Transient Iridescence In Clouds At Sunset
Taken by Peter Lowenstein on April 23, 2017 @ Mutare, Zimbabwe
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  Camera Used: Panasonic DMC-TZ60
Exposure Time: 10/8000
Aperture: f/5.6
ISO: 100
Date Taken: 2017:04:24 12:08:10
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Yesterday evening Mutare experienced transient pastel-colored iridescence and other reflections of setting sunlight from a variety of clouds which were precursors to approaching regional rain. These included cirrostratus and cirrocumulus clouds which exhibit striation and incipient Kelvin Helmholtz instabilities (first two pictures). Later a beautiful wispy dendritic cirrus cloud shone brightly high in the sky (third picture). The fourth picture shows so many different cloud types that it could almost be used as a guide to mid and high level horizontal (non-convective) cloud formations. These include (from bottom left to top right) stratus, stratocumulus, altostratus (including lenticular), cirrostratus, cirrocumulus (Mackerel sky) and pure cirrus cloud. The photographs were all taken using a Panasonic Lumix DMC-TZ60 compact camera in intelligent auto mode.
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