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11 Cards in this Set
- Front
- Back
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troposphere
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-first region
-temp decreases w/ altitude; convection -sea level to 8/16km |
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stratosphere
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-second region
-temp increases w/ altitude; less convection, slow vertical mixing -8/16km to 50km |
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mesosphere
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-third region
-50km to 85km -temp decreases with altitude? |
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thermosphere
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-fourth region
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ozone
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-peak concentration 30 km (stratosphere)
-absorbs UV (240-320nm) |
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Chapman Mechanism
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-uses equations 1-4 in pure oxygen atmosphere
-assumes [O] and [O3] steady state -predicts [O3] high -underestimates destruction of ozone |
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HOx cycle
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-15% ozone removal
-excited state O reacts with CH4 -> OH + CH3 -OH helps transfer O from O3 to O -net: O + O3 -> 2O2 |
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NOx cycle
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-60/70% ozone removal
-NO helps transfer O from O3 to O -NO comes from N2O from bacteria, rising -N2O dissociates to produce O(1D), O(1D) reacts with N2O to make NO -NO2 + OH -> HNO3 (loss) |
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ClOx cycle
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-Cl helps transfer O from O3 to O
-removal: Cl + CH4 -> HCl + CH3 -can come from CFC's |
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Montreal Protocol
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-ban on CFC's
-Molina, Rowland |
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Ozone Hole
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-PSC
-Polar Vortex -ClONO2 and HCl condense on PSC, produce Cl2 -Cl2 photodissociates to Cl |
