446_01c_test4

446_01c_test4 - most applicable, and why? E 0.1 2 3 4 5 6 7...

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METR 446 Test # 4 Name: December 7, 2001 1) (10 pts) Describe in words what flux transmittance is. 2) (5 pts) To derive an expression for the equilibrium ozone number density, we assumed that some of the reactions taking place in the stratosphere were much faster than others. Which of the following reactions did we assume proceeded very quickly, and which did we assume were relatively slow? O + O 2 + M Æ O 3 + M (a) O 3 + O Æ 2O 2 ( b ) O 2 + h ν Æ 2O (c) O 3 + h ν Æ O 2 + O (d) 3) (10 pts) At what time of year is the stratospheric “ozone hole” over Antarctica most pronounced, and why?
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4) (10 pts) If the equilibrium ozone number density is proportional to the product of the number density of molecular oxygen and the square root of the number density of all gas molecules (M), why is it greatest in the stratosphere where the number density of molecular oxygen and M are much lower than near the ground? 5) (15 pts) For which of the absorption spectra shown below would the use of flux emissivity be
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Unformatted text preview: most applicable, and why? E 0.1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 10 2 3 ( m) 250 K 300 K a CO 2 O 3 6) Calculate the net irradiance at 850 mbar for the given sounding data assuming that the ground and clouds (when considered) behave as black-bodies, and that the temperature of the ground is the same as the temperature of the air just above it, a. (15 pts) neglecting the air in between the ground and cloud at ~700 mbar, and b. (35 pts) neglecting the cloud at ~700 mbar, but considering the water vapor present in the three ~50 mbar layers of the atmosphere above and below 850 mbar. P (mbar) T ( o C) w (g/kg) T avg ( o C) w avg (g/kg) 997 17.0 11.9 19.0 6.1 950 18.6 5.3 18.0 10.3 900 16.0 10.9 14.2 10.3 850 12.4 9.9 10.7 9.1 800 8.9 8.3 7.9 7.2 750 7.0 7.7 5.1 7.4 700 3.4 6.9...
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This test prep was uploaded on 04/02/2008 for the course ATMO 446 taught by Professor Brooks during the Spring '07 term at Texas A&M.

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446_01c_test4 - most applicable, and why? E 0.1 2 3 4 5 6 7...

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