V. CONCLUSIONS - OT nn re C Table I indicates the total number of dust particles required aloft -adiation by 10% if the sun is at the zenith. Table II shows the est ed number of particles ej ctad aloft by 10 megaton Superweapons ~oded on the surface or su.s-surface. Hence a comparison of the values vuctained by the two tables for a given particle gize would indicate whether 10 megaton weapons can have any effect on the world climate, However, the values shown in Table II are based on scaling the cloud density o: 32C 300 lb. TNT shot with the cloud density that may be produced by a 20,000,000,000 1b. equivalent TNT shot (10 megaton Superweapon),. Certainly scaling over such a large range of values could be in error by & factor of 10 or more. Therefore, although Table II indicates that a 10 megaton weapon is capable of reducing so] - radiation significantly, it would be more realistic to assume thet fr 110 to 100 megaton weapons are required to produce significant reduction of insolation, It should be noted that in the preliminary report it was concluied that Superweapons in the energy yield range of 10 to 100 megatons may be able tH effect the climate of the world, and this conclusion remains essentially unaltered despite the more detailed analysis of the radiation scatter problem presented in this study. Since it would +eke several years for 0.6 micron particles to fall to the ground from 100,070 ft. then it is assumed that if 10 to 100 megaton weac years, they any confider should be m: 3 are exploded on the surface or underground once every few jy still be able to reduce solar radiation, In order to have in the assuned density of the explosion clouds an attempt . to sample atomic clouds to obtain the total number of particles pc anit volume of the cloud, After such experimental data is available, i will be possible to evaluate this report in more realistic terms. It is recommended that an att:npt be made te determine the total particle concentration in a INT explo:ion cloud using different amounts of high explosives at a given depth of charge burial or exploding the different amounts of TNT on the surface. This recommendation is made to determine the change in total particle concentration of an explosion cloud with different amounts of high explosives used. In order to simplify the problem of determining particle concentrations it is suggested that relatively large amounts of TNT be employed. For example, 160,000 lbs., 320,000 lbs. and 640,000 lbs. of TNT may be used at a given depth of burial, say 17 ft. underground, or all three of them may be exploded on the surface. If the cloud concentration increases perceptibly.with increase in charge, then the assumptions made in thie report may be justified. ia no marked change in eloud of TNT menti d above, then be reduced b factor of approximately 50 or 100. rea tminy .- as 1 ° ~ Fe re Re . om ome eS - Sahn’ 2 panpeentone ators EAs oy Rey 1246 9008 E34 However, if there o2%nce: -ration from the three different charges ie estimates made in this study will have to ais a ee to reduce sol: