We happened to choose a moan conditicn for continental po
air over
Burope. You will notice that there is about ten thousand
of dif-
ference in these tvo casos and to scue extent we can say
that this corres-
ponds to the change in tha height of the tropopause, bocaush
this does act
as & very Ltiportent if, but actually ‘m this case it never] aid reach the /
tropopause, end 89 ve can't rely entirely, particularly for|the low yield
bombs, on saying that tropopause ils the height at vhich it
I mentiomed cariier that one of the reasons we vere
qo.
Row
concarnpd with thie
question of heights was because wa felt that it was Lape
az to determine -
what part of the cloud could be scavenged by rain. These biuesdash lines _
represent the height to vhich the rain ia rain-bearing c ot
usually
-
goes -- the muximm height to which it goca in summer, and fhe implication
is obvious, I think, if you accept cur data, that if wa gotia beab of more
than about § KT under Hevada conditions, that all of the defris
will go
above the mucimum height of the rain in rain-bearing clauis] and therefore |
ve wouldn"t expect it to be rained out initially, we'd havd to wait for
it to come back dovn by some other mechanism before it could
be rained.
The next thing vhich we vanted to take into account was the|transport of
the debris, beth horigontally and vertically, after the
clofd stabilised.
7 y
rm
Ths gross transport is due to the wind end { think mecteprolegists can umally
provide good iInfammtion on vhere the cloud will go for thelfirst few hours,
based on upper air winds. Me can also tell how 1t will go dn the averages,
vecause we have &
arrthrenoaae :
tty good backlog
of data on upper air
effect is, of course, the shear in the atmosphere.
nds.
Another
This isla little bit
One has
mi
herder to get at, bezause it is not usually observed directly.
as