Jane Corey (Cloud Appreciation Society Member 23,721) watched a flying carpet of Cirrocumulus undulatus pass over Cwm, Ebbw Vale, Wales. The tiny grains of cloud distinguish it as the high-level clumpy formation Cirrocumulus, while its patterns of parallel ridges identifies it as undulatus. Running perpendicular to these ridges is a line that looks as though it has been cut through the cloud. This is a dissipation trail, or distrail, formed when an aircraft passed through the layer, causing supercooled droplets along its path to freeze into ice crystals, which grew and fell below, leaving a gap as though the cloud had been torn. No sooner do you find a perfect rippling flying carpet than someone comes along and tears it.
In Album: Roger's Timeline Photos
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750 x 764
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48.6 Kb
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