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Atmospheric Phenomena, Sun Dogs, Solar Halos etc
djellison
post Dec 3 2007, 09:22 PM
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Thought I'd drop these into the Earth Obs section, as they're ... err... earthy smile.gif

Taken from the front of our house this Saturday - Spotted the one 'dog' - then realised it was almost a halo.

Doug
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djellison
post Dec 6 2007, 01:25 PM
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http://apod.nasa.gov/apod/ap040112.html
"A leading hypothesis holds that the hole-punch cloud is caused by falling ice-crystals. The ice-crystals could originate in a higher cloud or be facilitated by a passing airplane exhaust. If the air has just the right temperature and moisture content, the falling crystals will absorb water from the air and grow. For this to happen, the water must be so cold that all it needs is a surface to freeze on. The moisture lost from the air increases the evaporation rate from the cloud water droplets so they dissipate to form the hole. The now heavier ice crystals continue to fall and form the more tenuous wispy cloud-like virga seen inside and just below the hole. Water and ice from the virga evaporates before they reach the ground."


Doug
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Posts in this topic
- djellison   Atmospheric Phenomena   Dec 3 2007, 09:22 PM
- - rogelio   Here is a "glory" or parhelion that I sa...   Dec 3 2007, 09:33 PM
|- - climber   QUOTE (rogelio @ Dec 3 2007, 10:33 PM) He...   Dec 5 2007, 09:58 PM
- - djellison   GLORY - that reminds me.. A (dim) glory seen on a ...   Dec 3 2007, 10:41 PM
- - helvick   I have a very poor shot of a parhelia taken throug...   Dec 5 2007, 06:52 AM
- - jamescanvin   A dog nicely picked out one cloud while I was watc...   Dec 5 2007, 11:50 AM
- - helvick   I found the slightly dodgy parhelia shot taken fro...   Dec 5 2007, 03:44 PM
- - djellison   That last one is amazing - I wonder if it's th...   Dec 5 2007, 04:07 PM
|- - helvick   QUOTE (djellison @ Dec 5 2007, 04:07 PM) ...   Dec 5 2007, 04:36 PM
- - remcook   ..since we're showing off our rainbow pictures...   Dec 5 2007, 05:06 PM
|- - jamescanvin   QUOTE (remcook @ Dec 5 2007, 05:06 PM) .....   Dec 5 2007, 05:23 PM
- - nprev   ...no kidding! Wow. Saw a great cirrus rainbo...   Dec 5 2007, 05:28 PM
- - Tayfun Öner   I took this picture last year, does anybody know w...   Dec 5 2007, 05:53 PM
|- - nprev   QUOTE (Tayfun Öner @ Dec 5 2007, 09:53 AM...   Dec 6 2007, 07:48 PM
|- - climber   QUOTE (nprev @ Dec 6 2007, 08:48 PM) I re...   Dec 6 2007, 09:50 PM
|- - nprev   QUOTE (climber @ Dec 6 2007, 01:50 PM) Ba...   Dec 9 2007, 10:09 PM
- - dvandorn   Looks like a passing rocket left a hole in the clo...   Dec 5 2007, 08:49 PM
|- - dilo   Fantastic pictures, guys! I took this parelia...   Dec 5 2007, 09:03 PM
- - rogelio   Behold my glory! Here's one more shot of...   Dec 5 2007, 11:08 PM
- - djellison   http://apod.nasa.gov/apod/ap040112.html "A le...   Dec 6 2007, 01:25 PM
- - Tayfun Öner   ugordan and Doug thank you very much for the answe...   Dec 6 2007, 01:40 PM
- - djellison   Funky clouds time These were seen in November ...   Dec 6 2007, 01:56 PM
- - djellison   And fog - lots and lots of fog - over the Wye in G...   Dec 6 2007, 02:07 PM
- - climber   Found an interesting one in my old pictures : an...   Dec 6 2007, 04:33 PM
|- - AndyG   Climber, is that camera shake over a 1"-ish e...   Dec 7 2007, 09:31 AM
|- - climber   QUOTE (AndyG @ Dec 7 2007, 10:31 AM) Clim...   Dec 8 2007, 12:10 AM
- - climber   Would you think this could be a green flash (Kauai...   Dec 6 2007, 04:57 PM
- - rogelio   djellison wrote: "These were seen in November...   Dec 6 2007, 05:23 PM
- - mps   Silver clouds. Picture taken on July 2004 in Eston...   Dec 6 2007, 07:35 PM
- - djellison   Ahh - are those noticelull...err...noticeu....noci...   Dec 6 2007, 07:41 PM
- - mps   QUOTE (djellison @ Dec 6 2007, 09:41 PM) ...   Dec 7 2007, 07:39 AM
- - djellison   Nor did I - I had to google it Doug   Dec 7 2007, 08:29 AM
- - Ant103   Great photos here The foggy landscape remind me a...   Dec 9 2007, 08:46 PM
- - climber   QUOTE (Ant103 @ Dec 9 2007, 09:46 PM) And...   Dec 9 2007, 11:14 PM

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