h._4DGG: (continued) ever, I think there is practical justification for knowing how faut the material will diffuse in the stratosphere because if we are considering ~— a lot of the argusent yesterday morning centered around whether the material did diffuse rapidly in the atratosphere or vhether we could consider 1% as trapped there. This would be a direct measurement of whether this was true. Now for the looal fallout, I agree, we're mot sc concerned with £t because it is the lower diffusion thet we're interested in for the lecal proble. WEXLERs I haven't finished my statement yet. Well, I mean, if I were given such a problem the firat thing I'd look for, and it is an airbursat, I'd look for a rainfall map and see if there's any ecinoidence of high rainfall vith high courts, and if there were, I'd be exceedingly pussled, beceuse this is not supposed to be particulate matter brought down. And then I'd aay, well, this shows that this Lengenir collection theory does not apply to this problem. I'd ask myself "Well, viet else could bring it dow if there's a conjunction betvem high counts and high rainfall?" dnd then I would lock inte thie air entraiment tusiness, that is, air getting entreined in the rain. I don't know of any other mechaniss that wuld do that; that is, as far as frontal precipitation is concemed. As far as convective thuaderstorn precipitation ie concerned, it might be this terrific turnover along the lines that we discussed yesterdsy. But, it apparently takes os Le > <=