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Match each quantity with its effect on the diffusional growth rate.
List I
A. Higher supersaturation
B. Larger droplet radius
C. Latent heat release
D. Ventilation by fall motion
List II
1. reduces the effective driving gradient
2. faster growth in radius
3. enhances growth for large drops
4. slower growth in radius

  • A.A-2, B-4, C-1, D-3
  • B.A-4, B-2, C-1, D-3
  • C.A-2, B-4, C-3, D-1
  • D.A-3, B-1, C-4, D-2

Answer: A

The first two come directly from the growth equation, while the last two are corrections to it. Ventilation is negligible for cloud droplets but matters for falling raindrops considerably. Each correction applies over a different part of the size range.

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