i LEAs (Continued) of feet in the ordinary weather situations. For exazple,] air that might be at the stratosphere today, might be mee ee : 15,000 feet in say %) hours. Would this be a reasonable Harry? WIXLERs Sure, I'd even go further and say it would be down to thelground | under certain conditions. LIBSYs Then you would say that the mean life of stratospheric ain is two days or of that order? WeXLiRe No, this is only under rather exceptionally favorable conditions, LiIBits Well, if you take an average what would be the length of - cefore 1% caze down to sea level? WEXLER? Well, you take an average between two days and six months naybe, or 8 year. LIBSYs But it would be in the order of weeks or months? VOICEs The exceptional case would be highthunderstoras? HOLZMA8 Ro, I am thinking really of isonthropic flow dow slope. fou gee air doesn't flow horisontally, it flows down, and if have an unusual weather situation with high pressure, low bressure and so forth depending upon the complexity of the weather, air can come down from stratospheric levele as Harry said, e to the ground, and this is available for precipitation following or the subsequent days. So the atzosphere is (GB