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The main scientific objectives of the resulting POLYMODE project 
are: 
(i) A kinematical and descriptive study of the eddy field includ- 
ing eddy-eddy interactions, on significantly longer time and large 
space scales than has until now been possible; 
(ii) The determination of local dynamical balances in a typical 
mid-oceanic region; 
(iii) The determination of contributions to the eddy transports 
of momentum, heat, and energy and their meridional distribution, 
and of the interaction of eddies with the mean circulation; 
(iv) The exploration of mechanisms of production, transforma- 
tion, and dissipation of eddy energy; 
(v) The development and testing of numerical models of 
oceanic mesoscale and of the general ocean circulation including 
(explicitly and implicitly) the mesoscale eddies for the purposes 
of forecasting, process investigation, and coupling to atmospheric 
models. 
‘Although POLYMODE involves a number of continuing scientific 
activities, the principal experiment is scheduled for 1977. A series 
of joint planning meetings are now being held periodically in both 
countries to develop updated working plan. The core of the 1977 
experiment will consist of density surveys, current meter moorings 
and SOFAR floats. 
Prior to the 1977 experiments, however, Roi field activities will 
include intercomparison cruises on the Akademik Kurchatov and an 
initial survey of the density field in the POLYMODE region aboard 
the Akademik Vernadsky. In early 1975 a joint cruise was conducted 
for the trial mooring of U.S. current meters from Soviet vessels. 
Present field programs such as POLYMODE are providing new 
data for the parameterization of small scale effects in ocean circulation 
models and should contribute to increasing the accuracy of such 
models. Both the United States and Soviet Union are active in the 
development of numerical models of ocean circulation. The United 
States has systematically been developing numerical models of ocean 
circulation which have been verified against existing temperature and 
salinity data for the World Ocean. Similarly, the Soviet Union has 
‘been active in numerical modeling of the ocean at several of its 
leading institutions, including the computer center in Novosibirsk. 
Consequently, both countries agreed that mutual benefits could be 
derived from uniting these efforts with an improvement in the present 
knowledge of large-scale ocean circulation and its interaction with 
the atmosphere. A Soviet scientist is scheduled to visit the United 
States within the next year and collaborate in studies with U‘S. 
scientists. A meeting of experts also is to be held in the United 
States to develop a program of further cooperation. 
GEOCHEMISTRY AND MARINE CHEMISTRY OF THE WORLD OCEAN 
Based on the experience from the first 2 years of the agreement 
and endeavors to identify and develop projects of common interest 
in this area, it was mutually agreed upon by the Joint Committee 
in May 1975 that cooperative investigations in geochemistry and 
marine chemistry should not be considered in a separately identified 
