Tracer Technique Interferences: The disposal of fission 
product wastes in the sea would constitute no direct threat to the 
14 
C method. ae could still be measured even after a lot of contamina- 
(9) 
tion has been put in, but no so with tritium. The interferences 
of a particles which fall from the atmosphere, get into the sediment 
and mix in the bottom water depends upon how much the cl content of 
(26) 
the water is changed. 
Oxygen Concentration Method to Determine Circulation: There 
are some oceanograpners who do not like to believe that it takes 
thousands of years for the vertical overturn in the North Atlantic. 
There is just too much water being transperted to high latitudes and 
too little of it coming back from high latitudes at the surface to 
permit such low retes of exchange. Formerly it was thought that 
almost every winter some surface water was made heavy enough to go to 
the bottom, but now it is realized that it does not have to go all tke 
way to the bottom. If just part of the system is overturned, the over-~ 
turn may actually be quite rapid. A different approach to the vertical 
Overturn rate was discovered recently by Velentine Worthington of the 
Woods Hole Institution. 
Worthington noticed that all of the deep ocean oxygen concentra- 
tion measurements made by North Atlantic explorations 30 years ago 
showed more oxygen in the deep water than the recent measurements. 
Both times there were a considerable number of stations covered and 
measurements were made very carefully. In comparing the two sets of 
data it has been found that they both agree in the shallow waters; 
however, below 2500 meters there is about 0.3 cc. of 0, per liter less 
