p 

 t 

 h 



(m) 



POSITION OF FRONTAL ZONES 



PE 



7 



56° 



SOUTH LATITUDE 

 56° 59° 



CWB 



—X 



STATION NUMBER 

 90 91 9_2 9_3 94 95 96 97 98 99 100 102 104 106 108 110 



2 113 



114 



I 



115 116 117 118 119 120 121 

 -I 1 I— J. 1 1 



PC) 



Kcal/cm 2 



* * * ■ ■* * * 1 — i — x — x — i — i — z — m — x — iiii — z z — 



90 91 92 93 94 95 96 97 98 99 100 102 104 106 108 110 112 113 

 , STATION NUMBER 



-i — I z — z — r 



114 115 116 117 116 119 120 121 



56° 



57° 



YELCHO SECTION 5 (5-6 Jan. 1977) 



58° 59° 



SOUTH LATITUDE 



60° 



Figure 28.— Oceanographic and meteorological observations from a Ship-of-Opportunity (R/V Yelcho) crossing of 

 Drake Passage, 5-6 January 1977. 



moored in and north of the eddy indicated deep flow to the 

 west, and suggested anticyclonic circulation below 2,000 m. 

 Three XBT surveys along with the current-meter records indi- 

 cated that the eddy moved north-northeastward at an aver- 

 age speed of 3 cm/s. Figure 29 illustrates a schematic, three- 

 dimensional picture of the eddy. 



Other ISOS Studies 



A Southern Ocean Atlas of Physical and Chemical Oceano- 

 graphic data by Arnold Gordon is nearing completion. It should 

 be published in late 1979. 



The extent of international collaboration in ISOS should be 

 emphasized. During the next year, Chile and New Zealand will 

 contribute ship time and scientists to ISOS studies. Argentina, 

 Australia, and the Soviet Union will also carry out studies 

 of the circumpolar current, the former effort complementing 

 RIDGE studies. Australia, Chile, and the Soviet Union are col- 

 laborating in obtaining XBT sections for joint scientific study; 



42 



Australia and South Africa are observing the circumpolar cur- 

 rent using drogued, satellite-interrogated, drifting buoys. 

 ISOS Data 



ISOS data are available from NODC as follows: 



NODC Accession No.: 78-0194 



Organization: Texas A&M University 



Investigator: W. J. Emery (TAMU) 



Grant No.: OCE76-81371 



Project: F DRAKE 76 



Data: All XBTs are on NODC-compatible magnetic tape, were 

 taken in various parts of the southern ocean, January to 

 March 1976, and are listed by vessel, originator's cruise 

 no., NODC Ref. No., and number of XBT's: RV Profes- 

 sor Zubov, 9018ZB01, 052476, 188; RV Thalla Dan, 

 0903TD01, 052477, 173; RV Nella Dan, 0903ND01, 

 052478, 135; RV Yelcho, 2009YE04, 052479, 143; 

 RV Hero, 31296J01, 052480, 60; USCGS Northwind, 

 3106NW01, 052481, 198; USCGS Burton Island, 



