Tinted Clouds Over Saint Veran, France

November 07, 2005

Colored-clouds2

Referred by: Hubert Querlioz, Passion dans l'azur
Summary authors & editors: Jim Foster; J-M Becker

These color tinged clouds appear at first glance to be a result of iridescence. However, with iridescence or irisation, pastel colors are seen in the vicinity of the Sun. On this photo, taken on August 29, 2005 over Saint Veran, France, the Sun is actually behind the observer, which means it's linked to the glory and Brocken Spectre phenomenon. Like iridescence, the Brocken Spectre is caused by diffraction of light about tiny water droplets, however the glory and Brocken Spectre are observed in the direction of the antisolar point. In this case, the Brocken Spectre cannot be observed since it's below the photographer's horizon. See also the Earth Science Picture of the Day for August 9, 2004.

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