VERTICAL SECTIONS OF TEMPERATURE AND SALINITY IN THE 

 TRADE WIND ZONE OF THE CENTRAL NORTH PACIFIC, 

 FEBRUARY 1964 TO JUNE 1965 



Gunter R. Seckel 



Oceonographer 



Bureau of Commercial Fisheries Biological Laboratory 



Honolulu, Hawaii 96812 



INTRODUCTION 



This circular contains sections of the vertical temperature 

 and salinity distributions between lat. 10° and 26° N., along the 

 four meridians long. 148°, 151°, 154°, and 157° W. for each 

 month from February 1964 to June 1965, except August 1964. 



The sections are based on data collected by the R/V Town - 

 send Cromwell as part of the TWZO (Trade Wind Zone Ocea- 

 nography) Pilot Study. A fixed grid of oceanographic stations 

 (fig. 1) was occupied on a series of 16 cruises. The TWZO 

 Pilot Study was described by Seckel (1968) and the observations 

 were published by Charnell, Au. and Seckel (1967a, 1967b. 

 1967c. 1967d, 1967e. 1967f). 



.Mtliough these sections were obtained to study the mechanism 

 of change in the distribution of temperature and salinity, they 

 can. at the same time, serve the needs of applied oceanography. 

 .\ main purpose of the vertical sections presented here is to 

 serve these needs. For example, the sections can be used in 

 planning experiments or exploratory cruises in marine biology 

 and fisheries, and may also become of use in "fishery exten- 

 sion'' work, where the results of research in fishery oceanog- 

 raphy are interpreted to the fishermen. 



