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Optical Effects
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Sun Dog (Parhelion) intersecting with a contrail, spotted from the campus of ArtCenter College of Design, in Pasadena, California, US
Sun Dog (Parhelion) over Carmel, Indiana, US
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Contrails on display near the Estrella Foothills, Arizona, US
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Remnants of a contrail spotted by Andrea's daughter, Ellen Hatley, at sunset over Barcelona, Spain
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A plethora of contrails spotted near Pittsboro, North Carolina, US
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Altocumulus lenticularis duplicatus captured via a photograph taken through a car windshield by Rhonda Spidell-Whitley, near Flagstaff, Arizona, US
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Iridescence over Northern California, US
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A combination of a sun dog with a parhelic circle, spotted over Lakewood Ranch, Florida, US
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Cirrus spissatus spotted during the early morning hours over Marina Town, Fukuoka City, Japan
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A contrail from what was potentially a rocket launch approximately 300 miles south of Oakland, California, US
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Similar to other clouds, contrails can cast shadows, in that an aircraft and its contrail are actually high up in the sky, while the shadow is cast downwards onto the cirrus haze layer by the sun or the moon. The thin layer acts as a canvas upon which the shadow is projected. In the end, contrail shadows are a captivating atmospheric optical phenomena that sometimes appears counter-intuitive. This example of such a contrail and its shadow was spotted over Columbus, Ohio, US.
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Cumulus homogenitus, which is cloud development as a result of human activity, such as the steam rising from the boiler roof stacks on top of buildings on the Upper West Side, Manhattan, New York, US.
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A sunset filled with altocumulus lenticularis and contrails, spotted over Sumirago, Varese, Italy
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Cirrus homogenitus as a result of aircraft condensation trails, also known as contrails, in the upper atmosphere. When these types of clouds persist and evolve towards a more natural appearance, its cloud classification changes from homogenitus to homomutatus. This example was spotted over Abergavenny, Wales.
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Full moon beyond the cirrus clouds, spotted over Arnhem, Netherlands
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Altocumulus undulatus over Crank, Merseyside, England
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