Table 7. — U.S. institutions, investigators, and projects in ISOS 



Institutions 



Columbia University 



NOAA/ERL Pacific Marine 

 Environmental Laboratory 

 Nova University 

 Oregon State University 



Texas A&M University 



University of Washington 



Investigators 



D. Giorgi 

 A. Gordon 

 S. Hayes 



M. Spillane 

 J.Allen 



R. DeSzoeke 

 L. Gordon 



V. Neal 



R. Pillsbury and 

 C. Fandry 

 W. Emery 



W. D. Nowlin and 

 J. Morrison 

 W. D. Nowlin 



D. J. Baker and 

 R. Wearn 



Woods Hole Oceanographic Institution T.Joyce 



M. McCartney 

 H. Bryden 



W. Jenkins 



Projects 



Circulation of the Southwest Atlantic Ocean 



Southern Ocean Atlas 



Macquarie Ridge Hydrographic Study 



Quasi-Geostrophic Zonal Jets 



Theoretical Studies of Time-Dependent Flow in 



the Vicinity of Drake Passage 



Baroclinic Eddy Dynamics 



Chemical Observations and Interrelationships in 



the Southern Ocean 



International Coordination 



Study of the Long-Term Variability of the Antarctic 



Circumpolar Current in the Drake Passage 



A Study of the Thermal Structure South of 



Australia 



Central Administration, Coordination, and Planning 



Chemical and Physical Oceanography of the 

 Antarctic Circumpolar Current and Frontal Zones: 

 I. Observations in the Drake Passage and Scotia 

 Sea 



Transport Measurements of the Antarctic Circum- 

 polar Current and Analysis of Existing Tidal and 

 Meteorological Data 



Dynamical Observations at the Antarctic Polar 

 Front 



Southern Ocean Water Mass Renewal and Circu- 

 lation Southeast of New Zealand 

 A Study of the Dynamics of Low-Frequency 

 Motions of the Antarctic Circumpolar Current 

 South of New Zealand 



A Study of Southern Ocean Water Mass Renewal 

 and Circulation Southeast of New Zealand Using 

 Helium Isotope and Tritium 



Ridge Interaction and Downstream Gradient 

 Experiment (RIDGE) 



In 1978, most of the ISOS experimental work will take place 

 southeast of New Zealand to study the interaction of the Antarc- 

 tic Circumpolar Current with the Macquarie Ridge. In March, 

 a cluster array of current meters on five moorings (see fig. 26) 

 will be moored at about 54°S, 175°W by the RV Tangaroa, 

 which is operated by the New Zealand Oceanographic Institute. 

 The Tangaroa will also set a near-surface mooring instru- 

 mented with thermistor chains east of Campbell Island about 

 54°S, 170°E. The RV Knorr will pick up these moorings in 

 November after doing extensive hydrographic work in the region 

 in late September and October. 



The objective of the cluster array of current meters is to study 

 the dynamics of low-frequency motions and their effects on the 



Antarctic Circumpolar Current. The region near Macquarie 

 Ridge was chosen for these measurements, because observa- 

 tional, theoretical, laboratory, and numerical model results sug- 

 gest that the interaction of the Antarctic Circumpolar Current 

 with Macquarie Ridge generates low-frequency fluctuations, and 

 that these fluctuations may be important in the overall dynamics 

 of the circumpolar current. This cluster array is an exploratory 

 array. Time series of currents and temperatures have not been 

 previously measured in the region; the primary results will be 

 estimates of energy levels and spatial and temporal scales for 

 the low-frequency motions. Poleward heat fluxes and perhaps 

 momentum fluxes should be significant, and the mechanism 

 which causes these fluxes will be explored. If these fluxes can 

 be related to large-scale gradients of temperature and vorticity, 

 the effects of the fluctuations can be parameterized in large-scale 

 models of ocean circulation. 



39 



