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单词 Shelf cloud
释义

Shelf cloud

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弧状云 Arcus cloud

出现在荷兰的滩云
出现在乌拉圭的卷轴云

弧状云(arcus cloud),是一种罕见的云层。通常会形成于冷锋之前缘,一旦寒冷的气流扩展开来,会推升前方的暖空气,气流有时会沿着水平轴方向流动。弧状云又可分为卷轴云(Roll clouds)和滩云(Shelf clouds)。滩云有时会造成龙卷风。

英语百科

Arcus cloud 弧状云

(重定向自Shelf cloud)
A time-lapse photography of shelf cloud just before a thunderstorm at Pondicherry
A shelf cloud over Enschede, Netherlands
A roll cloud associated with a severe thunderstorm over Racine, Wisconsin, United StatesCoastal roll cloud in Uruguay

An arcus cloud is a low, horizontal cloud formation. Roll clouds and shelf clouds are the two types of arcus clouds. A shelf cloud is usually associated with the leading edge of thunderstorm outflow; roll clouds are usually formed by outflows of cold air from sea breezes or cold fronts in the absence of thunderstorms.

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更新时间:2025/6/20 0:15:09