extra-tropical cyclones

extra-tropical cyclones

extra-tropical cyclones
Cyclones occurring in mid latitudes. A cyclone is a severe weather system with low central pressure. In the fully matured stage, it develops an eye at the center where there is no weather and calm prevails. The eye is surrounded by an inner circle of intense winds and a rotating cloud mass. Around the inner circle is the outer circle with less fierce weather. The diameter of a cyclone can extend up to 300 miles (500 km). See also cyclone.
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The wind climate of Europe and many parts of the world is dominated by synoptic extra-tropical cyclones and mesoscale thunderstorm outflows.
Among the topics are the energy cycle, water in the atmosphere, air masses and fronts, extra-tropical cyclones and anticlones, human influences on climate, and climate forecasting.