Thanks, Stephen, but isn't it true that most CCN over the Amazon are of 
biological origin? 
To put it in very plain language, the typical assumption about where rain 
comes from is that it blows in from the ocean. I'm interested to what 
extent it is pulled in by forests. Do you think deforestation and 
degradation of vegetation on drylands create weather dead zones, by losing 
the biological capacity to transpire moisture?

Thanks to all for your input!
Brian

On Monday, June 1, 2015 at 7:53:52 AM UTC-4, Stephen Salter wrote:
>
>  Hi All
>
> Below is a map from Ben Parkes PhD thesis which tested the idea for 
> coded-modulation of the CCN concentrations in a climate model.
>
> Marine cloud brightening in a pink sea area will increase precipitation in 
> the black target area.  The blue bits will dry it.  These blue bits are in 
> reasonable agreement with the Jones Haywood Boucher paper which said bad 
> things would happen if we did MCB off Namibia.
>
> It seems that there are plenty of pink places which can rescue the Amazon 
> but not many climate modeller who are interested in replicating the Parkes 
> work.  If anyone asks I can send them maps for  the world-wide effects of 
> 89 spray regions and an explanation of the coded modulation idea.  
> Understanding why spray south of the Aleutians will help the Amazon ought 
> to be worth a prize or two.
>
>
> The next bit would be to test marine cloud brightening according to the 
> phase of el Nino and Monsoons.
>
> Stephen
>  

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