Extra-tropical cyclone:
- An extratropical cyclone is also called a temperate cyclone.
- It is developed in mid and high latitude beyond the tropic means between 30 to 60-degree latitude in both hemispheres.
- The main cause of the development is the formation of the front mainly occluded front.
Stage of formation of the temperate cyclone :
- Initially, the front is stationary; with no encroachment by either of cold and warm masses.
- Later, warm air start blowing from the south, and cold air blow from the north.
- In the frontal areas, pressure drops.
- Warm air moves northwards, and cold air moves southward, anticlockwise wise motion start around low-pressure areas, is called an extratropical cyclone.
- Warm air rises over cold areas, cumulonimbus clouds developed along the front.
- The cold front moves faster than the warm front and ultimately cold front overtakes the warm front and completely lifted over it and the occluded front formed and Cyclone ends.
- Temperature inversion atmospheric conditions occur with stable atmospheric conditions after extratropical cyclone ends.
Temperate cyclone distribution in the world:
- Northwestern USA,
- North Eastern USA and Canada
- Europe
- North-Western India during winter
- Southern America,
- southern Australia
For a detailed explanation, watch the below video:
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