C_H = 9

(a) TECHNICAL SPECIFICATION

Cirrocumulus alone, or Cirrocumulus predominant among the C_H clouds.

(b) EXPLANATION

(i) The code figure C_H = 9 may be used only if Cirrocumulus is either the only C_H cloud present, or if its amount is greater than the combined sky cover of any coexisting Cirrus and Cirrostratus.

(ii) When Cirrocumulus is the only C_H cloud in the sky, its elements are frequently grouped into more or less extensive patches with very characteristic small wavelets.

(iii) When Cirrocumulus occurs together with Cirrus or Cirrostratus, these clouds are often associated in composite patches, usually in a process of continual internal transformation.