¥Lightning requires the separation of
different charges
into different regions of a cloud.
¥How does
charge separation in clouds occur?
¥ We
donÕt know for certain, but we observe this:
¥Lightning only occurs in cold clouds
with supercooled droplets
and temps below 5oF.
¥Thus, the ice crystal processes
responsible for precipitation
in cold clouds likely plays an critical
role in charge separation.