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Fronts - PowerPoint PPT Presentation


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Fronts. In all these fronts, warm air always rises above cold air because it is less dense. Warm Front – warm air replaces cold air. Cold Front – cold air replaces warm air. Occluded Fronts – complicated two cold air masses meet, pushing warm air above them. There are also stationary fronts.

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PowerPoint Slideshow about 'Fronts' - genevieve-robert


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Presentation Transcript
slide1

Fronts

In all these fronts, warm air always rises above cold air because it is less dense.

Warm Front – warm air replaces cold air

slide3

Occluded Fronts – complicated

two cold air masses meet, pushing warm air above them.

There are also stationary fronts.

stationary front
Stationary front
  • A stationary front is a line where cold and warm air masses meet, and neither pushed the other forward – they are equally matched. Eventually one air mass pushes the other and the front changes to a cold or warm front.
  • Fronts map
slide7

From previous page – cross section along line AB

Notice that the mid latitude cyclone is made up of a cold front and a warm front joined by a low pressure center. As the low circles counterclockwise, the cold air catches up to the slower moving warm front and causes an occluded front.

midlatitude cyclones
Midlatitude Cyclones

Cyclone activity and Colorado Low graph