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Originally posted by Droogie
According to forgetomori, it is likely the phenomenon we're looking at is something called a "Crown flash". This is based on a reference to a 1971 letter sent to Nature by Gall and Graves from the Univeristy of Michigan, which forgetomori says describe exactly what the youtube videos record.
For those of you that won't bother to open the link, here's what it says:
July 2, 1970, Ann Arbor, Michigan. While observing a thundercloud. "At and just above the peak of the storm cell the cloud mass seemed to be undergoing sudden changes in brightness lasting for several seconds at a time....
The phenomenon continued to occur repeatedly at intervals of 30-60 s during the next 15 or 20 min, providing the basis for the following description. The sudden brightening effect began concurrently with lightning strokes in the main cloud mass, but continued after the lightning flash was over. It had the appearance of a ripple-like upward and outward spread of radiance from the region just west of the peak of the cumulus cloud, resembling somewhat a fan-like display of aurora borealis. It lasted a substantial fraction of a second with each lightning stroke.
On one or two occasions it had the appearance of a bright ring moving rapidly outward and upward above the cumulus peak. On these occasions it was clearly observed to extend beyond the cloud and into the blue sky. A linear shadow, apparently cast by one of the cumulus masses, appared to shift its position suddenly up or down with each occurence of the event."
Here's a link to the letter at Nature, it's not that easy to understand for those unfamiliar with the lingo.
Possible Newly Recognized Meteorological Phenomenon called Crown Flash
Anyway, for those of you who awaited a thought out explanation can now rest easy.
post by TribeOfManyColours
What is this? 2010
Originally posted by pauljs75
Get water right at its triple point, and it doesn't take much to trigger the nucleation process. Occurs in fractions of a second. Then it would just take a bit of turbulence in the atmosphere to create a nice show. Interestingly enough, any sources of radiation might affect this too. (Look up the Wilson or cloud chamber for a man-made example of how radiation affects a substance at its triple point.) A strong enough solar flare might get enough particles through to trigger condensation trails.
I bet if you go 5 miles up or so, at times the pressure and temperature can be low enough at times to sit right at that point where water is on a razor's edge between phase changes. If it jumps back and forth between a transparent gas and ice crystals, I bet that's what it would look like. Thus somebody got lucky enough to catch some video when the conditions were just right.
If we had a meteorologist around, there might be a chance that they could confirm that water does reach its triple point in Earth's atmosphere.
Originally posted by ReluctantBlossom
If anyone is still following this, I just found an article with the answer!
blogs.discovermagazine.com...
"The answer lies in this: ice crystals, especially long needles, tend to become aligned with the ambient electric field.
So what you are seeing is sunlight reflecting off ice crystal faces that are constantly being oriented by the developing electric field just above the [cumulonimbus] top. Then there is a discharge in the cloud, and the field collapses momentarily, and the crystals begin to realign again. Then this just keeps happening over and over."
And it looks pretty cool, too!
Originally posted by pauljs75
Apparently CERN thinks this subject is worth researching. Might be worth reading this article at Nature.com.
It sounds like a conspiracy theory: 'cosmic rays' from deep space might be creating clouds in Earth's atmosphere and changing the climate. Yet an experiment at CERN, Europe's high-energy physics laboratory near Geneva, Switzerland, is finding tentative evidence for just that.
www.nature.com...
Please visit the link provided for the complete story.edit on 26-8-2011 by pauljs75 because: trying to format better
(...) lightning discharge in a thundercloud can temporarily change the electric field above the cloud where charged ice crystals were reflecting sunlight. The new electric field quickly re-orients the geometric crystals to a new orientation that reflects sunlight differently.
Originally posted by ReluctantBlossom
If anyone is still following this, I just found an article with the answer!
blogs.discovermagazine.com...
"The answer lies in this: ice crystals, especially long needles, tend to become aligned with the ambient electric field.
So what you are seeing is sunlight reflecting off ice crystal faces that are constantly being oriented by the developing electric field just above the [cumulonimbus] top. Then there is a discharge in the cloud, and the field collapses momentarily, and the crystals begin to realign again. Then this just keeps happening over and over."
And it looks pretty cool, too!
Originally posted by NoHierarchy
To my, admittedly, untrained eye, it looks to be magnetic (or electro-magnetic). Notice how in both videos the cloud warping is spotted near a dense stormcloud? The amount of electric charges excited/generated by a stormcloud is great (we need only look at lightning for an example). Perhaps particles (whether organic, synthetic, ice, etc.) high up in the storm cloud are being magnetically charged and pulled around by erratic electromagnetic changes within the storm cloud? We cannot rule such a phenomenon out, especially considering the massive electrical charges/releases induced by storm clouds.
Other than that, the only explanation that seems plausible is some sort of camera lens manipulation.
Originally posted by Maxmars
It's a Pileus Cloud which occurs at the very top of rising cloud formations.... As the wispy clusters of uniformly sized droplets of mist rise above the cloud, if the sun shines through it just so, it becomes something very special.... the sunlight it makes it beautiful... no?