Tropical depression cyclone is a rapidly rotating storm system characterized by a low-pressure center, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain and squalls.
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Tropical depression cyclones are very rare in the South Atlantic due to consistently strong wind shear and a weak Intertropical Convergence Zone.
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Tropical depression cyclones draw in air from a large area and concentrate the water content of that air into precipitation over a much smaller area.
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Tropical depression cyclone is the generic term for a warm-cored, non-frontal synoptic-scale low-pressure system over tropical or subtropical waters around the world.
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Tropical depression cyclones tend to develop during the summer, but have been noted in nearly every month in most tropical cyclone basins.
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Tropical depression cyclones possess winds of different speeds at different heights.
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Tropical depression cyclones are assessed by forecasters according to an array of patterns, including curved banding features, shear, central dense overcast, and eye, in order to determine the T-number and thus assess the intensity of the storm.
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Ten of these warning centres worldwide are designated as either a Regional Specialized Meteorological Centre or a Tropical depression Cyclone Warning Centre by the World Meteorological Organisation's tropical cyclone programme.
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Tropical depression cyclones destroy agriculture, kill livestock, and prevent access to marketplaces for both buyers and sellers; both of these result in financial losses.
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Tropical depression cyclones help maintain the global heat balance by moving warm, moist tropical air to the middle latitudes and polar regions, and by regulating the thermohaline circulation through upwelling.
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Tropical depression cyclones are further influenced by the Atlantic Meridional Mode, the Quasi-biennial oscillation and the Madden–Julian oscillation.
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Tropical depression cyclones are tracked by weather satellites capturing visible and infrared images from space, usually at half-hour to quarter-hour intervals.
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