13 terms

Exam #2

Bergeron process
primary process for forming rain in the middle and high latitudes and the only process to form snow; needs freezing nuclei to initiate water freezing; requires supersaturated conditions (RH>100%)
Collision-Coalescence Process
primary process in tropics for randrop formation and in mid-latitudes during the summer
rain clouds
nimbostratus and cumulonimbus
hail clouds
large cumulonimbus clouds
Sub-Tropical High pressure cells
air mass
immense body of air with homogenuous physical properties
source region
area in which air masses originate
continental arctic
arctic basin and Greenland (stable) - bitterly cold/dry
Continental polar
Interior Canada and Alaska (stable) - cold/dry
Continental tropical
norther interior Mexico and SW United States (unstable) - hot/dry
maritime polar
norther pacific and atlantic (stable summer) - cool/humid
maritime tropical
Gulf of Mexico, Caribbean - warm/humid
boudary separating air masses of different densities