Download group #1 - Lisle CUSD 202

GROUP #1
By: Jonny Parrillo, Conner Simpson,
and Jessica Medrala
Source
region of an
air mass
Air mass type
Arctic
Weather map
symbol
Source Region
Winter
Summer
Source
region
of anBitterair
A
Siberia, Arctic
cold, mass
dry
Cold, Dry
basin
Continental Polar cP
Interiors of
canada and
alaska
Continental
Tropical
cT
Southwest united Warm, dry
states, Mexico
Hot, dry
Maritime Polar
mP
North Pacific
North Atlantic
Mild, humid
Cold, humid
Mild, humid
Cool, humid
Gulf of Mexico,
Caribbean Sea,
Tropical and
subtropical
Atlantic Ocean
and Pacific
Ocean.
Warm, humid
Hot, humid
Maritime tropical mT
Very cold, dry
Cool, dry
Types of air masses
Tropical air masses- maritime tropical air are tropical
bodies of water. They bring hot, humid, weather to
eastern north America in the summer.
Polar air masses- These form over the cold waters of
north America and the north pacific. These affect the
West coast, bringing heavy rains in the winter. Dry, cool,
continental polar air masses bring relief from hot humid
weather.
Arctic Air masses- During the winter, the arctic regions
receive no solar radiations, continue to radiate thermal
energy, and become extremely cold and bring frigid
temperatures in the winter.
Air mass Video
• http://www.youtube.com/watch?v=kvkhBFnBTI
What is a Jet Stream?
• A jet stream is a narrow band of
fast wind. Its speed varies with
temperature and differences in air
masses.
• It can have a speed of up to 185 km/h
at altitudes of 10.7 km to 12.2 km.
What is a Front?
• A front is a narrow region between
two air masses of different densities.
• Fronts can cover thousands of
kilometers of Earths surface.
Types of Fronts
Cold Front- When cold, dense air displaces warm
air, it forces the warm air up along a steep slope.
Warm Front-advancing warm air displaces cold
air. It can cause widespread light precipitation.
Stationary Front- When two air masses meet and
neither advances. The boundary between them
stalls.
Occluded front-When a cold air mass moves so
rapidly it forces the warm air upward.
Fronts video
• http://www.phschool.com/atschool/phsciexp/
active_art/weather_fronts/
Cold front
Warm Front
Stationary Front
Occluded Front
Types of pressure systems
• Low-pressure systems- Air from the
outside of the system replaces the
rising air, the air then spirals inward
toward the center then upward. As
the air rises it cools and condenses
into clouds, making a low pressure
system associated with cloudy
weather and precipitation.
Types of Pressure systems
continued
• High-pressure systems- sinking air
moves away from the systems center
once it reaches the earths surface. The
Coriolis effect causes sinking air to
move right, making the air circulate
clockwise in the northern hemisphere
and counterclockwise in the southern.
These are usually associated with fair
weather. They dominate the earths
subtropical oceans and provide
pleasant weather.
The Arctic air masses source
region is Siberia, the Arctic
Basin.
1. True
2. False
These air masses bring hot,
humid weather to the eastern
two thirds of north America.
A. Polar Air Masses
B. Arctic Air Masses
C. Tropical Air masses
These air masses bring heavy
rains in the winter.
A. Polar Air Masses
B. Arctic Air Masses
C. Tropical Air masses
These air masses bring the most
frigid temperatures during the
winter.
A. Polar Air masses
B. Arctic Air masses
C. Tropical Air masses
This Front is when two air
masses meet and neither
advances.
•
A. Warm Front
B. Occluded front
C. Stationary Front