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Atmospheric Air Pollutant Dispersion
courses.washington.eduAtmospheric Air Vertical Stability • Adiabatic vertical air movement causes a change in pressure and temperature: – dT/dz = g/C p = γ d (dry adiabatic lapse rate) γ d = 9.8 K/km--Stable lapse rate: γ< γ d – Unstable lapse rate: γ> γ d 1000 ft 5.4F 1000 meters 9.76 K ΔZ ΔT Altitude ΔTemp Lapse Rate Dry Adiabatic o = = = Δ =