Download Relative humidity and dew point

RELATIVE HUMIDITY AND
DEW POINT (ELT 2, 3, 4)
LAYERS OF ATMOSPHERE
Thermosphere:
• Temps increase
w/height
• No well-defined
upper limit
Mesosphere:
• Temps decrease w/
height
• Meteors
Stratosphere:
• Temps increase
w/height
• Ozone layer
Troposphere:
• Temps decrease
w/height
• Weather occurs
RELATIVE HUMIDITY
the amount of water vapor in
the air compared to what the air
can "hold" at that
temperature represented as %
Warm
air holds more vapor,
cold air holds less vapor
100%
= saturation, 100%+
vapor condenses into liquid
(clouds, fog, dew)
DEW POINT
Represented
as temp (°F/C)
The
temperature at which
air reaches 100% humidity
(saturation)
Higher
the dew point, the
more moisture in the air (the
more “sticky” if feels)
CLOUD FORMATION
The
sun heats up the air (and water
vapor in the air)radiation
This
causes air to rise (low pressure)
convection
Relative
humidity over 100% (dew
point reached)
Water
vapor is cooled to dew point
during upward movement
Vapor
condenses into droplet on
dust particles in atmosphere