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The Greenhouse Effect and Global Warming , What is it? How does it occur?. Carl N. Drummond Dean, College of Arts and Sciences. Science Café, November 30, 2010. The Global Energy Balance. Energy from the Sun. Terrestrial Radiation. Sun: 6000K, Q = 3.87 x 10^26 W, S 0 = 1367 W/m^2.
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The Greenhouse Effect and Global Warming, What is it? How does it occur? Carl N. Drummond Dean, College of Arts and Sciences Science Café, November 30, 2010
The Global Energy Balance Energy from the Sun Terrestrial Radiation
The Sun is cool ! Infrared Ultraviolet 6000 K Max Planck, 1900 Intensity 5000 K 4000 K Wavelength
Solar Flux S0 = 1367 W/m^2 A = πr^2 Earth’s Incoming Solar Radiation SI = S0πr^2 / 4 πr^2 SI = S0 / 4 SI = 342 W/M^2 So what happens to all this energy?
The Global Energy Balance Albedo
Surface Albedo 0.7 0.3 Stratocumulus Cirrus
The Greenhouse Effect Has Nothing to do with Greenhouses Carbon Dioxide Water Vapor
Sun Earth Water Gap CO2 Greenhouse
Venus : 96% CO2, 92 bar S0 = 2632 W/m^2 Te = 230 K Ts = 760 K = 980°F GHE = 530 K 0.77 Earth: 0.007% CO2, 1 bar S0 = 1367 W/m^2 Te = 250 K Ts = 288 K = 58°F GHE = 38 K 0.30 Mars: 95 % CO2, 0.006 bar S0 = 589 W/m^2 Te = 220 K Ts = 230 K = - 45°F GHE = 10 K 0.24 0.12
Direct Measurements Glacial Ice Bubbles
Planting Trees Will Not Help So where will all the CO2 go?
The Triumvirate of the Global Carbon Cycle Jacques Joseph Ebelmen (1814 – 1852) Ecole des Mines Harold C. Urey (1893 – 1981) Univ. of Chicago Robert A. Berner (1935 – ) Yale
Thermal Expansion of Surface Sea Water (2 cm) • Melting of Alpine Glaciers (2.5 cm) • Melting of Greenland and Antarctic Ice Caps (2 cm)