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Published byRussell Banks Modified over 9 years ago
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Nargis developed on APRIL 27in the central area of BAY OF BENGAL. Initially it tracked slowly north-westward and, encountering favorable conditions, it quickly strengthened. Dry air weakened the cyclone on APRIL 29, though after beginning a steady eastward motion Nargis RAPIDLY INTENSIFIED to attain peak winds of at least 165 km/h (105 mph) on MAY 2; the JOINT TYPHOON WARNING CENTRE assessed peak winds of 215 km/h (135 mph). The cyclone moved ashore in the AYEARWADY of Burma near peak intensity and, after passing near the major city of YANGON (Rangoon), the storm gradually weakened until dissipating near the border of Burma and THAILAND. Where did cyclone nargis affect?
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What are the main features of a cyclone? There are a number of structural characteristics common to all cyclones. Their center is the area of lowest atmospheric pressure, often known in mature tropical and subtropical cyclones as the eye. Near the center, the pressure gradient force (from the pressure in the center of the cyclone compared to the pressure outside the cyclone) and the complies fore must be in an approximate balance, or the cyclone would collapse on itself as a result of the difference in pressure. The wind flow around a large cyclone is counterclockwise in the northern hemisphere and clockwise in the southern hemisphere as a result of the Coriolis effect. (An anticyclone, on the other hand, rotates clockwise in the northern hemisphere, and counterclockwise in the southern hemisphere.)
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