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> Winter began with a chill in Alberta, Canada (near -30 ), but with
> some lovely observations. I was fortunate enough to be outside for
> most of the day on Saturday. For most of the day there was a light
> snow out of very thin cloud, really a settling of ice crystals.
In wintertime you can see often bright and colorful halo in
diamond dust (ice crystals on the air near the ground level).
I my mind those more beautiful than ordinary halos in high
level clouds. I have seen many photostaken in Alaska by
Walt Tape and my Finnish friends who visited there in the
last January.
Those diamond dust halos are privileges of northern (or
very southern) latitudes. Just a month ago three Finnish
observer, Marko Riikonen, Jukka Ruoskanen and Jarmo Moilanen,
left to Oymyakon in Eastern Siberia for several months to
study halos in extreme cold temperatures. It would very
interesting to see, which kind of results they will get.
-VeikkoM-
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