an air mass is a volume of air defined by its
temperature and water vapor content
an extensive region of the earth's surface where large
masses of air having uniform temperature and humidity
conditions characteristic of the region originate.
Polar air mass, air mass that forms over
land or water in the higher latitudes.
Maritime tropical air masses originate over the warm waters
of the tropics and Gulf of Mexico, where heat and moisture are
transferred to the overlying air from the waters below.
Continental air mass, vast body of air that forms over
the interior of a continent, excluding mountainous areas.
Maritime air mass, vast body of air of
oceanic origin
winds
false
maritime polar
continental polar
continental polar
maritime polar
maritime tropical
continental tropical
maritime tropical
Temperature and humidity
true
polar
true
An Indian summer is typically caused by
a sharp shift in the jet stream from the
south to the north.
the boundary of an advancing mass of warm air, in particular the
leading edge of the warm sector of a low-pressure system.
A cold front is the leading edge of a cooler mass of air,
replacing at ground level a warmer mass of air, which lies
within a fairly sharp surface trough of low pressure.
boundary
true
c
b
a
d
great
true
pressure formation
cold front
warm front
a cold and warm front collide
occluded stage
False
Thunderstorms can bring heavy
rains (which can cause flash
Thunderstorms form
flooding), strong winds, hail,
when warm, moist air
lightning, and tornadoes.
rises into cold air.
Tornadoes are cause by the thunderstorms being
extremely large, unstable and with wind shear in
the lower region of the atmosphere.
Hurricanes begin when masses of warm, moist air from oceans surfaces starts to
rise quickly, and collide with masses of cooler air. The collision prompts the warm
water vapor to condense, eventually forming storm clouds and dropping back as rain.
During the condensation process, latent heat is emitted.
lightning
when a cold and warm front collide with eachother
c
a
b
spinning
false
Because inside the tornado is lower pressure
warning
storm
true
Because the Earth is getting warmer
ocean
false
eye wall
When it goes over land and when it gets into cooler
temperatures