Discussion
Which processes make real updraughts weaker than that estimate?
Answer: A
Mixing with cooler drier environmental air dilutes the buoyancy, and the weight of suspended condensate acts as an additional load, so realised updraughts typically reach half the parcel value. Both effects are represented explicitly in convective parameterisation schemes. Radiation and Coriolis effects are negligible over the few minutes an updraught takes to ascend. Reading the definition literally, rather than recalling a formula, is the reliable route through questions of this shape.
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