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A sea of clouds is an overcast layer of stratocumulus clouds, as viewed from above, with a relatively uniform top which shows undulations of very different lengths resembling waves on the sea.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> A sea of fog is formed from stratus clouds or fog and does not show undulations.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
In both cases, the phenomenon looks very similar to the open ocean. The comparison is even more complete if some mountain peaks rise above the clouds, thus resembling islands.
FormationEdit
A sea of clouds forms generally in valleys or over seas in very stable air mass conditions such as in a temperature inversion. Humidity can then reach saturation and condensation leads to a very uniform stratocumulus cloud, stratus cloud or fog. Above this layer, the air must be dry. This is a common situation in a high-pressure area with cooling at the surface by radiative cooling at night in summer, or advection of cold air in winter or in a marine layer.
Artistic usesEdit
- The term Sea of Clouds (雲海) is a Chinese poetic term for the surroundings of a mountain's summit, such as the one at Huangshan.<ref>Template:Cite book</ref>
- Wanderer above the Sea of Fog is an oil painting composed in 1818 by the German Romantic artist Caspar David Friedrich depicting this phenomenon.