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Which layer does the strongest inversion occupy in such conditions?

  • A.The lowest few hundred metres above the surface
  • B.The whole depth of the troposphere, which becomes stably stratified from the surface to the tropopause above
  • C.The stratosphere
  • D.A layer beginning about two kilometres above the surface and extending upward to the top of the boundary layer

Answer: A

Antarctic surface inversions of twenty to thirty kelvin are commonly confined to the lowest few hundred metres, above which the profile returns to a more normal lapse rate. The intensity rather than the depth is what is remarkable. That shallow intense structure drives the katabatic winds that flow off the plateau.

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