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CH3041
STEADY STATE
Fluxes (fluxin = emission
/ time, eg. Ton / d)
• Most gases in the atmosphere are in
steady state not in chemical equilibrium.
steady state not in chemical equilibrium.
Fluxin = Fluxout = A / t
A =
total amount of gas in the atmosphere
t
= residence time of gas in
the atmosphere
= average lifetime
of a gas molecule
• A gas with a long residence time will have
time to mix well and will show a constant
concentration around the globe.
time to mix well and will show a constant
concentration around the globe.
• They will accumulate eg. CFC-12 t 110 yrs
