On January 11, 2010, a beautiful group of nacreous clouds appeared over Kiruna, Sweden. Also known as mother-of-pearl clouds, nacreous clouds sometimes form in the polar stratosphere in wintertime and glow with a silky iridescence as they undulate across the sky.

I created this time lapse using images shot at 10 second intervals over the course of about 2 hours, from 10:25 a.m. until 12:14 p.m.. The images have not been manipulated in any way to enhance color, exposure, etc.

This piece is a part of the year-long project I pursued focusing on clouds around the world, made possible by a Thomas J. Watson Fellowship. During the 6 weeks I spent in Kiruna, I was hosted by Institutet för rymdfysik (the Swedish Institute of Space Physics).

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