The procedure described to this point is a more or less standard 

 treatment of physical and chemical oceanographic data. Further analysis 

 or presentation varies and is determined by the nature of the observations 

 and the objectives of the presentation. 



PART II; S0R1E RESULTS OF THE 1950 WINIER CRUISE OF THE SMITH 



XNIRODUCnON 



Oceanographic data from the central equatorial Pacific is sparse « 

 Information has been collected by various expeditions^ the most notable 

 being the seventh cruise of the CARNEGIE during 192S=.29 but the scope and 

 objectives of this cruise did not allow a closer spacing of hydrographic 

 stations than one about every 200 miles in the equatorial Pacific region. 

 With a spacing of 60 miles between stations j, the data presented in this 

 report are the most detailed yet to be published of the region. 



PRESENTAHON OF DATA 



The station pattern for Cruise II of the SMITH was planned to cut 

 perpendicularly across the major currents of the equatorial Pacific along 

 two rather widely spaced lines (see Fig. 1) „ Two north-south lines at 

 172^ and 158% were followed (with the exception of stations 1 to 8) . 

 Stations 27-29 were not hydrographic stations. The data for each hydro- 

 graphic station appears in tabular form at the end of this report. These 

 data have been further represented by cross sections (Figs, 2-15). 



METHOD OF DRAWING CROSS SECTIONS 



In drawing the cross sections of temperature, inorganic phosphate, 

 salinity, and oxygen (FigSo 8-15) an identical method has been employed. 

 The depths of occurrence of the particular values for which isopleths are 

 drawn were read from the vertical distribution curves for each station, 

 the points plotted and the cross sections drawn. To give an objective 

 presentation^ the isopleths were drawn through all points except those 

 which were unquestionably in error, 



BRIEF DESCRIPTION OF CROSS SECTIONS 



Dynamic Height Cross Sections ( Figs , 2 and 2) » 



These sections show the smoothed profiles of isobaric surfaces with 

 respect to the 1000 decibar surface. The dots represent the actual results 

 of dynamic computations and are plotted to show what liberties with the 

 data have been taken in the smoothing process. Significant features of 

 these sections will be described under Current Sections below. 



Bathythe rmograph Sections ( Figs, ^ and ^) t 



900 ft, bathythermograph observations were made approximately every 

 10 miles along both lines of stations. The unsmoothed results are pre- 

 sented in Figs, 4- and 5, 



