幻日现象，加拿大

幻日现象，马尼托巴省，加拿大 

      加拿大马尼托巴省丘吉尔冻原上出现了幻日光弧这种日光现象。幻日现象经常在北极和南极出现。当太阳靠近地平线，高空中悬浮的冰晶排列起来，就像菱镜一样折射日光，这个时候便形成了幻日。

　　图片为《国家地理杂志》2005年12月号的“白色避难所：冬日里的加拿大国家公园”一文而拍摄，未刊发。

Photo by Norbert Rosing

A solar phenomenon known as a sundog arcs over the tundra in Churchill, Manitoba, Canada. Sundogs are fairly common occurrences in the Arctic and Antarctic. They form when the sun is near the horizon and ice crystals high in the sky line up in a way that bends the solar rays like a prism.

Photo shot on assignment for, but not published in "Refuge in White: Winter in a Canadian National Park" December 2005, National Geographic magazine

（翻译：tomato）