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Which four reservoirs appear in the Lorenz energy cycle?

  • A.Zonal and eddy available potential and kinetic energy
  • B.Internal, potential, kinetic and latent energy considered separately for the atmosphere as a whole
  • C.Radiative, latent, sensible and kinetic energy
  • D.Available potential energy divided among the four seasons of the year at each latitude of the globe

Answer: A

The cycle divides both available potential energy and kinetic energy into zonal mean and eddy parts, giving four reservoirs connected by conversion terms. The dominant path runs from zonal available potential energy through eddy available potential energy to eddy kinetic energy and finally to zonal kinetic energy. Mapping the observed magnitudes onto that diagram summarises the general circulation compactly. Framing the question as which quantity the change acts upon makes the answer follow without calculation.

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