Adiabatic Cooling-Warming
30C 14C
20C 12C
10C 10C
Dew point
decreases with height at
a rate of 2oC/km b/c DP
varies less with Pressure
than Temp.
The rate
is much less than
cooling rate for air.
Thus,
unsaturated air can become
saturated IF it rises
far enough.
Red=Temperature
Blue=Dew Point
Ahrens, Fig 5.2