Halo Phenomena

In addition to the 22° halo and the sun dogs, a wide variety of other arcs or halo phenomena occur around the sun in cold climates as a result of ice crystals in the air.

除了22°的晕和太阳犬，寒冷气候中围绕太阳还会出现多种其他弧状或晕现象，这是由于空气中存在的冰晶所致。

Photo by Clay S. Turner. Used by permission. This photo was taken just north of Atlanta in December 1986. While sundogs can often be seen in Atlanta, the other arc phonemena are very rare this far south.

这张照片由Clay S. Turner拍摄。经许可使用。这张照片是在1986年12月在亚特兰大以北拍摄的。虽然在亚特兰大常常可以看到 sundogs，但其他弧状现象在这么南的地方却非常罕见。

In the photo above are two arcs at the top of the 22° halo which are called upper tangent arcs. All of the halo phenomena shown are attributed to falling hexagonal ice crystals in the atmosphere. Greenler has done a considerable amount of modeling of the origin of the various types of halos and also discusses the modeling done by others. The upper tangent arc is attributed to thin pencil-like hexagonal ice crystals falling with their long axes horizontal. In most images I have seen, there is only one of these arcs, so it is not clear to me how the pair of arcs is formed.

图中显示的是22°晕顶部的两个弧，称为上切弧。图中展示的所有晕现象都归因于大气中下落的六边形冰晶。Greenler对各种晕现象的起源进行了大量建模，并讨论了他人所做的建模工作。上切弧归因于细长如铅笔状的六边形冰晶，其长轴水平下落。在大多数我见过的图像中，只出现一个这样的弧，因此我不清楚这两条弧是如何形成的。

The sun pillar is attributed to reflection off the sides of falling ice crystals. The flare of light around the sun is attributable to Mie scattering off particulate matter in the atmosphere.

太阳柱现象是由于冰晶在下落过程中反射光线所致。太阳周围光晕的形成是由于大气中颗粒物对光的米氏散射。