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，瑞典斯德哥尔摩梅拉伦湖上空出现带有光圈的幻日现象。据了解，幻日现象乃大气层中的冰晶在寒冷天气中(反射、折射以及衍射光线)而成。