b. Current Observations . Current observations were made 

 at all three anchor stations in the East Siberian Sea in 1964 (Fig. 29). 

 Current speed was obtained from Gemware, Ekman, and Hydro Products 

 meters, but current direction could be obtained only with the Gemware 

 meters. 



When possible, current observations were attempted every 

 30 minutes during station occupation. Representative coverage necessitated 

 changes in observation depths to accommodate changes in bathymetry 

 from station to station. 



In evaluating the current data, an attempt was made to disregard 

 any considered questionable. Resulting data discussed here represent 

 approximately 60% of the total collected during the BURTON ISLAND 

 survey. Although current speeds of .5 cm/sec were recorded, these 

 are unreliable since they are below the generally accepted lower 

 threshold velocity of 3 cm/sec for the Savonius rotor used in the 

 Hydro Products meter and the impellors used in the Gemware and Ekman 

 meters. These measurements most likely represent speeds too low 

 to be accurately measured with the equipment employed, and they will 

 be designated here simply as less than 3 cm/sec. 



The seven observations made 

 on station 1 in Long Strait suggested 

 that surface flow set in an easterly- 

 southeasterly direction and that 

 bottom flow set in a west-north- 

 westerly direction. Measured surface 

 current speed was less than 3 cm/sec, 

 but this is thought to be inaccurate 

 because of the ship's inability to 

 hold anchor. Actual surface current 

 speed was probably similar to that 

 recorded at 12 meters, which ranged 

 from 3 to 20 cm/sec. Flow set east- 

 southeasterly both at the surface and 

 12 meters. Near the bottom at 25 

 meters, flow set to the northwest 

 with speeds from 5 to 20 cm/sec. 



At the time of the survey near 

 71'00'N, leA'OO'E, the 17 observations 

 made on station 2 also suggested that 

 flow set east-southeasterly both at 

 the surface and at 12 meters and set 

 in a northwesterly direction near the 

 bottom. Measured surface current 

 speeds ranged from 5 to 25 cm/sec 

 setting primarily to the southeast 

 Observations at 9 meters indicated 

 flow to set in a more southerly 



KNPTS 

 1/4 1/2 3/4 I 



■ ' ■ 'l i H 



10 20 30 40 50 

 CM/SEC 



Figure 29, Observed currents are shown vectorially for a 

 1, 2, and 4, Current observation depths varied from stotio 

 but the depth at which the observation was made is indlcati 

 representative vector. Each vector represents a single curr 



chor static 

 to stotior 



39 



