Advektionståge
Tåge over San Francisco bugten.
Advektionståge (også havtåge) skabes, når varm og kold luft mødes, og den varme luft afkøles til under dugpunkttemperaturen. Dvs. at luften bliver overmættet, da den før så varme luft nu er afkølet og har et lavere mætningspunkt. Hvis sigtbarheden kommer under 1.000 m, er det tåge. Advektionstågen dannes om foråret og tidlig sommer over havet og store søer, når varm luft fra landet blæser ud over det kolde hav. Det dannes også om efteråret og vinteren, når varm luft fra havet strømmer ind over det kolde land.[1]
Fodnoter
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San francisco in fog with rays.jpg
Forfatter/Opretter: Brocken Inaglory, Licens: CC BY-SA 3.0
Out of fog Bay Bridge and Golden Gate Bridge and San Francisco in fog and w:crepuscular rays. The image was sent to Dr. Andrew T. Young,. Here's his description: "... it's unusual to see these shadows so clearly at such an oblique geometry: usually, the crepuscular rays are best seen in forward scattering, and much less well in back-scattering.But here, you're looking almost at right angles to the illuminating rays."
Panorama stitched from images photographed at the same time, the same date and the same place (Commons:Featured_picture_candidates/File:San_francisco_in_fog_with_rays.jpg).
Forfatter/Opretter: Brocken Inaglory, Licens: CC BY-SA 3.0
Out of fog Bay Bridge and Golden Gate Bridge and San Francisco in fog and w:crepuscular rays. The image was sent to Dr. Andrew T. Young,. Here's his description: "... it's unusual to see these shadows so clearly at such an oblique geometry: usually, the crepuscular rays are best seen in forward scattering, and much less well in back-scattering.But here, you're looking almost at right angles to the illuminating rays."
Panorama stitched from images photographed at the same time, the same date and the same place (Commons:Featured_picture_candidates/File:San_francisco_in_fog_with_rays.jpg).
