air masses and weather fronts
DESCRIPTION
Air Masses and Weather Fronts. http://www.inkcinct.com.au/Web/CARTOONS/2006/2006-694-Weather-front-title-fight.jpg. Air Masses. Air mass – large body of air that takes on the characteristics of the area of which it forms (source region) Over land – drier Over water – more humid - PowerPoint PPT PresentationTRANSCRIPT
Air Masses and Weather Frontshttp://www.inkcinct.com.au/Web/CARTOONS/2006/2006-694-Weather-front-title-fight.jpg
Air MassesAir mass – large body
of air that takes on the characteristics of the area of which it forms (source region)
Over land – drierOver water – more
humidAlso takes on
temperature of source region
http://blogs.redding.com/redding/smobley/archives/3-24-08-today-gfsx_500p_24h.gif
Air Masses - OriginsWhat do you think
Air Mass #1 would be like in April? Cold/Warm? Moist/Dry? Why?
What do you think Air Mass #2 would be like in April? Why?
http://www.kidsgeo.com/images/air-masses.jpg
Air Masses - OriginsMaritime tropical (mT)
warm and humidContinental tropical
(cT)warm and dry
Maritime polar (mP) cold and humid
Continental polar (cP)cold and dry
Arctic (A) even colder!
Air masses don’t just affect the US!!
http://www.geography.learnontheinternet.co.uk/images/weather/air_masses.gif
Worksheet – Transparency 18
Answer questions on the back
Weather FrontsForm where two
air masses with different characteristics collide
Four typesColdWarmOccludedStationary
http://www.bynon.cc/blog/fronts.jpg http://www.windows.ucar.edu/earth/Atmosphere/images/front_superior_epa_lg.jpg
Cold FrontCold air moves in on existing warm air (blue
triangles) Rapidly rising warm air cools, condenses
Thunderstorms common
http://www.physicalgeography.net/fundamentals/7r.html
Cold Front
http://www.windows.ucar.edu/tour/link=/earth/Atmosphere/images/cold-front_lg_gif_image.html&edu=high
Warm FrontWarm air invades area of cool air (red
circles) Warm air rises over cool air cools,
condensesRain common
http://www.physicalgeography.net/fundamentals/7r.html
Warm Front
http://www.windows.ucar.edu/earth/Atmosphere/images/warm-front_lg.gif
Cold Front vs. Warm Front
View Animation
Occluded FrontWarm air gets trapped between two cold fronts (red circles
and blue triangles/purple circles and triangles) Warm air forced up cools, condenses
Complex weather, rain/snow, thunderstorms
http://www.physicalgeography.net/fundamentals/7r.html
Occluded Front
http://www.windows.ucar.edu/tour/link=/earth/Atmosphere/images/occluded_lg_gif_image.html&edu=high
Stationary FrontNo mixing (blue
triangles and red circles)
Air masses push against each other, but neither moves
Parallel windsHard to predict
weather
http://www.windows.ucar.edu/earth/Atmosphere/images/stationary_sm.gif
Weather fronts from Monday
Worksheet – Transparency 19Fill out the questions on the back. Color the front if it helps you.