Re: Length of magic light dependant on latitude...

Dear Pete Bridgwood:

Pete Bridgwood wrote:
Hi,

Don't know if anyone can help here but here goes:

I am a photographer living in the midlands in the UK. I recently visited
Scotland (Skye) in March and was surprised at how much longer the beautiful
colours around sunset and sunrise (magic light) were visible in the sky when
in Scotland compared to further south. It seems that in Nottingham, whenever
there is a nice pink sky, it only ever lasts for maybe 10 minutes. In Skye
the sky was a wash of colour for what seemed like 30 minutes or more.

I have looked at length of sunrise - this is slightly longer in the north at
some times in the year (only by about 5 mins though).

I have checked the times of civil twilight and again cannot find an
explanation for this phenomenon.

Has anyone got an explanation that I could understand?

http://www.cso.caltech.edu/outreach/log/NIGHT_DAY/sunrise.htm
.... note that above the arctic circle in summer, the Sun never sets at
all:
http://www.cso.caltech.edu/outreach/log/NIGHT_DAY/twilight.htm

David A. Smith

.

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