1. Conversations with the Earth Tom Burbine tburbine@framingham.edu

2. 11) Equate the energy emitted by the Earth and the energy absorbed by the Earth to determine the energy balance equation

3.  T 4 = (S/4)(1-A)

4. 12) From the Planetary Energy Balance Formula, calculate what the temperature is equal to?

5. T = [(S/4  )(1-A)] 1/4

6. 13) Using the Planetary Energy Balance Equation, what should be the temperature of the Earth? S = 1366 W/m 2 A = 0.30  = 5.67 x 10 -8 W/(m 2 K 4 )

7. 14) The mean surface temperature of the Earth is 288 K, why is the calculated temperature from the Energy Balance equation lower than the real temperature?

8. Quiz on Thursday F =  T 4 How the energy balance equation works The solar flux varies inversely by the square of the distance (1/d 2 ) Albedo Convert Kelvin to Celsius Blackbody curves Wavelength of Maximum intensity of the blackbody curve peak  1____ T (K)

9. http://www.hulu.com/watch/23343/scientific- american-frontiers-hot-planet-%E2%80%93-cold- comforthttp://www.hulu.com/watch/23343/scientific- american-frontiers-hot-planet-%E2%80%93-cold- comfort

10. Any Questions?