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Optical Effects
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Variations of what appears to be a horseshoe vortex, formed from the remnants of contrails over Cittadella, Padua, Italy
A summer sky that hosted contrails all day according to Sarah. And then one of them was transformed into a winding road of Cirrocumulus clouds as a result of the wind within the higher levels of the atmosphere, as spotted over Brentwood, Missouri, US.
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A view of what appears to be the development of Cirrus and Cirrocumulus clouds as a result of prior contrails (homogenitus). Depending on atmospheric conditions, the ice crystals absorbing water vapour from surrounding air can grow in size and spread out in the high winds. Carole's sister, Amy Moloney, spotted these formations over Eureka, California, US.
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Fluctus (Kelvin-Helmholtz) and Contrails populate the sky over Brando, Aland, Finland
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A feather in the sky over Farnham, Surrey, England
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A mixed sky with a contrail making its mark, nearly perpendicular to a host of other contrails, accompanied by altocumulus in the distance and stratus fractus in the foreground. This view was observed near Wells, Somerset, England.
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Cirrus vertebratus homogenitus forms as a result of an aircraft condensation trail (contrail). The spine of the cloud begins as a contrail and is aligned to the flow of the high winds, whose water droplets freeze into ice crystals that fall below into slower, moister airflows. This variation was spotted over Kenilworth Gardens, Melksham, England.
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A plethora of contrails over Rayleigh, Essex, England
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Cirrus uncinus over Westcliff on Sea, Essex, England
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Cirrus homogenitus (Contrail) on a clear, cold winter morning near Wye River, Victoria, Australia
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Contrails, formed when it’s cold enough and moist enough, the water vapour contained in the plane’s hot exhaust gases mixes with the very cold air to condense and form ice crystals. This plethora of contrails was spotted over St. Martin de Fenouillet, France.
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Within this cloud formation, Lisa Beth noticed a fairy on top of a magic wand, over Greenfield, California, US
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Contrails traversing the sky at dusk over Toyohama, Fukuoka City, Japan
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Cirrus, Virga, and Contrails populate the sky over the Glastonbury Festival, Somerset, England
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Cirrus over Fishtoft, Lincolnshire, England
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Cirrus vertebratus formed by what appears to have been a former contrail, over Benafim, Algarve, Portugal
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