Stratocumulus cloud
From Wikipedia, the free encyclopedia
 |
|
| Abbreviation | Sc |
|---|---|
| Symbol |  |
| Altitude | Below 2,400 m (Below 8,000 ft) |
| Classification | Family C (Low-level) |
| Precipitation Cloud? | Not usually |
A stratocumulus cloud belongs to a class characterized by large dark, rounded masses, usually in groups, lines, or waves, the individual elements being larger than those in altocumuli, and the whole being at a lower altitude, usually below 2,400 m (8,000 ft). Weak convective currents create shallow cloud layers because of drier, stable air above preventing continued vertical development.
Vast areas of subtropical and polar oceans are covered with massive sheets of stratocumuli. These may organize in to distinctive patterns which are currently under active study. In subtropics, they cover the edges of the horse latitude climatological highs, and reduce the amount of solar energy absorbed in the ocean. When these drift over land the summer heat or winter cold is reduced. 'Dull weather' is a common expression incorporated with overcast stratocumulus days. If the air over land is moist and hot enough they may develop to various cumulus clouds, or, more commonly, the sheets of thick stratocumuli may have a nimbostratus look on them. The distiction here is the amount of rain produced. On drier areas they quickly dissipate over land, resembling cumulus humilis.
Generally stratocumuli bring no precipitation or only drizzle / light rain or snow at best. However, these clouds are often seen at either the front or tail end of worse weather, so may indicate storms to come, in the form of thunderheads or gusty winds.
These are similar in appearance to altocumuli and are often mistaken for such. A simple test to distinguish these is to compare the size of individual masses or rolls: when pointing your hand in the direction of the cloud, if the cloud is about the size of your thumb, it is altocumulus; if it is the size of your entire hand, it is stratocumulus.
[edit] See also:
[edit] External links
- National Science Digital Library - Stratocumulus
- Muriel Martin Online - Stratocumulus Cloud
- WW2010 University of Illinois - Stratocumulus Clouds
- BBC Weather Centre - Types of Cloud - Stratocumulus and Altocumulus
|
|
|
|---|---|
| High Clouds (Family A): | Cirrus (Ci) • Cirrus uncinus • Cirrus Kelvin-Helmholtz colombia • Cirrostratus (Cs) • Cirrocumulus (Cc) • Pileus • Contrail |
| Middle Clouds (Family B): | Altostratus (As) • Altostratus undulatus • Altocumulus (Ac) • Altocumulus undulatus • Altocumulus mackerel sky • Altocumulus castellanus cloud • Altocumulus lenticularis |
| Low Clouds (Family C): | Stratus (St) • Nimbostratus (Ns) • Cumulus humilis (Cu) • Cumulus mediocris (Cu) • Stratocumulus (Sc) |
| Vertical Clouds (Family D): | Cumulonimbus (Cb) • Cumulonimbus incus • Cumulonimbus calvus • Cumulonimbus with mammatus • Cumulus congestus • Pyrocumulus • Pyrocumulonimbus |
