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- pvtmakel_at_MAPPI.HELSINKI.FI wrote:
> Lainaus Mats Mattsson <matmat_at_TELIA.COM>:
>
> > It looks like pine tree pollen.
> > If you compare it with this image which is
> pine tree.
> > It looks very much the same.
>
>
> Hello!
>
> Surely Harald's photos are caused by pollen,
> but I
> disagree it is caused by pine (or spruce)
> pollen.
> The corona is lacking brightenings on the top
> and
> bottow of the first order and on the side in
> the
> second order corona, which are typical for pine
> pollen coronae. The 'mickey mouse' shape of
> the
> pine pollen particles cause these features.
> Also
> the corona looks too round for pine pollen.
>
> I think Claudia's suggestion of alder or hazel-
> tree is better. The later is not, however,
> familiar
> for me. In our laitudes there just few tress
> causing
> bright pollen coronae.
>
> regards,
> -Veikko Mdkeld-
Veikko,
That pollen corona I can tell has no
enhancements whatsoever but it is quite
symmetrical. I have never seen such a symmetrical
corona except in fog, I myself have never
observed a nice pollen corona but this past
february I got to photograph my first elliptical
halo and I am sure you heard about it on the
mailing list. Harald Edens also got elliptical
halo too and his was 8 degrees high and 5 degrees
wide.
All of the best,
Michael
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