V2EX altocumulus

Altocumulus

定义 Definition

altocumulus(高积云):一种位于中层(通常约27公里高度)的云,常呈白色或灰白色的片状、团状或波纹状云块,常成群排列;有时预示天气将有变化(如锋面接近或不稳定增强)。

发音 Pronunciation

/ltokjumjls/

例句 Examples

We saw altocumulus clouds rippling across the afternoon sky.
我们看到高积云在午后的天空中呈波纹状铺展开来。

Altocumulus often forms in bands, and its increasing coverage can hint at an approaching weather system.
高积云常呈带状形成,而其覆盖范围增大可能暗示天气系统正在逼近。

词源 Etymology

来自拉丁语构词:alto-(意为“高的、较高层的”)+ cumulus(意为“堆积、云团”)。合起来表示“位于较高层的积状云”。(注:云类中的“alto-”通常指中层云,并非最高层。)

相关词 Related Words

文学与作品 Literary Works

  • Gavin Pretor-Pinney, The Cloudspotter’s Guide(《观云指南》):书中使用并解释了 altocumulus 等云属名称。
  • Richard Hamblyn, The Invention of Clouds(《云的发明》):在讨论云分类体系与观测记录时提及 altocumulus
  • World Meteorological Organization, International Cloud Atlas(《国际云图》):权威云类图谱中系统收录 altocumulus 的定义与类型。
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