The Greenhouse Effect and Global Warming What is
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
En er gy f The Global Energy Balance ro m th e. S un n it o l a i tr Te s e rr ia d Ra
Sun: 6000 K, Q = 3. 87 x 10^26 W, S 0 = 1367 W/m^2
Ultraviolet Intensity The Sun is cool ! Infrared 6000 K 5000 K 4000 K Wavelength Max Planck, 1900
Solar Flux S 0 = 1367 W/m^2 A = πr^2 Earth’s Incoming Solar Radiation SI = S 0 πr^2 / 4 πr^2 SI = S 0 / 4 SI = 342 W/M^2 So what happens to all this energy?
The Global Energy Balance Albedo
Surface Albedo 0. 7 0. 3 Cirrus Stratocumulus
The Greenhouse Effect Has Nothing to do with Greenhouses Carbon Dioxide Water Vapor
Sun Earth Wa ter Ga p ouse CO h een 2 Gr
0. 77 Venus : 96% CO 2, 92 bar S 0 = 2632 W/m^2 Te = 230 K Ts = 760 K = 980°F GHE = 530 K Earth: 0. 007% CO 2, 1 bar S 0 = 1367 W/m^2 Te = 250 K Ts = 288 K = 58°F GHE = 38 K 0. 24 Mars: 95 % CO 2, 0. 006 bar S 0 = 589 W/m^2 Te = 220 K Ts = 230 K = - 45°F GHE = 10 K 0. 30 0. 12
So what are the facts?
Dir ect Me asu rem ent Glacial Ice Bubbles s
CH 2 O + O 2 → CO 2 + H 2 O
Planting Trees Will Not Help So where will all the CO 2 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
Greenland Ice = 7 m of global sea level
1) Thermal Expansion of Surface Sea Water (2 cm) 2) Melting of Alpine Glaciers (2. 5 cm) 3) Melting of Greenland Antarctic Ice Caps (2 cm)
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