NARRATIVE 



On 4 September liXiS the scientific personnel 

 boarded the CGC WESTWIND at Thule AFB, 

 Greenhmd. Tiiese personnel included Robin D. 

 Muencii, Jerry A. Gait, Richard B. Tripp and 

 Robert W. AVilliscroft, all from the ITniversity 

 of Washington's Department of Oceanography; 

 Gerald O. Siebert and Gordon W. Tidmarcii 

 from the Arctic Institute of North America in 

 Montreal; and Dennis T. Brown of Dartmouth 

 College. 



The AVESTWIND was commanded by Capt. 

 J. S. Thuma, I'SCG. Coast Guard personnel 

 provided for the oceanographic program were 

 Seamen David Quidley and Howard Clinkscales, 

 who assisted in the laboratory work and operated 

 the hydrographic winch. 



A satellite ice reconnaissance report received 

 on 31 August indicated that the pack ice edge at 

 that time extended from Cape Chalon southwest- 

 ward to Cape Norton Sliaw, with ice extending 

 northward from the edge into Smith Sound. 

 This pattern was later verified by direct observa- 

 tion from the WESTWIND. 



In order to avoid operations in the pack ice as 

 much as possilile, while still obtaining adequate 

 sampling in tiie Smith Sound-Cape York area, 

 two latitudinal and two longitudinal oceano- 

 graphic sections, centred approximately on the 

 Carey Islands group (fig. 1), were planned to 

 be occupied at least twice and in as rapid suc- 

 cession as possible. Current meters were to be 

 moored in pairs at two locations; two in the cen- 

 ter of the ciiannel west of the Carey Islands and 

 two in the center of the channel north-northeast 

 of the Carey Islands, at depths of 100 and 300 

 meters (fig. 1). 



On 6 September the WESTAVIND sailed from 

 Thule to the nortliwest and moored the first re- 

 cording current meter array north-northeast of 

 the Carey Islands. On 8 September the second 

 recording current meter array was moored west 

 of the Carey Islands, altiiougli the position of the 

 pack ice edge dictated that this mooring be placed 

 somewhat east of tlie center of the channel here. 



From 8-12 September, stations 1-38 were suc- 

 cessfully completed once. By 12 September north- 

 easterly winds had cleared Smitli Sound of pack 

 ice. Therefore the longitudinal section east of the 

 Carey Islands was extended to the northward 

 (stations 39— i7) into Sniitli Sound as far as ice 

 conditions permitted. Two latitudinal sections 



were tlien occupied in Smith Sound (stations 

 45-63), and the AVESTWIND sailed southward 

 and continued tlie longitudinal section west of 

 the Carey Islands to a point due west of these 

 islands (stations 54^59). 



On 15 September, the AVESTAVIND returned 

 to Tiude for a brief layover, and on 18 Septem- 

 l)er slie sailed again and recommenced the oceano- 

 graphic survey with station 60. Following com- 

 pletion of station (i2, it was noted that the large 

 ball tloat on the firet current meter array was 

 floating at the surface rather than below it as 

 intended. This was apparently due to excessive 

 stretch of the nylon mooring line. The entire 

 array was retrieved, a section removed from the 

 mooring line, and then replaced in tlie water. 

 Stations 63-85 were then completed, thus giving 

 second occupations of the two latitudinal hydro- 

 graphic sections and the longitudinal section east 

 of the Carey Islands. After a delay due to bad 

 weather, station 86 was occupied on 23 September. 



On 24 September, all current meters were suc- 

 cessfully retrieved. It was noted that the sub- 

 surface float of the first array w-as again at the 

 surface, and that the corresponding float for the 

 second array also was at the surface. Late on 24 

 September, "the AVESTAVIND returned to Thule 

 and on 25 September the scientific crew departed 

 the vessel and tiie cruise was officially terminated. 



DATA ANALYSES 



All water temperatures were measured with 

 deep-sea reversing tliermometers supplied by the 

 University of AA'^ashington's Department of 

 Oceanography. Tiie temperature ranges of these 

 instruments were -2 to +8C°, -2 to -f 10C° and 

 — 2 to +20C°. An attempt was made to place 

 at least one of the expanded scale tliermometers 

 at each sampling depth. All thermometers had 

 been calibrated down to 0°C within the past yeai-. 

 Most of the measured temperatures fell in the 

 -1 to +2C° range, and it is felt that no signifi- 

 cant error was introduced by the lack of a — 2°C 

 calibration. Two protected thermometers were 

 used at each sampling depth. Corrected reading 

 differing by more than 0.04C° were discarded. 

 Readings differing by more than 0.0.3C° or those 

 involving thermometer malfunctions are marked 

 witli an asterisk. Accuracy of the final tempera- 

 ture data is felt to be ±0.02°C. 



Because no unprotected thermometers were 

 available, sampling depths were computed from 



