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statement are the areas of upwelling where surface water
is being pushed away from a land mass by the wind and is
being replaced by intermediate water.
In an area of up-
welling, vertical movement is still slow but may be one
or two meters a day.
Other areas of upwelling are found
along current boundaries.
Circulation of water in the
deep oceqn is also influenced by high submarine ridges
which may be comparable in height to mountain ranges on
land.
The ridges restrict circulation and if circular in
shape can create basins of isolated water.
There is a need
for more information on the circulation of the deep waters
of the ocean in order that predictions of the fate of radioisotopes introduced into the sea may be made.
Distribution and biological uptake of fallout in
the ocean are influenced by the size and solubility of the
fallout particles which,
in turn,
are determined by the size
of the detonation and the type of soils
(or water)
in the
vicinity of the detonation.
A detonation may be classified, arbitrarily, as
large or small, depending upon the height attained by the
cloud formed by the detonation.
A large detonation is
‘one in which the cloud reaches the stratosphere and the *