certain Gistaice two cropopauses exist and the tet stream occurs.
Tce is Dr. Machta’s thouyht that this phenomenology is associatea
witn a particuiariy nish leakage sate from the stratosphere;
(3) the theory of De. Marteli chat uniform mixing of the
cuevatosphere verticalsy and horizonta.1y similar to the first
model occurs for equatorial shots but that for a polar stiot thir
does not occur with a vnort residence cime of one year ox less.
The chodium-150Z having a iife of ZiJ days was released only
in the nydzo;en oomps fired nigh in tne stratosphere over
Johnson Iuland in ‘ujust.
Thuc tnic i:otope will allow us to
mea.vure the stratospheric;mixing time fcom the data whici will
become availabie ax a resuit of che vamplin,, of vainfail over
the worid and the variouc programs for taxing air filter sampiec,
coth of the stvatospnere and in the tropospneve.
These data
are not yet avaiiable but it mizgnt be interesting just to preaict
the order of ma,nitude »9ne wouid expect in vainfai..
By
assuming perfect mixing in the stratosphere in a period vf comelike three mouth. over the wiuole eaxtn, then it wovks
out that 1J) mez,acuries of these icotopes would give sometuing
ra
Qo
like 23 disintegration. per minute for lug standard cubic meters
curface air, a veacily aetectabie quantity.
There ave pres:iminary data aiveary inuicating that as eacly
as October 351 sampies for the lower vtxatosphere near the
equator at about i2°i) chowed the vhodium-ivz isotope.
ee
In other
aa
Dom ARCHIVESwe