FIG. 2. Monthly distribution of the amount (mm month21
) and frequency (days month21
) of (a),(b) total rainfall;
(c),(d) non-TC rainfall; and (e),(f) TC rainfall in Hong Kong during 1961–2012. (g),(h) The corresponding percentage
contributions of TC rainfall to total rainfall. Rainfall frequencies with daily rainfall $100 mm, 100 .
daily rainfall $ 50 mm, and 50 . daily rainfall $ 1 mm, as well as their total, are denoted by green, red, blue, and
purple lines, respectively. For (h), there was only one day in December on which over 100 mm of rainfall was
recorded, which was brought by Typhoon Irma on 2 Dec 1974.