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Important information about atmospheric gases

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Compound
Concentration
Source
Atmospheric Lifetime
Atmospheric Location
Sinks
Concern
Isoprene   0.1-2 ppbv   Forests, Vehicle emissions   2 hours   Troposphere   Oxidation   Greenhouse gas, Increases tropospheric O3  
🗑
PAN   Urban: 50-250 ppbv Rural: <5 ppbv   CxHy+NOx   3-10 days   Troposphere and Stratosphere   Thermal decomposition   Toxic, reservoir for NOx  
🗑
Benzene   370 µg/m3   Vehicle emissions, industrry   12 days   Troposphere   Oxidation by OH   Carcinogen  
🗑
NOx   Urban: 100-400 ppbv Rural: <5 ppbv   Combustion, Supersonic aircraft, Lightning, Biomass burning, Soils   1 day   Troposphere and Stratosphere   Formation of N2O5/HNO3 reservoirs   Urban pollution, Ozone depletion, Acid deposition  
🗑
ClONO2   0.1-1.6 ppbv   ClO+NO2+M -> ClONO2+M   4 days   Troposphere and Stratosphere   Decomposition on PSCs   Reservoir for Cland NOx  
🗑
CH4   1.7 ppmv   Vehicle emissions, Biomass burning, Animals, Landfills, Gas (hydrofracking), Termites, Wetlands   12 years   Troposphere and Stratosphere   Dissociation by Cl radical   Greenhouse gas  
🗑
SO2   10 ppt-1 ppb   Volcanic emissions, Photochemical, Anthropogenic   1 day   Troposphere   Deposition, Oxidation by OH   Smog, Acid deposition, Impairs visibility  
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CFC-12   500 pptv   Industry   100 years   Troposphere and Stratosphere   Photodissociation in Stratosphere   Greenhouse gas, Stratospheric ozone depletion  
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H2S   0.05-0.3 ppbv   Swamps, photochemical   1-2 days   Troposphere   Oxidation by OH   Acid deposition  
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N2O   319 ppbv   Agriculture emissions, Dentrification   120 years   Troposphere and Stratosphere   Photodissociation   Greenhouse Gas, Ozone depletion  
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O3   Trop: 10-500 ppbv Strat: 0.5-10 ppmv Urban: 50-150 ppbv Rural: <5 ppbv   Photochemical   Hours-days   Troposphere and Stratosphere   Photodissociation, Reaction with HOx, NOx, ClOx   Urban Pollution, acid deposition, greenhouse gas, toxic to humans and vegetation  
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CO2   360 ppmv   Combustion, Ocean   100 years   Troposphere and Stratosphere   Photosynthesis   Greenhouse gas  
🗑
CO   Urban: 10,000-30,000 ppbv Rural: <200 ppbv   Combustion/Industry, Oxidation, Biomass burning, Oceans, Vegetation   1 year   Troposphere and Stratosphere   Oxidation by OH, Soil Uptake   Toxic, Urban Pollution  
🗑


   

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