Jostein, Yes, they cite Libbrecht in the article as a leading authority. I've never checked his web site. It's a hobby for him. His paying job is Chairman of the Physics department at CalTech. I've also got to look for his book, Field Guide to Snowflakes. Regards, Bob S.
On Feb 1, 2008 4:31 PM, AlunFoto <[EMAIL PROTECTED]> wrote: > Sounds like data from Kenneth Libbrecht at www.snowcrystals.com... > He's done a lot of research on the conditions that make snow crystals > take form. > > In practice, snow crystals only _persist_ long enough for photography > if the air temperature at ground levels is colder than -5° C (23 F). > Another practical constraint is that if temp. is too close to 0° C (32 > F), the snow tend to fall as big clusters of crystals or crystal > fragments; not at all photogenic. :-( > > Jostein > > 2008/2/1, Bob Sullivan <[EMAIL PROTECTED]>: > > > Article in the Chicago Tribune newspaper today with charts of > > temperatures versus type of snow crystals formed - columns, flakes, > > etc. They claimed 3-4 phases from -5 degrees F. to 32 F. I was > > surpried. > > Regards, Bob S. > > > > On Feb 1, 2008 3:17 PM, AlunFoto <[EMAIL PROTECTED]> wrote: > > > With the recent trend of dedications, this one should go to Mark Cassino. > > > :-) > > > > > > The lack of Right Temperatures for snow crystals has made me rummage > > > through the archive. Here's one thing I found: > > > > > > http://alunfoto.blogspot.com/2008/02/tarballs.html > > > > > > > > > -- > > > http://www.alunfoto.no/galleri/ > > > http://alunfoto.blogspot.com > > > > > > > > > -- > > > PDML Pentax-Discuss Mail List > > > [email protected] > > > http://pdml.net/mailman/listinfo/pdml_pdml.net > > > to UNSUBSCRIBE from the PDML, please visit the link directly above and > > > follow the directions. > > > > > > > -- > > PDML Pentax-Discuss Mail List > > [email protected] > > http://pdml.net/mailman/listinfo/pdml_pdml.net > > to UNSUBSCRIBE from the PDML, please visit the link directly above and > > follow the directions. > > > > > -- > > http://www.alunfoto.no/galleri/ > http://alunfoto.blogspot.com > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. > -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
