"Andrew Sarangan" wrote in message
om...

Adiabatic lapse rate is 1C/1"Hg for moist air (depending on moisture
content) and 3C/1"Hg for dry air. 2C/1"Hg is a representative average
for somewhat moist but unsaturated air.

No, moist but unsaturated air has an adiabatic lapse rate of 3 degC (i.e.
the unsaturated adiabatic lapse rate). The difference between that and
saturated comes not from the amount of water vapor in the air as a mixing of
properties, but from the latent heat produced when the water vapor
condenses, which only happens when the air becomes saturated. It's not a
progression, but a sharp difference when the water vapor starts to condense.

Julian Scarfe