H2Otown_WX Posted July 9, 2012 Share Posted July 9, 2012 I don't know what it is about the Bergeron Process, but it just doesn't click with me. I know it's got to do with the fact that ice crystal have a lower SVP than liquid droplets.. Link to comment Share on other sites More sharing options...
LocoAko Posted July 9, 2012 Share Posted July 9, 2012 Perhaps you could be more specific about what it is that you're confused about? It sounds like you're on the right track. As you can see from the above graph, and as you stated, at subfreezing temperatures, the saturation vapor pressure is lower for ice crystals than it is for liquid water droplets. Therefore, at a given temperature, you may be saturated with respect to liquid but supersaturated with respect to ice, creating a strong tendency for water to undergo deposition onto the ice crystals and away from the liquid droplets and causing ice crystals to preferentially grow against their liquid counterparts. This Δes is maximized around -15°C, hence why the best snow growth (dendrites ) occurs at the level between -12°C and -18°C (assuming other conditions are met). Link to comment Share on other sites More sharing options...
WxMidwest Posted July 9, 2012 Share Posted July 9, 2012 One could easily make "John Bergeron" references during lecture. The host of Hollywood Sqaures, Dancing With The Stars, and of course American's Funniest Home Videos. Met300 was fun..... Link to comment Share on other sites More sharing options...
H2Otown_WX Posted July 16, 2012 Author Share Posted July 16, 2012 Perhaps you could be more specific about what it is that you're confused about? It sounds like you're on the right track. As you can see from the above graph, and as you stated, at subfreezing temperatures, the saturation vapor pressure is lower for ice crystals than it is for liquid water droplets. Therefore, at a given temperature, you may be saturated with respect to liquid but supersaturated with respect to ice, creating a strong tendency for water to undergo deposition onto the ice crystals and away from the liquid droplets and causing ice crystals to preferentially grow against their liquid counterparts. This Δes is maximized around -15°C, hence why the best snow growth (dendrites ) occurs at the level between -12°C and -18°C (assuming other conditions are met). Thanks Loco you always give a good explanation. Idk what it was specifically that I didn't "get"..the whole concept just seemed sort of abstract but it makes sense now. But down in the tropics, cloud growth doesn't occur this way for the most part, correct? Link to comment Share on other sites More sharing options...
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