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Match each ice particle type with how it forms.
List I
A. Pristine crystal
B. Rimed crystal
C. Graupel
D. Aggregate
List II
1. heavy riming obscuring the original crystal
2. growth by vapour deposition alone
3. several crystals collided and adhered
4. accretion of supercooled droplets

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

Answer: D

The sequence corresponds broadly to increasing residence time in a mixed phase cloud. Which type reaches the ground depends on the profile of temperature and liquid water it fell through. The particle records the profile it descended through.

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