Download AIR MASSES

http://www.marcsobservatory.com/mo_whatsit_hemispheres.html
AIR MASSES
&
FRONTS
http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?fronts_ir+/48h/
air mass- large bodies of air covering land
and ocean areas
1. Continental -air mass that forms over land
2. Maritime- air mass that forms over water
http://www.youtube.com/watch?v=Kmhizd4De2E
http://www.youtube.com/watch?v=kzNR_tjKExU&feature=related
CHARACTERISTICS OF AIR MASSES
Antarctic- cold mass -forms over the Antarctic
Arctic- cold mass –forms over the Arctic
Polar- cold mass – forms in polar regions
Tropical- warm air mass –form in the Tropics
Equatorial- warm air mass –forms at the
Equator
http://www.youtube.com/watch?v=rQbqujJGJRg
http://www.videopediaworld.com/video/32291/Weather-Types-Of-Air-Masses
AIR MASSES
Read/Complete “Changes in
Weather: Air Masses”, pp. 45-46
FRONTS stationary and occluded
Front – the area where two different air
masses meet/They move but do not mix!
Blue lines are cold fronts and
red lines are warm fronts
http://www.youtube.com/watch?v=vPC5i6w3yDI&feature=related
COLD FRONT
Cold Front- when a cold air mass meets up with
a warm mass or air a cold front forms---brings precipitation-afterwards, temp drop,
winds change and barometer rises
WARM FRONT
Warm Front – When a warm air mass meets
up with a cold air mass – extended periods of
precipitation –afterwards temps usually rise
OCCLUDED FRONT
a composite front when colder air surrounds
a mass of warm air and forces it aloft.
http://www.youtube.com/watch?v=LTA2pNiKDXI
FRONTS
Read/Complete
“Changes in Weather: Fronts”, pp. 47-48