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Which stability effect complicates coastal dispersion?

  • A.The internal boundary layer forming as air crosses the shoreline
  • B.The uniform stability of the marine air, which continues unchanged for many tens of kilometres inland from the coast
  • C.The absence of any wind
  • D.The greater roughness of the sea surface, which generates more turbulence than the smoother land does inland

Answer: A

Stable marine air crossing a heated land surface develops a growing unstable internal boundary layer, and a plume released above it fans until the layer grows to intercept it and then fumigates suddenly. Coastal fumigation is a recognised hazard for shoreline industrial sites. The marine air is modified rapidly rather than continuing unchanged.

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