Table 1 Threshold values of lightning rate and ice fraction for the three selected groups.

From: Cloud ice fraction governs lightning rate at a global scale

 

Group-1

Group-2

Group-3

Lightning rate (fl km−2 d−1)

0.01–0.02

>0.04

0.01–0.02

Ice fraction

<0.15

0.15–0.35

>0.35