Photo Feature: Hoar Frost, January 19, 2010

On Tuesday, January 19, 2010, the Carleton campus awoke to the scene of the entire campus painted white following a hoar frost. According to a post on, a hoar frost (also called a radiation frost or hoarfrost) "refers to the white ice crystals, loosely deposited on the ground or exposed objects, that form on cold clear nights when heat losses into the open skies cause objects to become colder than the surrounding air."

White Pines

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White Pines
The pine trees behind Gould Library and Leighton Hall are white after a hard hoar frost on January 19, 2010.


Eric Sieger


pines,, carleton college, campus scenes, winter, hoar frost
19 January 2010


Campus Life