Air masses weather patterns
Download
1 / 18

Air Masses & Weather Patterns - PowerPoint PPT Presentation


  • 122 Views
  • Uploaded on

Air Masses & Weather Patterns. Question of the Day. What is an Air Mass?. Air Masses. Movements of large bodies of air that originate at a source region Characterized by temperature and moisture content Important because they cause atmospheric disturbances. Classifying Air Masses.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Air Masses & Weather Patterns' - channer


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Question of the day
Question of the Day

What is an Air Mass?


Air masses
Air Masses

  • Movements of large bodies of air that originate at a source region

  • Characterized by temperature and moisture content

  • Important because they cause atmospheric disturbances


Classifying air masses
Classifying Air Masses

  • Depends on latitude and nature of surface of source area

    • -Latitude P(polar), A(arctic), T (tropical)

    • -Nature of Surface m(maritime), c(continental)


Midlatitudes
Midlatitudes

Regions between southern Florida and Alaska.

Primary weather producer is middle-latitude cyclone (low pressure system by meteorologists)


Fronts
Fronts

  • Boundary surfaces that separate air masses from different densities.

    • One is usually warm and has more moisture than the other

    • Overrunning is when warmer, less dense air is forced up along the colder, more dense air

    • 5 different types of fronts

      • Warm

      • Cold

      • Stationary

      • Occluded

      • Drylines


Warm fronts
Warm Fronts

Warm surface air replaces area where cooler air was

Red line with semicircles on a weather map

Change in types of clouds as front approaches

Light to moderate precipitation over a large area and for an extended period of time


Cold front
Cold Front

Cold air moves into region where warmer air is

Blue line with triangles on a map

Heavy Precipitation over a shorter duration and gusts of wind

Cooler temperatures after storm clears


Stationary front
Stationary Front

Cold Mass and Warm Mass air meet

Line with blue triangles and red semicircles on map

No movement or slow movement of air masses so gentle/moderate precipitation for days


Occluded fronts
Occluded Fronts

Fast moving cold front over takes a warm front

Heavy rain at first then light rain as it dissipates.

Can have cold-type and warm-type occluded fronts


Drylines
Drylines

Based upon humidity

Generate severe thunderstorms from Texas to Nebraska along Great Plains