Diamond dust halos in Jena, Germany

On January 22nd 2017 I had the opportunity to witness a halo phenomenon in my home town for the first time.

The observation took place in Jena-Maua Germany (50°51’59.4″N 11°36’02.0″E) from 8:45-10:45 CET within about one kilometer. The maximum activity was observed between 10:15 and 10:45 CET.

We had a high-pressure weather situation with more and more lifting and dispelling fog (starting with 50m AGL) in the ‘Saale’-valley. Measured temperatures were about -10 to -6 degrees.

After recognizing the lower sun pillar besides the left Subparhelia in front of the fog boundary (seen from 300m height) I drove closer to the fog and found myself standing inside diamond dust (height 150m).

Between 9:45 and 10:45 the following types of halos have been witnessed: 22° halo, left and right parhelia, upper and lower tangent arcs, upper and lower sun pillar, Circumzenithal Arc, parhelic circle, Anthelion, left and right 120° parhelia, Supralateral arc, Parry arc, Subsun, left and right subparhelia, Tricker’s anthelic arc, Tapes arcs, Heliac arc and subhelic arc.

Uncertainties exist concerning the following observations: Lowitz arcs and Moilanen arc.

To sum up the best possibility of seeing this phenomenon was inside or near Jena-Maua – a small district of the city Jena which has some industry chimneys (compare the last photographs with the smoke trail). It seems legit to suppose that industrial fine particules conduced sublimation/condensation nucleus for the diamond dust development.

Author: Marco Rank, Jena, Thuringia, Germany

January 30, 2014 – Diamond dust phenomen in the Ski area Neklid

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On January 30, 2014 observed my husband Wolfgang and I on the ridge of Ore Mountains between the mountains Fichtelberg (Germany, 1214m) and Klínovec (Czech, 1244m) an incredible Halo phenomenon in top of cold Bohemian fog. This forms very often when atmospheric inversion in the valley of river Eger/ Ohře.

Weather situation: It blew a moderate east wind and drifted the whisp of fog from the valley which were divided into ice crystals on the saddle. Each wispy cloud got other halos. Temperature: -8°C.

We counted 24 different halo types, including Lowitz arcs, 120° parhelia (with blue spot), Supra- and Infralateral arcs, Parry arc, subsun (in front of snow blanket), Wegeners, Trickers, Hastings and diffuse anthelic arcs, upper and lower Tapes arcs (or 46° Parry arcs), heliac arc, subhelic arc, antisolar arc and Moilanen arc. Particularly impressive was the impressive 3D effect.

Here still a video from Oliver Kaufmann

Author: Claudia and Wolfgang Hinz