Ice Crystals

I photographed these ice crystals, on a snow-bank in the hills of Rebild, five weeks ago. In mid January we had some very cold nights, with temperatures hitting minus 15°C. The sparkles you see, coming from a field of snow, are often reflections off the facets of surface hoar crystals. Surface hoar typically forms, when a snow-bank warms up during the day and is then cooled again overnight. The night air cools the surface of the snow-bank more than the inside, so that water can evaporate from inside the snow-bank and crystallize on the surface. By morning, the snow-bank is covered with a layer of ice crystals, and they can be quite large. These usually melt again once the sun comes up, so the best time to find surface hoar is early in the morning. (Snowcrystals

COPYRIGHT © 2016 Jesper Tønning Photography

COPYRIGHT © 2016 Jesper Tønning Photography

COPYRIGHT © 2016 Jesper Tønning Photography

(Nikon D750, Nikkor PF 300/4 VR, Zeiss T* 50/2 Makro-Planar, iso 100, handheld)

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