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Match each inversion with its mechanism.

List I

A. Radiation inversion

B. Subsidence inversion

C. Frontal inversion

List II

P. descending air warming adiabatically

Q. surface cooling on a clear calm night

R. warm air overrunning colder air at a front

Select the correct match.

  • A.A-R, B-P, C-Q
  • B.A-Q, B-R, C-P
  • C.A-Q, B-P, C-R
  • D.A-P, B-Q, C-R

Answer: C

Radiation inversions form at the surface overnight, subsidence inversions form aloft within anticyclones, and frontal inversions occur where warm air overruns cold. Each has a characteristic depth and position that allows it to be identified on a sounding, and recognising which is present tells a forecaster a great deal about the situation.

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