station pressure
the actual air pressure computed at the observing station
sea level pressure
the standard level of pressure 29.92 inches
ideal gas law
the relationship PV=nRT, which describes the behavior of an ideal gas
mercury barometer
consists of a glass tube open at the bottom end and partially filled with mercury
barometric pressure
the pressure due to the weight of the atmosphere; also called air pressure or atmospheric pressure
aneroid barometer
An instrument that measures changes in air pressure without using a liquid.
-Measured in millibars
barograph
An instrument that registers graphically and continuously the atmospheric pressure.
pressure gradient force
the amount of pressure change occurring over a given distance
hydrostatic equation
pressure drops more rapidly with increasing height at high latitudes and lowers the height of 500 mb
level.
Coriolis force
The apparent force, resulting from the rotation of the Earth, that deflects air or water movement.
friction
A force that opposes motion between two surfaces that are in contact
planetary boundary layer
is the lowest part of the atmosphere. Its behavior is directly influenced by its contact with a planetary
surface
geostrophic flow
A current in the atmosphere in which the Coriolis force and the pressure gradient are in balance.
, gradient flow
associated to a functional on a manifold which has a geometric interpretation, usually associated with
some extrinsic or intrinsic curvature.
anticyclone
A high-pressure center of dry air
cyclones
winds around centers of low atmospheric pressure bad storm
troughs
low points on a wave
ridges
Vertical lines running the length of the natural nail plate, usually related to normal aging.
wind vane
measures wind direction
anemometer
An instrument used to measure wind speed
aerovane
a wind instrument that indicates or records both wind speed and wind direction
evaporation
Liquid to gas
condensation
gas to liquid
saturation
A condition of the atmosphere in which the rates of evaporation and condensation are equal
sublimation
solid to gas (s)
deposition
gas to solid
humidity
the amount of water vapor in the air