科学素养与生活应用·英语30篇（5）

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透镜状云如何在山脊上方气流中形成

Lenticular clouds form when stable, moist air flows over mountains and creates standing waves.
At the wave crest, air cools and condenses into smooth, lens-shaped cloud layers.
These clouds appear stationary despite strong winds because new moisture constantly replaces evaporated droplets.
They often stack vertically like pancakes when multiple wave levels exist in the atmosphere.
Photographers love them for their surreal, UFO-like appearance against clear skies.
Meteorologists use lenticular clouds as visual indicators of strong upper-level winds.
Unlike storm clouds, they contain little vertical motion and rarely produce precipitation.
Their formation requires precise wind speed, humidity, and atmospheric stability conditions.
Pilots treat them as warning signs of severe turbulence in the lee of mountains.
Studying them helps refine mountain-wave forecasting models used in aviation safety.