~
ss
_.
ne
C
be
will be made assuming the numerical median diameter to41.85,
1.0, 0.6 and 0.3 microns.
The total number of particles re~
quired aloft to reduce solar radiation by 10% when the sun is
at the senith is given by the following relations, where it is
assumed that the mean solar radiation wave length is 0,57 microns:
nxh
=
ans
=—18
s
2-22 = = - - & Buation 9
nx = Number of dust particles of radius, r, in a vertical
column of 1 cm“ cross section in the stmosphere,
& = Surface area of the earth = 5.1 x 1017 cmé
TABLE I
PARTICLE DIAMETER
IN NICRONS
TOTAL NUMBER OF -PARTICLES
REQUIRED ALOFT TO REDUCE
SOLAR RADIATION BY 0%
VALUE CF
Ke
USED
VALUE OF
X
USED.
1.85.
6.7 x 1074
3
10
1.0
1.7 x 1029
4,
5.5
0.6
5.4 x 102
4
3.3
0.3
6.1 x 1076
1.25
1.65
If it is assumed that the density of dust particles 4s 3 gm/cm3, and that all particles
are either spherical (a = b = c) or spheroids, where a = 2b = 3c, then the total
number of particles in the atomic cloud from 10 megaton weapons exploded on the surface
and subsurface is given in Table II below:
‘TABLE ii
10 Megaton Bomb
Total number of Particles in the atomic cloud assuming spherical
Subsurface
particle distribution of the atomic cloud indicated:
exploded on Surface or
and spheroidal particles for the different numerical median
SPHERICAL PARTICLES WHERE
a*bec
Surface
1.86 1.0 9.6% Gag Zs
Detonation 4x10
2.6x10
1.2x10
9,6x10
Sub-Surface
tal
Mond
"Co
3
aS
CF}
Cc
Detonation 6,6x1024 4,.2x10° a 1.921076 1,6x1027
SPHEROINAL PARTICLE WHERE |
a* 2b = 3¢
1.85 1.0 “ 0,6 0,3 —
,
25x10
1.6x10
72x10
58x10
gx1025 2.5x10° 6 1.2x1027 9,3x107?