ho atthe ne LAS3 (contdimmed ) | place from the fact that temperatures at the ground drop dow wall below the levels they're supposed to drop down if the air stays the same and if the air was ccoled by evaporation and felling rain. Well, but suppose, en the other hand, you did not get a coincidence cf the high eounte with the high rains. Then that wuld eliminate the rain es 8 possitile inpertant factor and you'd have to lock for other mechanions not con nected with rain. Well, then I would invoke, first of al), lange nase movenenta of air vartionlly on isentropic surfaces. You may not have to go throwh « detatled isentropic enalysis; you may just mske uae of general metecrologisal considerations of descending aly connected with anticyalenss and things like that. In that wy I'd try te interpose possible mechanian, depenting upon how the data in exch particular onse seas to agree both metecrologically and redicectively. fo aid in the interpretation and te aid in putting forth reasonahile mechanisms, I thoroughly agree, Will, that it's just as important to have vartiosl traverses as horizontal traverses, which we're now getting. The vertical traverses are necessary, but I doen't think that they'll ever give the fine detail that is covered by the wards“the three dimensions) pleture of aloud.” I think 27 will just be an extra bit of informtion to help us decide whether it was possible for this cleud - radioactive aloud ~ to have been caught in the rain area or not, and things like thet. I don't think it will throw any Light quantitatively that will improve our understanding of vertical. diffusion. . ral aes DOE ARCHIVES