ATMOSPHERE STRUCTURE BULK COMPOSITIon Atmospheric pressure(millibars-mb 02004006008001000 120 80 Temperature Pressur 100 Thermosphere Pressure units Mesopause 1atm=1013×106gcms2 Mesosphere 1 mbar 103 g cm-Is-2 g60 40a Stratopause 1 hPa= 10 g cm-ls2 40 Stratosphere. Ideal gas law Tropopause 20 (p R T)/Ma Troposphere 4048012 Temperature(°c) Source: Environmental Science, Cunningham, P. W and B. W Saigo, 200/ATMOSPHERE STRUCTURE & BULK COMPOSITION • Pressure units 1 atm = 1.013 x 106 g cm-1 s -2 1 mbar = 103 g cm-1 s -2 1 hPa = 103 g cm-1 s -2 • Ideal gas law p V =  Rg T p = ( Rg T)/Ma Source: Environmental Science, Cunningham, P. W. and B. W. Saigo, 2001