|Winter in Sweden
Martin Grosshög pictured a diamond dust halo display in a form beloved of artists - A cross through the sun and a circle studded by mock suns.
©Martin Grosshög, shown with permission.
|A HaloSim ray tracing reproduces the display's main features.
Horizontal column crystals produced the impressive upper tangent arc. They also contributed to the upper and lower sun pillars. Internal and external reflections from their hexagonal end faces helped light the parhelic circle.
Plate crystals gave the bright 'mock suns' or sundogs. They too contributed to the pillars and parhelic circle.
Randomly oriented crystals of some form made the encircling 22 degree halo