Secchi disc and cloud cover observations 

 were made each day at local noon. The results 

 are listed in table 8. 



LABORATORY PROCEDURES 



Chemistry 



Salinity samples were placed in glass bot- 

 tles and sealed with paraffin -impregnated corks 

 and screw caps . Double titrations were made in 

 the Honolulu laboratory using a modification of 

 the Knudsen method. This modification (Van 

 Landingham 1957) results in a stoichiometric end 

 point and involves the use of an adsorption indi- 

 cator, phenosafranin, in the presence of starch 

 as a protective colloid. The surface salinities 

 at the off-station BT's are given in tables 3 

 (Smith) and 4 ( Manning ) and those for the Smith's 

 oceanographic stations in table 9. A plot of the 

 surface salinity is shown in figure 29. 



Dissolved oxygen analyses were performed 

 aboard the Hugh M. Smith by the Winkler method. 

 These results are also contained in table 9. 



The inorganic phosphate samples were 

 placed in screw-cap culture tubes, sealed with 

 plastic tape, and quick, dry -frozen for analysis 

 ashore. Analysis was performed in the Honolulu 

 laboratory using a modification of Denige's 

 method developed by Van Landingham_' . The 

 values for the surface samples taken at the off- 

 station BT's are included in tables 3 (Smith) and 

 4 (Manning) and the values for various depths at 

 the Smith's oceanographic stations 19 through 139 

 are listed in table 9. 



Oceanographic Processing 



Processing of the oceanographic data was 

 performed at the Honolulu laboratory under the 

 supervision of Mrs. M. L. Godfrey. 



The presentation of the data is similar to 

 that of King et al. (1957) in that only the observed 

 station data are listed (table 9). In order to fa- 

 cilitate further use of the data, graphs showing 

 the complete set of curves are also given for each 

 station. 



In the upper 300 meters one of the BT traces 

 tciken at the station was used as a guide in con- 



i^ Van Landingham, JohnW. MS. Stabi- 

 lizing heteropoly color in the estimation of phos- 

 phate -phosphorus in oceanic waters. U.S. Fish 

 and Wildlife Service, Bureau of Commercial 

 Fisheries, Honolulu Biological Laboratory. 



structing the temperature depth curve for the 

 reversing thernnometer readings. To insure 

 continuity among the various parameters, salin- 

 ity and oxygen are shown as curves plotted against 

 temperature rather than depth (Montgomery 

 1954). Station to station continuity was main- 

 tained by utilizing the curves for adjacent sta- 

 tions in constructing the curves for each para- 

 meter. 



Although the inorganic phosphate data are 

 included in the tabulations, they have been omit- 

 ted from the station curves. This was because 

 values in the vicinity of the oxygen minimum 

 seemed to vary erratically. This will require 

 further study and comparison with data from 

 other sources to determine whether the varia- 

 tions are real or may have been caused by hzin- 

 dling of the frozen samples. 



Isopleths of thermosteric anomaly are 

 shown on each station graph in lieu of the custom- 

 ary isopleths of sigma-t. This was done to per- 

 mit the computation of dynajmic heights by the 

 method of Montgomery and Wooster (1954). This 

 method differs from the conventional method 

 (LaFond 1951) in that the pressure terms of the 

 specific volume anomaly are neglected. The sur- 

 face heights (geostrophic currents) relative to 

 the 1,000 decibar level are shown in figure 30 to 

 indicate the general circulation through the area. 



LITERATURE CITED 



CALLAWAY, R. J. 



1957. OceJinographic and meteorological 

 observations in t h e northeast and 

 central North Pacific, July -Decem- 

 ber 1956. U. S. Fish and Wildlife 

 Service, Special Scientific Report-- 

 Fisheries No. 230. 49 p. 



GRAHAM, Joseph J. 



1959. Northeastern Pacific Albacore Sur- 

 vey, Parti. Biological observa- 

 tions, U. S. Fish and Wildlife Serv- 

 ice, Special Scientific Report--Fish- 

 eries No. 310. 33p. 



KING, J. E., T. S. AUSTIN, and M. S. DOTY 

 1957. Prelinninary report on expedition 

 EASTROPIC. U. S. Fish and Wild- 

 life Service, Special Scientific Re- 

 port--Fisheries No. 201. 155 p. 



LaFOND, E. C. 



1991. Processing oceanographic data. U. 

 S. Navy Hydrographic Office Publi- 

 cation No. 614. 114 p. 



