.
“y
-3a-
¢
words the vertical mixing in tHe stxratosphere nad occurred
rapidly.
This is one of the seriouc assumptions which aii tue
modeis have in commoi..
There appeazs to be a considerabie speed
Wicthsywhich the stratosphere mixes, particuiariy model one assumes
essentially inctantaneous mixing though, of course, as shown in
the above remazik one need not do this and perhaps three montne
time would be a reasonable figure to use.
There wa. another tracer added in the Johnson Inland snots
by virtue of the fact these were tie fivet hydrosen bomcu ever
fired in the stratosphere.
‘*s has been cemaziked previourly, ail
of the hydrogen bomos release a conciderable amount of tritium
io7
,
but because the devices previously have always been
fired in the troposphere where a lav,e quantity of watez is
iz:corpocated in che firepali with the result that wher it rises
into the utratosphere and coois maxing the familiar white
cloud which consists of rather iarge ice crystals whicn
catcher quickiy and thus carry che tritium back to earti azain.
This did not happen for the two uevices fired over Johnson Iclarid
in the stratosphere, and therefore, we can expect that for tne
et
first time the ctratosphere has its tritium content of its water
vaised appreciabiy above the cevei it nad previouciy uue to the
cosmic rays.
The stratosphere is so Low in moisture (a faixz
extimate seemc to pe avout lo millisrams per square centimeter
of the earth's. surface for the entire stratosphere as compared
to somethin; Like 4 to 3 gram. perc square centimeter for the