### 12 terms by Hannah0772

#### Study  only

Flashcards Flashcards

Scatter Scatter

Scatter Scatter

## Create a new folder

Lecture #11

term for processes in which no heat energy is added or removed, but in which the temperature changes

rises

sinks

### as a parcel of air rises

-it expands (volume changes)
-it comes under less and less pressure as it rises in the atmosphere and thus expands
-as the air expands, the molecular action (kinectic energy) decreases and thus the temperature decreases

### expanding air

= temperature decreases

### compressing air

= temperature increases

changing the temperature of the air without adding or subtracting heat (simply the result of compressing the air or allowing it to expand)

### P (mb) = T ( ° K) x p (kg/m3) x C (2.87)

at the surface as temperature decreases, density and pressure increases; as the temperature increases, air density and pressure decreases

the rate at which the air temperature changes as it rises or falls through the atmosphere

### dry adiabatic rate (DAR or DALR)

-when air is unsaturated (air temperature > dew point temperature; RH < 100% )
-the DAR is a constant rater of 1°C/100m or 10°C/1000m
-rising air cools at 1°C/100m (10°C/1000m)
-falling air warms at 1°C/100m (10°C/1000m)

### wet or saturated adiabatic rate (SAR or SALR)

-when the air is saturated; air temperature = dew point temperature; RH = 100%
-the SAR is not a constant rate but a variable rate: 5°-9°C/100m

### condensation level

height at which condensation occurs; where cloud formation begins (usually at the bottom of a cloud mass)

Example: