inversion layer

LITAir normally cools with height; the International Standard Atmosphere uses 6.5 K/km from 288.15 K at sea level. In a temperature inversion, a warm layer sits above cooler air. Rising smoke reaches air warmer than itself, loses its buoyancy and is trapped, as in the London smog of December 1952. The stratosphere is itself a vast inversion, warmed by ozone.

MODELSmoke parcels cool at the dry adiabatic rate (9.8 K/km) and stop where they become colder than the surroundings. Smoke leaves the stack 6–10 K warmer than the air (my choice). The inversion sits at 0.8–1.3 km with strength on the slider.

inversion +K release smoke

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