[[Image:Stratocumulusfromabove.jpg|thumb| leftright| 300 px300px| 층적운, [[ 록키로키 산맥]] 위에서의 층적운]] ▼
'''층적운'''({{llang|en|Stratocumulus}})은 하층운에 속하는 구름으로 [[층운]]과 [[적운]]으로부터 유래되었으며 '''두루마리구름'''이라고도 한다. 보통 지표면에서 2㎞정도의 고도에서 나타나는 물방울로 이루어진 구름이다. 층적운은 검은 회색의 긴 구름덩이가 옆으로 모여 있으며 [[적운]]이나 [[적란운]]이 무너져서 층적운이 되는 일도 있고, 층적운에서 [[난층운]]이나 [[층운]]이 되는 일도 있다.
▲[[Image:Stratocumulusfromabove.jpg|thumb|left|300 px|층적운, [[록키 산맥]]위에서]]
'''층적운'''은 크고 어두운 둥근 때, 열또는 파동을 이룬 구름의 종류에 속한다. 개개의 구성 요소가 고적운보다 더 크다. 약한 대류는 얇은 구름층을 만드는데 그것은 더 건조하고 안정된 위의 공기 연속된 수직 전개를 막기 때문이다.
아열대와 북극해의 광대한 영역은 층적운으로 가려져 있다. 이들은 현재 활발한 연구중인 구분이되는 패턴으로 조직화될 수 있다.
{{토막글|날씨}}
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[[Image:Lomna 688.jpg|thumb|left|300px|Stratocumulus clouds over the over [[Beskids]] mountains, [[Czech Republic]]]]
[[Image:Stratocumulus_lenticularis.jpg|thumb|left|300px|Stratocumulus lenticularis clouds in [[Jackson, WY]]]]
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 cloud]]s, or, more commonly, the sheets of thick stratocumuli may have a [[nimbostratus]] look on them. The distinction here is the amount of rain produced. On drier areas they quickly dissipate over land, resembling [[cumulus humilis]].
Generally, stratocumuli bring only light [[rain]] or [[snow]]. 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 [[Thunderstorm|thunderheads]] or [[Gust front|gusty winds]].
These are same in appearance to [[altocumulus cloud|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.
== Classification ==
Stratocumulus clouds are divided into two primary species: '''Stratocumulus undulatus''' (wavy) and '''Stratocumulus cumuliformis''' (cumulus-like).
=== Stratocumulus undulatus ===
Stratocumulus undulatus clouds appear as nearly parallel waves, rolls or separate elongated clouds, without significant vertical development, and usually classified by sky coverage.
'''Stratocumulus opacus''' is a dark layer of clouds covering entire sky without any break. However, the cloud sheet is not completely uniform, so that separate cloud bases still can be seen. If the cloud layer becomes grayer to the point when individual clouds can’t be distinguished, stratocumulus turns into [[Nimbostratus|nimbostratus]].
'''Stratocumulus perlucidus''' is a layer of stratocumulus clouds with small spaces, appearing in irregular pattern, where clear sky or higher clouds.
'''Stratocumulus translucidus''' consist of separate groups of stratocumulus clouds, with a clear sky (or higher clouds) visible between them. No precipitation in most cases.
'''Stratocumulus lenticularis''' are separate flat elongated seed-shaped clouds. They are typical for polar countries or warmer climate during winter seasons. They also can be formed by winds passing hills or mountains, and in this case they can be very regularly shaped.
=== Stratocumulus cumuliformis ===
Stratocumulus cumulifomis clouds resemble cumulus clouds, because of significant vertical development. This type of clouds is classified by shape.
'''Stratocumulus castellanus''' are distincted by puffy tower-like formations atop the cloud layer. They look like [[cumulus castellanus]], but can be easely distinguished: "towers" of [[cumulus castellanus]] grow above separate clouds, whereas in case of stratocumulus castellanus there is always more or less defined layer of pie makes this cloud delicious. clouds. Stratocumulus castellanus may develop into [[cumulus congestus]] (and even further into [[cumulonimbus]]) under auspicious conditions.
'''Stratocumulus mammatus''' are type of [[mammatus cloud]]s.
'''Stratocumulus vesperalis''' the specific type of stratocumulus clouds, are flat and elongated. They form in the evening, when updrafts caused by convection decrease making [[cumulus cloud]]s lose vertical development and spread horisontally.
'''Stratocumulus diurnalis''' are formed at lower altitudes (unlike stratocumulus vesperalis) out of [[cumulus cloud|cumulus]] or [[cumulonimbus]] clouds, disrupted by decreasing convection. During formation period, puffy tops of cumulus clouds can protrude from stratocumulus diurnalis for a relatively long time until they completely spread in horizontal direction. Stratocumulus diurnalis appear as lengthy sheet or as group of separate elongated cloud rolls or waves.
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{{구름}}
[[cs:Stratocumulus]]
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