1 iy fae CO AMAR: (Contizmed) of feet in the ordinary weather situations. For example, air that might be at the stratosphere today, might be down 70 to 15,000 feet in say 2 hours. Would this ce a reasonable thing, Harry? WEXLER: Sure, I'd even go further and say it would be down to the ground wider certain conditions. LIBSYs Then you would say that the mean life of stratospheric air is two days or of that erder? WEXLER: Ho, this is only under rather exceptionally favorable conditions. Lisars Well, if you take an average what would be the length of tine , nefore it came down tc sea level? WEXLER: Well, you take an average between two days and six months, maybe, or a year. LIBSYs fut it weuld be in the order of weeks or sonths? VOICE: The exceptional ease would be high thunderstoras? ROLZMA‘s No, I am thinking really of isenthropic flew dem slope. You see air dcesn't flow horisontally, it flows down, and if you have an unusual weather situation with high pressure, low pressure and so forth depending upon the complexity of the weather, air can come dow from stratospheric levels as Harry said, even down to the cround, and this is available for precipitation maybe the following or the subsequent days. ‘So the atmoscvhere is constantly DOE ARCHIVES