v9 q q t ALTITUDE (10° FEET) 470+io , q | T ' 195 470 460} ~ 200 Ww to 15 Aug 58)| SOF (gen (corr. lO lOO SCF 20 L 7 30F i 30 40 L i 50 60 a 70 80 —T ~T 90 0 ( 3p 90 70 | 5 ic q T T lO 60 20 / 20 C >20 50 NOE i) DP | iO 20 50 iL 60 70 1 80 90 oT T ' q ' Od 7 460 460 +50 450 jA4a0 40 | 30 } /_dpm \, 1000 0 40 al. | Rh 02 30 30 I 770 < | 40 750 l 70 | 220- - — 20 a 140 50 NORTH LATITUDE oT 20 Noo < 5 T 750 dpm (i000 ge NORTH LATITUDE | 460 ISO 100 7 40} ‘500 “1000 qT ~ 200 450+ O ALTITUDE (IO” FEET) t Ce!44, 5-90 430 (dpmAdpm) 1, aL. 30 40 | SO J 60 i 70 1 80 9% 0O j lo 1. 20 NORTH LATITUDE 1 30 ! 40 _i 50 1 60 NORTH LATITUDE Fig. 7 -- Nuclear debris in the stratosphere of the northern hemisphere, March-April 1960. j 7O = 8 9%