What is the result of collision within the collision-coalescence mechanism?

The collision-coalescence mechanism is a primary process for precipitation formation in warm clouds. During this process, small water droplets collide with each other and merge or "coalesce" to form larger droplets. This occurs because of various factors such as differences in droplet sizes and the presence of turbulence within the cloud. As smaller droplets collide with larger ones, they merge, resulting in an increased size.

Larger droplets are more likely to overcome updrafts within the cloud and fall to the ground as precipitation, whereas smaller droplets may remain suspended longer due to air resistance. Thus, the collision-coalescence process is essential for the efficient creation of rain in warm cloud environments. This mechanism highlights the importance of droplet growth in generating precipitation, making the formation of larger droplets a key outcome.