Temperature changes occuring without the addition
or subtraction of heat are called Adiabatic temperature changes
General tipThis is different from
latent heat which changes state of a substance without altering temperature.
Environmental Lapse Rate
The decrease in temperature of the whole atmosphere
as we ascend high.The average rate of decrease is 6.5o
C/1000m.In other words
every 1000m increase in height temperature drops
Dry Adiabatic Lapse Rate
decrease in temperature of air parcels
height.The rate of decrease is 9.8o
The air is dry upon the fact that it has not reached saturation or has not condensed.
Saturated(wet) Adiabatic Lapse Rate
When an air parcel condense it continue rising beyond the condensation level, but this time the rate of cooling drops to 5o C/1000m
due to latent heat released during condensation.