Humidity, Air Pressure, and Wind Flashcards
barometer
atmospheric pressure
thermometer
atmospheric temperature
hydrometer
atmospheric moisture
Anemometer
wind speed and direction
Precipitation gauge
precipitation
weather balloon
upper atmospheric conditions
water in the atmosphere occurs in 3 forms
water vapor
water
ice
humidity
water vapor in the air
absolute humidity
the total mass of water vapor in a given amount of air
Relative humidity
-a comparison of the percent of water vapor in the air relative to the amount of water vapor that the air can potentially hold at a given air temperature.
-Best used as a measure of how close the air is to saturation
WVC / WVS x 100
saturation
When the actual amount of water vapor present in the air is equal to
the amount the air can potentially hold at a current air temperature
what temperatures hold more
water vapor
warm
Dew point
The temperture the air must
cool to, without changing the air
pressure, so that the air will be
saturated with water vapor
most accurate way to meausre water vapor iin the air
adiabatic temperature change
warm air parcel expands and cools wile floating up. cold air parcel warms and compresses as it decends.
Pressure Gradient Force (PGF)
for air to flow, there must be a
change in air pressure between
two locations. higher to lower pressure
