Where Do Supercooled Water Droplets Exist?

Supercooled large droplets, also known as SLD, are typically found in freezing drizzle and rain where water droplets retained liquid form although water temperature is below freezing temperatures.

How can supercooled liquid water exist in clouds?

Liquid water occurs in supercooled form in both stratiform and convective clouds, because of a relative lack of ice nuclei in most environments. At temperatures at or below -39�C, liquid water will freeze spontaneously, i.e. in the absence of an ice nucleus. ... Small liquid water concentrations are the most common.

Where do water droplets crystallize?

The conversion of supercooled water droplets and/or droplets of aqueous salt solutions into ice below −30°C can occur anywhere in the atmosphere from the surface layer (resulting in ice fogs) (8) to the upper troposphere (in cirrus clouds) (4–6).