1.1 Composition of air and vertical stratification Minor components of clean air Atmospheric stratification Pressure(mb) 0 200 400600800 10001200 Gas % 100000 ppm Thermosphere H20 0~7 90000 C02 80000 0.032 CH4 70000 1.5 Mesosphere co 60000 0.1 Stratopause 50000 03 0.02 40000 NH3 0.01 Stratosphere 30000 NO2 0.001 20000 S02 0.0002 Tropopause 10000 H2S 0.0002 Troposphere 0 100 -80 60 -40 -20 0 20 Temperature(C)Gas % ppm H2O 0~7 CO2 0.032 CH4 1.5 CO 0.1 O3 0.02 NH3 0.01 NO2 0.001 SO2 0.0002 H2S 0.0002 Minor components of clean air Atmospheric stratification 1.1 Composition of air and vertical stratification