6. Kelvin-Helmholtz['kɛlvɪn]['helmhəults] 开尔文-亥姆霍兹浪状云
The Kelvin-Helmholtz cloud resembles a breaking ocean wave.
开尔文-亥姆霍兹浪状云就像被打碎的海浪。
When air masses at different heights move horizontally with different speeds, the situation becomes unstable. The boundary between the air masses begins to ripple, eventually forming larger waves.
当不同高度的空气团以不同速度横向移动时,情况就会变得不稳定起来。空气团的边界开始起波纹,最后形成更大波浪。
Kelvin-Helmholtz clouds are rare, because we can only see this process taking place in the atmosphere if the lower air mass contains a cloud.
开尔文-亥姆霍兹浪状云很罕见,因为这一过程只有在低处空气团中有云时才会发生。
The cloud can then trace out the breaking waves, revealing the intricacy of the otherwise invisible motions above our heads.
从这种云展现的碎浪形状可以窥见我们头顶上原本看不见的微妙变化。
【观云识天:这6种气象云帮你预知天气(组图)】相关文章:
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