Humidity

Question 1

What is a super cooled water droplet
What temps are they usually found

Answer 1

Liquid water droplets below 0°C
Found in clouds with temp between 0°C and -15°C

Question 2

What is dew point
What happens to the water below the dew point

Answer 2

Temp air would have to be cooled to, to become saturated
Below dew point, water condensed out of air and onto surfaces

Question 3

What is absolute humidity
What unit is used to express it

Answer 3

Actual mass of water in given volume of air
g/m^3

Question 4

What is saturation content
What unit is used to express it

Answer 4

Mass of water a given volume of air can hold
g/m^3

Question 5

What is relative humidity
What happens to RH when air is cooled/heated
How do you calculate RH

Answer 5

Ratio of actual water vapour in air that it would hold if it were saturated
Cooled : RH increases; if cooled long enough RH reaches 100%
Heated : RH decreases
RH=(Absolute Humidity x 100)/Saturation Content

Question 6

What relation does RH have to Temp
Is RH at max/min at sunrise
Is RH at max/min at 1400-1500

Answer 6

RH is inversely proportional to temp
Sunrise = Max RH
1400-1500 = Min RH