User:Milton Beychok/Sandbox
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which, for the parameter values below, then becomes:
Given an air pollutant concentration at sea-level atmospheric pressure, the concentration at higher altitudes can be obtained from this equation:
where: | |
L | = atmospheric temperature lapse rate = 6.5 K/km |
---|---|
h | = altitude, km |
g | = Earth's surface gravitational acceleration = 9.80665 m/s2 |
M | = Molecular weight of air = 28.9644 g/mol |
R | = Universal gas constant = 8.314472 J/(mol • K) |
P 0 | = absolute atmospheric pressure at sea level (in any selected pressure units) |
P h | = absolute atmospheric pressure at altitude h (in the same pressure units as P 0) |
C | = Air pollutant concentration, in mass per unit volume at sea level atmospheric pressure P 0 and specified temperature T0 (commonly 288.15 K) |
C h | = Concentration, in mass per unit volume at altitude h and specified temperature T0 |