Theodore K. Hirota - HL 



Lloyd T. Watarai - HL 



George F. Heimerdinger - National 

 Oceanographic Data Center 



Roger B. Clapp - Smithsonian Institution 



Dayle N. Husted - Smithsonian Institution 

 Townsend Cromwell , cruise 9: 

 October 1 to 20, 1964 



Robert L. Charnell - HL - Field Party Chief 



Arthur M. Bauckham, Jr. - HL 



Robert M. Moncrief - HL 



Lloyd T. Watarai - HL 



Paul LaViolette - U.S. Naval Oceanographic 

 Office 



Dayle N. Husted - Smithsonian Institution 



Warren King - Smithsonian Institution 

 Townsend Cromwell , cruise 10: 

 November 4 to 24, 1964 



Everet C. Jones - HL - Field Party Chief 



Claude E. Allen - HL 



Arthur M. Bauckham, Jr. - HL 



Robert M. Moncrief - HL 



R. J. Grishow - U.S. Naval Oceanographic 

 Office 



Dayle N. Husted - Smithsonian Institution 



Warren King - Smithsonian Institution 



OBSERVATIONS-^ 



In addition to the regular Nansen and BT 

 casts shown in figure 1, BT casts were made 

 at 18.5-km. (10-nautical-mile) intervals for 

 studies of variability between stations 2 and 4, 

 17 and 19, and 23 and 25. 



To supplement the physical oceanographic 

 data presented in this report, additional infor- 

 mation of the following types was obtained. 



Biological 



A l/2-hour surface plankton tow was taken 

 daily at 2000 hours with a 1-m. net. Flyingfish 

 which stranded themselves on deck were col- 

 lected daily. Regular observations of fish 

 schools, sea mammals, and birds were supple- 

 mented by more detailed bird counts by ob- 

 servers from the Smithsonian Institution. 



— All data not presented in this report are on 

 file at the Bureau of Commercial Fisheries Bio- 

 logical Laboratory, Honolulu, Hawaii 96812 



Meteorological 



Rain measurements as well as standard 

 weather observations were taken four times 

 daily. Radiation from sun and sky was meas- 

 ured and recorded daily with an Eppley^' pyra- 

 nometer. These observations were supple- 

 mented by daily color photographs of clouds. 



Current 



Ten plastic-enclosed drift cards, described 

 by Barkley, Ito, and Brown (1964), were re- 

 leased at each BT cast. An additional 10 cards 

 were released at hourly intervals during the 

 first and last 12 hours of cruise 9 and during 

 the first 12 and last 9 hours of cruise 10. 



PREPARATION OF DATA 



Standard oceanographic procedures were 

 employed in the preparation of the data for this 

 report. Salinity determinations were made on 

 the University of Washington salinity bridge 

 (Paquette, 1958). Duplicate determinations 

 were made with an induction salinometer. When 

 values differed more than 0.02 °/oo, the salinity 

 was redetermined on the U.W. salinity bridge, 

 and the mean of the salinity bridge determina- 

 tions was reported. Oxygen concentrations 

 were determined by the modified Winkler 

 method (Thompson and Robinson, 1939). Inor- 

 ganic PO4-P was determined by the procedure 

 of Robinson and Thompson (1948) as modified 

 at the University of Washington. All thermom- 

 eters had been calibrated at HL since April 

 1962. The reported temperatures are esti- 

 mated to be accurate to +0.02° C. Application 

 of corrections to protected and unprotected 

 thermometer readings and computations of 

 thermometric depths and L-Z values were 

 performed with an IBM 7040 digital computer at 

 the University of Hawaii Computing Center with 

 a program written at HL. Depths were deter- 

 mined by the use of values from the L-Z curve 

 for the actual depth. This procedure gave depth 

 estimated to be within +10 m. down to 1,000 m. 

 and within +1 percent below 1,000 m. 



Sigma-t, specific volume anomaly, and the 

 dynamic height were computed on the IBM 7040 

 computer by the program prepared at HL and 

 based on equations given by LaFond (1951). 



2/ 



— Trade names referred to in this publication 



do not imply endorsement of commercial products. 



