S | AIRCRAFT NO. | | 5 640)3362 (6) (10) (8) | -— XXi30 po |_AIRCRAFT NO.2 }55 Si WW, //38 o/73) ) 3 Ps °8 a(A 8 3 ow 22S88 38 NO a 76 449 — o WK oo N BO nh hh ALTITUDE, 1000 FT ye 8S £8 BB L_ | fr J f Jal 8 § | RADIOACTIVITY AND POTENTIAL VORTICITY 16 -- 14 Fig. 11—Distribution of potential vorticity computed from Fig. 8 (see Fig. 6). Apr. 22, 1963 (00Z). Strontium-90 beta activity at sampling sites in disintegrations per minute per 1000 scf. CONCLUSIONS Project Springfield provided excellent data to support the concept of tropopause folding and the formation of radioactive layers in the troposphere. The data also confirm the positive correlation between potential vorticity and radioactivity. This correlation provides a physi- cal basis for studying the movement and dispersion of radioactivity and ozone through the atmosphere. The data also confirm the accuracy of the isentropic trajectories and the importance of isentropic surfaces in analyzing atmospheric motions. REFERENCE 1, E, F. Danielsen, Project Springfield Report, Report DASA-1517, Defense Atomic Support Agency, July 1964.