Saturday, 10 January 2009

Diamond dust displays in Sudelfeld Pass

The new year started with two nice diamond dust displays on 3 and 7 January. The weather situation was similar: above the Inn valley there was a low stratus layer with an upper limit of ca. 1000-1200m. The passable Sudelfeld Pass is situated in this level, where I've already seen several diamond dust haloes. In the afternoon the clouds dissipated and desintegrated into ice crystals.

On 3 January columns dominated. The 22° parhelia, the upper tangent arc with convex Parry arc and the colourful supra- and infralateral arcs appeared in –6°C ( 1 ).

The haloes on 7 January (see image above) were produced at a temperature of –8°C and consisted mainly of plates. The appearance of the phenomena changed at seconds intervals. We observed 22° halo with parhelia, upper and lower sun pillar, CZA, 46° halo, subsun, sub parhelia, parhelic circle with 120° parhelia and anthelion, heliac arc, Wegener's arc and Moilanen arc ( 2 ).

Text: Claudia Hinz
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4 comments:

  1. Elmar Schmidt11 January 2009 at 23:03

    A beautiful and rich classic display from down south. I wonder if anyone could exploit the recent perigy full moon w.r. to haloes

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  2. Elmar Schmidt11 January 2009 at 23:06

    A beautiful and rich classic display from the Alps. I wonder if anyone could exploit the recent perigy full moon w.r. to haloes

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  3. marko riikonen12 January 2009 at 00:50

    Another one of those interesting "Parry without tangent arc" -cases. And CZA is top notch.

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  4. Francesco14 January 2009 at 11:27

    Beautiful, congrats!

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