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Which additional effect does the slice method include?

  • A.Latent heat release
  • B.The weight of the condensed water carried by the parcel, which acts as an additional load opposing its rise
  • C.Compensating descent of the surrounding environment
  • D.The mixing of environmental air into the parcel, which dilutes its buoyancy as it ascends through the layer

Answer: C

The slice method requires the ascending and descending areas to balance, so the environment warms adiabatically as it sinks and the parcel finds itself in a warmer environment than the parcel method assumed. This makes the atmosphere more stable than the parcel criterion suggests when the ascending area is large. Entrainment and water loading are separate refinements addressing different assumptions. The shared properties explain why these belong to one family, and the differences explain why more than one exists.

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