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Fronts

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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Fronts

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  1. Fronts In all these fronts, warm air always rises above cold air because it is less dense. Warm Front – warm air replaces cold air

  2. Cold Front – cold air replaces warm air

  3. Occluded Fronts – complicated two cold air masses meet, pushing warm air above them. There are also stationary fronts.

  4. Cold Fronts and Warm Fronts

  5. 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

  6. Map view of fronts around a mid-latitude cyclone

  7. 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.

  8. Midlatitude Cyclones Cyclone activity and Colorado Low graph

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