Transcript warm air masses

Meteorology
 the
atmospheric conditions and weather of
an area.
Learning Goal
To
understand the processes
acting on the Earth and their
interaction with the Earth
systems
Earth has three major climate zones. These zones are
determined by latitude, or their position on Earth in relation to
the equator
Bodies of Water
 Lakes
help moderate the temperatures on
the land

The nearby water causes an increase in
moisture in the air, so in the winter these
areas experience heavy snowfall.
Lake Effect
Snow
Air Mass
A large body of air that has the same
temperature and level of humidity
throughout.
cool air masses: where the land temperature is cool
warm air masses: form over the land that is warm.
dry air masses: form over dry areas
wet air masses: form over wet areas like oceans.
Fronts
When air masses meet, a boundary called a
front is formed, preventing the masses
from mixing.
 Two different types of air masses do not
mix, because of the different densities
 Warm is less dense than cold air.
 When warm air and cold air meet, warm
air will rise above cold air.
Cold Front

Cold Front: What is it? At the cold front, the cold air
cuts underneath the warm air and forces the warm air up
a much steeper angle. At cold fonts the air is cooled
quickly and forms a narrow band of thick cumulonimbus
clouds. These produce heavy rain, snow or precipitation.
Cold Fronts bring:
 Heavy
rains
 Thunderstorms
 Sometimes snow
Warm Front
A
warm air mass moves up and over a
cold air mass. Rainy, drizzly weather.
Often followed by clear, warm weather
Occluded Front

Two cold air masses move toward each other,
warmer air between is pushed up and brings
cool temperatures, plenty of rain and snow.
Stationary Front

When a warm and cold air mass meets, but
neither has enough energy to push against each
other. Many days of overcast, rainy weather
Cold Front: A cold air mass
moves under a warm air mass &
pushes the warm air upward. .Cold
fronts bring heavy rain and
thunderstorms and cold weather.
Warm front: forms when warm air
bumps with colder air. This front
brings rainy, drizzly weather, often
followed by warm, clear weather
.
Occluded front: forms when a warm
air mass is caught between two cold air
masses. This brings cool temperatures
and lots of rain and snow.
Stationary front: occurs when a
warm air mass and a cold air mass
meet.. This brings many days of
overcast and rainy weather.
Fronts and their symbols
Pressure and Air Movement
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