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| sci.geo.meteorology (Meteorology) (sci.geo.meteorology) For the discussion of meteorology and related topics. |
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#1
December 11th 03, 09:33 PM
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Is the Build-up of Charge a Physical or Chemical Process.
I've never quite understood the basics of charge production between cloud
layers and between clouds and Earth. Is charge actually produced on the surfcae of droplets when vapor condenses? Is iy caused by the physical movement of dry air across droplet surfaces? Does anyone really know? |
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#2
December 14th 03, 12:23 AM
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Is the Build-up of Charge a Physical or Chemical Process.
it's probably both
 Op Fri, 12 Dec 2003 21:26:43 +0000 (GMT) schreef Rodney Blackall : In article , Robert RB@.. wrote: I've never quite understood the basics of charge production between cloud layers and between clouds and Earth. Welcome to the crowd. Is charge actually produced on the surfcae of droplets when vapor condenses? Is iy caused by the physical movement of dry air across droplet surfaces? Breaking of hydrogen bonds is probably important as is the splitting of freezing supercooled droplets and the breaking of ice crystals. Does anyone really know? Probably not! |
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#3
December 14th 03, 08:49 AM
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Is the Build-up of Charge a Physical or Chemical Process.
On Fri, 12 Dec 2003 21:26:43 +0000 (GMT), Rodney Blackall
wrote: In article , Robert RB@.. wrote: I've never quite understood the basics of charge production between cloud layers and between clouds and Earth. Welcome to the crowd. Is charge actually produced on the surfcae of droplets when vapor condenses? Is iy caused by the physical movement of dry air across droplet surfaces? Breaking of hydrogen bonds is probably important as is the splitting of freezing supercooled droplets and the breaking of ice crystals. Does anyone really know? Probably not! I'm surprised that this still seems to be true. It is hard to see how a physical process occurring at high altitudes can result in a high potential difference been clouds and Earth. I was under the impression that raindrops falling through dry air, built up a potential, presumably positive. If droplets lose electrons, these would be transported somewhere else, probably upwards. That explains potentials between cloud layers but not between clouds an earth. Does this potential form only after charged raindrops reach the ground? Hardly. Often lightning strikes occur well before any rain falls - so that theory doesn't stand up. |
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