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Fog in central Europe

WolfeIRE · 2011-11-16 14:31:04

Wouldn't fancy driving into this without fog lights! A massive cloudbank sprawled over central Europe last week, with clouds extending from the North Sea to the foothills of the Alps. The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite acquired the above natural-color image on November 10.…

16-11-2011 2:31pm

#1

WolfeIRE

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Wouldn't fancy driving into this without fog lights!

A massive cloudbank sprawled over central Europe last week, with clouds extending from the North Sea to the foothills of the Alps.

The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite acquired the above natural-color image on November 10. Along the southern margin of the cloud bank, Alpine foothills predominate. Only the valleys hold the low-elevation clouds, or fog, and surrounding hillsides rise above it.

Fog is simply clouds formed at ground level. Like all clouds, fog forms when the local air reaches its dew point—the temperature at which water vapor condenses into tiny droplets. Sunlight typically warms the air and burns off fog, but as autumn advances and nights lengthen, valley fog becomes more common. If unperturbed by winds, such fog can persist for days.

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