Numerical questions. For this set of questions we are going to use our one layer model and its solution:

13. Using the graph of absorptivity as a function of wavelength (provided in class), estimate an average (within the range of the Earth's radiation, say between 10 and 30 mkm) emissivity of atmosphere at the ground. Make a sketch of the graph and describe how you make the estimation.

[1] AssumingSo=1.366x10^3 Wt/m^2, A=0.3 and using the value for e (found on previous step) calculate T_E.

[1] calculate the atmospheric temperature

b) [3] Let us increase the value of e (estimated in part a) by 0.1, (so new value

e₁=e +0.1) but keeping solar constant and albedo unchanged. What is the value of RF (in Wt/m2) created by this increase of emissivity?

[2] Based on the result found in the previous step what can you say about the energy fluxes for the surface of the Earth? Is the energy of Earth is expected to increase or decrease due to the increase of emissivity?

[1] So, the temperature of the Earth is expected: to increase or to decrease?

[1] Radiative Forcing created by increasing emissivity is: negative or positive?

[1] Calculate the value of T_E with the new value of emissivity (e₁). Does it confirm the previous step answer?

For this set of questions, we are going to use our one layer model and its solution: (1 - a) 4 71/4 1/4 (1-A)So 2 TE = (1) 40 (2 - 8 ) (1 - 8)TE EOTA TA 6= 5.67 x 10-8 W/m2K4 EOTA OTE TE 2 Question 13 (4 points) Using the graph of absorptivity as a function of wavelength: 2 28 8 8 Wavelength um 100+ 80 (b ) ABSORPTION % 60 ground level