depths, and dptorniiticd tpnijiprature, salinity, and 

 fii<rma-t values at stundanl levels and sifinificant 

 points in a manner described by Rosebrook 

 (1974). The output of FTNPT represented the 

 final form of the data as pre.sented in this report. 

 For the stations occupied usinjr a Plessey 0040 

 CTD profilinjr system the same acquisition and 

 processing scheme was used with one modifica- 

 tion. In program XEWDL the conductivity 

 value was converted to a salinity value usinsr 

 equations developed by Brown as presented by 

 Jaeper (1973). 



The data in its final form was proces-sed 

 fhrouffh projrram XPOKT. This pro<rram calcu- 

 lated dynamic height values relative to 1000 dbar 

 level and from those, jreostrophic currents be- 

 tween stations on a section. Dynamic heiphl 

 values for stations less than 1000 m were calcu- 

 lated relative to a 1000 dbar reference level usinc 

 a method described by Kollmeyer et. al. (19fi7). 

 based on the technique developed by Helland- 

 Hansen (1934). The method treats the sediment 

 imder the shallow stations as motionless water. 

 The technicpie is subjective and introduces some 

 uncertainty in the calculation of current and 

 transport values, particularly for the Labrador 

 Current which usually straddles the 1000 tn 

 isobath. 



For quality control a Hansen bottle with two 

 protected and two unprotected deep sea reversing 

 thermometers was placed approximately three 

 meters above the STD instnmient on each cast 

 and was tripped at the deepest depth of the cast, 

 after allowin*; sufficient soak time. Surface tem- 

 perature and water samples were obtained at 

 alternate stations by bucket. Salinity values were 

 determined by a Plessey 6220 salinometer. The 

 difference between the \ansen bottle and the re- 

 corded STD vahies yielded temperature and 

 salinity corrections. The correction values for 

 the surface and 1000 m were plotted ap:ainst time 

 for each instrument to identify periods durin<i; 

 which the instrument offset was fairly constant. 

 Within each period an average temperature and 

 salinity correction was determined. The correc- 

 tion values at mid-depth were used to check the 

 shear between the surface and the 1000 m values. 

 The surface temperature corrections were highly 

 scattered; therefore the 1000 m values were used 

 as a correction constant with tleptli and ranged 

 from +0.13°C to -0.05"C. The salinity cor- 



rection values varied from +0.0.53°/o„ to 

 -0.053%„ at the surface and 0.079%„ to 

 -O.OlTVoo at 1000 m. 



Standard Monitoring Section Occupations: The 

 standard section cruises employed both an STD 

 system and standard Xansen bottle casts at dif- 

 ferent times. The Xansen casts were processed 

 in accordance with CG 410. The STD data werti 

 recoided in analf)g form on a Tweeds and Xorthrup 

 ink pen recorder. The temperature and salinity 

 values were read from the analog trace at stand- 

 ard levels and significant points. Temi)erature 

 and salinity correction values were derived from 

 quality control samples obtained by a Nansen 

 bottle attachc<l above the STD instrument and 

 tripped at the deepest depth of the cast. 



THE DATA 



The STD data discussed above are pre-sented 

 at the end of this report. The temperature and 

 salinity distributions along each section of sta- 

 tions occupied are presented in chronological 

 order in figs. 1.5 to 49. 



CURRENT METER MEASUREMENTS 



A current meter mooring was deployed during 

 the first IIP cruise on 19 April at 45°44.0'N, 

 48°06.1'W in 305 m of water. The mooring was 

 successfully recovered during the second IIP 

 cruise on 26 June. The deployment was accom- 

 plished from the buoy deck of" the CGC EVER- 

 GREEX by an anchor-last technique. 



The mooring (fig. 2) included one AMF Cor- 

 poration vectoring averaging current meter 

 (model number 610B. serial nmnber 282), an 

 AMF Corporation acoustic release (model 284, 

 serial number 174), and an inclinometer, a depth 

 gage, and a tensiometer manufactured by General 

 Oceanics Inc. Flotation was; provided by twelve 

 16" corning glass balls in plastic hard hats. The" 

 mooring was designed through use of a computer 

 program adapted from one developed by Berteau 

 and Chhabra (1973). The results from the 

 various instruments were to be compared against 

 the mooring configuration predicted by the com- 

 puter program. 



All of the instniments functioned properly 

 with the exception of the current meter, which 

 malfunctioned and yielded no relialde data. 

 E.xamination of the meter by the manufacturer 

 indicated that the current meter malfunctioned 



