO2 molecules – released as infrared

http://www.ucar.edu/learn/images/carbon.gif

slide28

Greenhouse

Gas Emissions

By Gas (1997)

slide31

US ENERGY

CONSUMPTION

BY ENERGY

SOURCE

slide35

SOURCES OF CH4

(farts and belches)

slide38
Quiz
  • http://yosemite.epa.gov/oar/globalwarming.nsf/content/impacts.html