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The temperature inversion is

  • A.Whenever atmospheric moisture increases steadily with height
  • B.When the decrease in temperature or moisture or both takes place with distance from the sea
  • C.Whenever the normal decrease of atmospheric temperature or moisture, or both, with height is reversed over a short vertical interval
  • D.All of the above

Answer: C

Temperature inversion occurs whenever the normal decrease of temperature or moisture, or both, with height is reversed over a layer, so that the air above is warmer than the air below.

Because warm air then lies over cold, the layer is very stable and vertical mixing stops - which is why fog and pollution accumulate beneath an inversion.

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