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Tropical cyclones occur on :

  • A.Meso-scale
  • B.Micro-scale
  • C.Planetary-scale
  • D.Synoptic-scale

Answer: D

Tropical cyclones occur on the synoptic scale.

Meteorology groups weather systems by horizontal size. Synoptic-scale systems span roughly 1,000 km and last days, which is the size of a tropical cyclone and of the depressions shown on a weather map. Their structure includes mesoscale features, such as the eyewall and rainbands, but the cyclone itself is a synoptic system.

Micro-scale covers eddies and turbulence of metres. Mesoscale covers thunderstorms, sea breezes and tornadoes, from a few to a few hundred kilometres. Planetary scale is reserved for long waves and the general circulation of thousands of kilometres.

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