Upper Sun Pillar
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Scan day: 07 March 2014 UTC
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Description: Contains a description and formation of sun pillars.
Plates: more or less horizontal (with tilts) Plates: Reflection at the lower basal face The picture shows a upper sun pillar after sunset. Photo: © Mirko Nitschke, Dresden Sun pillars are vertical rays of light above or below the sun. In most cases only the upper sun pillar is visible. It is of about the same diameter and colour as the sun. The upper sun pillar can be observed best short after sunset. Then it looks as if the light beam of a bright searchlight is going up vertically from the horizon. At sunset its colour is a kind of orange—white. Some minutes after sunset the pillar becomes more and more orange-red and fades at about 20 to 60 minutes after sunset. When the sun pillar is fully developed, it sometimes has a diffusely en1arged top. That is the upper tangent arc, the “arms” of which form a sharp angle at low sun elevations. In freezing fog, a sun pillar can be more than 30° long. In many cases, however, there is a pillar of only 5 to 10° visible.
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WEBSITE Info
| Page title: | Upper sun pillar |
| Keywords: | upper sun pillar, halo, halo phenomena |
| Description: | Pictures and information about upper sun pillar |
| IP-address: | 81.169.145.154 |
WHOIS Info
| NS | |
| WHOIS | Status: connect |
| Date | Changed: 2007-10-31T05:04:11+01:00 Changed: 2006-12-04T23:27:06+01:00 Changed: 2006-12-05T00:35:07+01:00 |