Air Masses Flashcards
What is Air mass
A huge body of air that has similar temperature, humidity, and air pressure at any given height.
Humidity level
It depends on if the air mass forms over water or land
What is temperature?
It depends on the latitude (closer to the equator is warmer and closer to the polls is colder)
How does the air mass move?
- Global wind patterns move air through the glob
- Helps make weather predictions
Jet streams
A band of high-speed winds high up in the atmosphere blowing west to east carry air masses in same direction
Prevailing westerlies
Major wind belt over the USA pushes over air masses from the west east
- m= Maritime
- c= Continental
- T= tropical
- P= polar
- A= arctic
Maritime = overwater
Continental = overland
Tropical = low latitude (hot)
Polar = medium latitude (cool/cold)
Arctic = high latitude (frigid)
Continental tropical
Ct, land by equator, dry and hot
Continental polar
cP, land mid latitude, dry and cool/cold
Continental Arctic
cA, Land Arctic area by the poles, dry and frigid
Maritime Tropical
mT, water by equator, wet, and hot
Maritime polar
mP, water, mid latitude, wet, and cool /cold
What are the characteristics associated with the continental polar air mass?
Cold and dry
What type of air mask would form over the warm water near the equator?
Mary time tropical
What three characteristics do air molecules have to have in common to be considered an air mass?
Temperature, humidity, and air pressure
Front
Boundary between two air masses
Stationary front
When an air mess hardly moves or does not move at all for an extended period of time
Local weather conditions change due to the movement of..
Air masses
An air mass that forms over northern Canada will be ___ and __.
Dry and frigid
Why does a cold front tend to push up a warm front?
Cold front move faster because colder is more dense, and there are more molecules of material wedges under warm front, causing it to lift
Meteorologist
Is a scientist who studies the weather
What do ocean currents do?
They greatly affect the temperature of air masses above the water as well as moisture content acts like a conveyor belt
We in the United States are tornadoes most likely to form? Why?
Central plains states because that is the area where cool air form Canada/jetstream (north) the warm air from the Gulf of Mexico (south)
Radar
Monitors their formation and warnings are sent out