Cloud Seeding - Addition of Ice Nuclei to a Cold Cloud
QUESTION FOR THOUGHT:
1. Suppose that a thick nimbostratus cloud contains ice crystals and cloud droplets all about the same size. Which precipitation process will be most important in producing rain from this cloud? Why?
2. When cirrus clouds are above a deck of altocumulus clouds, occasionally a clear area, or "hole," will appear in the altocumulus cloud layer. What do you suppose could cause this to happen?
3. During a recent snowstorm, Denver, CO received 7 cm of snow. 60 km east of Denver, a city received no measurable snowfall, while 150 km east of Denver another city received 10 cm of snow. Since Denver is located to the east of the Rockies, and the upper-level winds were westerly during the snowstorm, give an explanation as to what could account for this snowfall pattern.