Ice halos...
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Discussion

Skaffen

Original Poster:

514 posts

232 months

Saturday 23rd January 2016
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I was giving the Mito a bit of a spruce up last Saturday and was checking I'd not left any smears when I noticed a strange rainbow effect. I quickly realised it was actually a reflection from the sky and dashed inside to grab my camera for a few photos smile.

Circumzenithal and supralateral arcs

Circumzenithal arcs are actually fairly easy to miss as they appear directly above around the zenith (hence the name) so you only see them if you're looking up into the sky. I've seen one before (lounging in a garden on a sunny day watching clouds) so recognised what it was.

This one had a second fainter arc meeting it which I'd not seen before. From a bit of searching I found it was likely a supralateral arc...
Circumzenithal and supralateral arcs

Looking at another photo I took where I tried to include the sun I also spotted an even fainter arc lower down, which is a tangent arc.
Circumzenithal, supralateral and tangent arcs.

I emailed the photos to an expert in atmospheric optical phenomena and he confirmed what those arcs were. He did a bit of analysis on the photo and also found the 22 degree halo and a very faint parry suncave arc showing too.

He said that convex dark reflective surfaces are ideal for spotting ice halos - it seems the bonnet of an Etna Black Mito was just the job smile. He's posted my photos up as Optics Picture Of the Day:

Halos & How to Spot Them - OPOD

The website's really interesting - all sorts of really weird and wonderful optical phenomena shown and explained!

I think it must have been a good day for ice halos around the UK as the BBC had a small piece on them last Monday as well.

DibblyDobbler

11,443 posts

221 months

Saturday 23rd January 2016
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Nice work clap

Skaffen

Original Poster:

514 posts

232 months

Sunday 24th January 2016
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Thanks smile

Below is the previous one I spotted and photographed - that was 5 years ago so it was great to see another!

DibblyDobbler

11,443 posts

221 months

Sunday 24th January 2016
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Very nice again Matt! Did you used to have a different ID on here?

Skaffen

Original Poster:

514 posts

232 months

Sunday 24th January 2016
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Nah - I've always been Skaffen here smile. I don't post much on PH other than occasionally photos I've taken at Sunday Services and Goodwood Breakfast Club events - not sure I went to any of either in 2015, but certainly in previous years!

DibblyDobbler

11,443 posts

221 months

Sunday 24th January 2016
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Ah - just wondered. I went to follow you on Flickr then realised I already was!

A Banks reader I presume?

Skaffen

Original Poster:

514 posts

232 months

Monday 25th January 2016
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Yes - not many people get the reference of where my ID comes from smile. I started using Skaffen for signing up on forums after the previous username I was regularly using was more often than not already taken, so as I'd recently read Use of Weapons at the time I picked a character name from there - this was many many years ago though! I ended up using FurLined on some photo sites for similar reasons.

DibblyDobbler

11,443 posts

221 months

Monday 25th January 2016
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Nice choice - one of my favorites smile