斯德哥爾摩上空的"幻日"

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A parhelion, or sundog, combined with a halo, is seen over the Lake Malaren in central Stockholm, Sweden on November 30. These weather phenomena are created by ice crystals in the atmosphere during cold weather。

11月30日，瑞典斯德哥爾摩梅拉倫湖上空出現帶有光圈的幻日現象。據瞭解，幻日現象乃大氣層中的冰晶在寒冷天氣中(反射、折射以及衍射光線)而成。