Lab 2 Solar radiation in the atmosphere Objective: To learn what radiation is and how we can calculate radiation depending on various processes that influence the variability of radiation at different locations in the world and at different times of the year at the same location. Part 1: Radiation Laws Wien's Displacement Law describes the effect of a change in temperature on the wavelength of radiation emitted. Amax = C / T A max most of the energy is emitted at this wavelength (um) C = 2.897 x 10' jim K T = surface temperature in K (remember K = C + 273) Stefan-Boltzmann's Law describes the relationship between the amount of energy emitted and the surface temperature. E = GT4 E = amount of energy radiated in W m 2 6 = 5.67 x 10 Wm K4 T = surface temperature (K) la. Calculate the wavelength in which maximum intensity of energy is emitted from a snow surface with a temperature of -15. C (2)ANSWER +8 a significant figures Um 1b. Calculate the wavelength in which maximum intensity of energy is emitted from an for 29 asphalt surface with a temperature of 30 .C (2) ANSWER AC 1 significant figure fill in the um blanks 1c. Explain the difference in wavelength emission between these two surfaces. (2) use (/bedog) unless 2a. If incoming solar radiation (K)) is 450 W m , reflected solar radiation (K() is 410 W m" and incoming longwave radiation (LI) is 320 W m , determine the albedo (a = KT/ LT:1 W 2KI) and total net radiation, Q* (Wm") for the snow surface. Note you will first have to determine the amount of radiation emitted from the surface (LT in W m ) using the W2Stephan Boltzmann's Law. Then calculate total net radiation as (* = K* + [* (5) use a Signifiant figures in answer 2b. If incoming solar radiation (KI) is 450 W m', reflected solar radiation (KI) is 42 W m and incoming longwave radiation (LI) is 320 W m , determine the albedo (a = KT/ KI) and total net radiation, Q* (Wm ) for the asphalt surface. Note you will first have to determine the amount of radiation emitted from the surface (LT in Wm) using the for ab Stephan Boltzmann's Law. Then calculate total net radiation as Q* = K* + L*. (5)use 2 Significant fill in the blanks ? figures for Q* and Aldedo : unitless I significant figure Nm - 2 for L. L : 12 ( * . Wm - 2 F1 F2 80 F3 000 F4 F5 F6 DII F7 F8 F9 F10 F11