frost flowers

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Individual ice crystals, sometimes over 200 mm in height and usually occurring in small clumps, that grow on fresh sea ice under calm conditions, when humidity above the ice is high. Frost flowers act as wicks, producing a higher concentration of dissolved ions than found in the subjacent sea-water. They appear to be a significant source of atmospheric bromine monoxide (BrO) in polar regions in spring.

Subjects: Meteorology and Climatology.

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