|
meteoptic-l [ät] ursa.fi
message archive
This is meteoptic-l [ät] ursa.fi message archive.
Note, your can reply the messages on this page only if your
are already subscribed the list.
» To the end of the list/message
| I am just thinking that the ice cover on the lake is maybe not so
| good reflector as a water surface. There are almost always some
| impurities in the ice, maybe some air bubles in it orsome snow on it
| and the ice surface is not so even as a calm water surface. The
| light will diffract too much.
Yes, you are maybe right. Water surface should work better.
| In case of winter and diamond dust in the air may be so close enough
| the reflecting surface the reflected halo effect is possible. You
| know in case of rainbows the water droplets are, I think, quite near
| the water surface. In summer conditions I don't think, the reflected
| halos are possible, because the ice crystals are in so far away from
| the reflecting surface.
It is possible to see reflected halos also in summer. There was this one
sun
pillar display in Oulu region over a year ago. A long, very bright and
sharp
sun pillar was in front of (or should I say below) uniform cloud (As?).
All the
time this sun pillar was visible sun itself was behind that cloud and only
explanation is that the sun pillar got its light from suns reflection on
sea
surface (clear sky was visible only near horizon below sun). Later that
cloud-layer rised higher so that the sun finaly came out behind cloud. A
little
bit later I was driving towards town and I saw that there was very sharp
and
nice glitter path over a sea bay which maybe produced sun pillar I saw
earlier.
Unfortunately I didn't have my camera with me but I think that Jarkko
Korhonen
saw and photographed this same case not far from my place.
| -VeikkoM-
Regards,
Jarmo
|