Clouds Flashcards
Adiabatic cooling
Cooling due to rising air, which has less pressure as it climbes and expands
Clouds prefexises
Cirru - high level, from 16kft
Alto - mid level, 6500-23000
Cumulus
Heaped
Stratus
Layered
Cirrus
Curl of hair
Nimbus
rain bearing
Cloud covere in oktas
1-2 few
3-4 scattered
5-7 broken
8 overcast
Orographic clouds
Clouds that are formed due to the enforced lifting of air by the earth topography, cooling adiabatically.
Cap cloud
Orographic cloud that touches the top of the mountain. if not, its lenticularis
Cumulus types
humilis, mediocris, congestus, and cumulinmbus capillatus
Fog visibility
<1000m
Radiation fog
At night and early hours of morning, formed when lower layers cool rapidly. (more likely with clear skies). formed over land only. Requires mixing of light wind <5kt. Higher wind will make it form stratus, until +15kts which will clear it. If no wind, dew will form
Advection fog
Formed by advection of warm and moist air over underlying cool surface. Withstands greater winds.
Frontal fog
Occurs in advance of a warm front, when air becoems saturated by rainfall