** warm air is less dense(lighter) and thus rises
* as air rises in the atmosphere, it expands
* a parcel (or 'bubble') of air comes under less & less pressure as it rises &
* as a gas (air) expands, the molecular action (kinetic energy) decreases thus the T°
** cold air is more dense (heavier) and thus sinks
* as air sinks in the atmosphere, it compresses
* a parcel of air comes under more & more pressure as it sinks & thus is compressed
* as a gas (air) compresses, the molecular action (kinetic energy) increases thus the T°
SO, Expanding air = T° decrease Compressing air = T° increase
** BUT, the T° changes WITHOUT heat being added or subtracted.
*** this is Adiabatic Temperature Change: changing the T° of the air without adding
or subtracting heat
Simply the result of compressing the sir or allowing it to expand.
RESULT: ** Rising air in the atmosphere expands & cools.
** Sinking air in the atmosphere is compressed & warms.
*** Rate of Adiabatic Change:
* varies with humidity condition of air:
Dry (unsaturated) air vs. Wet (saturated) air
Dry Adiabatic Rate: (DAR or DALR)
When air is unsaturated,