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Optical Effects
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Fluctus (Kelvin-Helmholtz) over Erm, Netherlands
Fluctus (Kelvin-Helmholtz) shortly after sunrise over Erm, Netherlands
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Cumulus congestus that brought heavy showers near Erm, Netherlands
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Iridescence, caused by the light being diffracted as it passes through the cloud, as in this example on thin layers of altocumulus lenticularis clouds over Erm, Netherlands
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Altocumulus lenticularis and Fluctus (Kelvin-Helmholtz), along with a potentially very low sun dog at sunset, near Erm, Netherlands
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A cloud "spout" over Erm, Netherlands
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A developing Cumulus congestus with pileus, over Erm, Netherlands
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The number three outlined within the Cirrus clouds over Erm, Netherlands
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A "dog" admiring the other clouds in the sky over Erm, Netherlands
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Cumulus congestus formation that looks like a sheep's head according to Nienke, hanging out over Erm, Netherlands.
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A sunrise over Erm, Netherlands.
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A Doodle dog over Erm, Netherlands.
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A dog barking at the sun over Erm, Netherlands.
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A very surprised cloud over Erm, Netherlands.
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A fallstreak hole over Erm, Netherlands.
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A section of halo, parhelic circle and a sundog over Erm, Netherlands.
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