ILLUSTRATIONS 



FIGURE Page 



Frontispiece: Calibrating deep sea reversing thermometers in the POFI 

 calibration tank (Photo by E. D. Stroup) 



1. Station positions IV 



2-4. Normal and 1954 mean monthly positions of the Aleutian and Eastern 



North Pacific High and of the northeast trades and westerlies and tracks 



of the centers of the low pressure areas for January, February, and 



March 1954 18 



5. Wind data taken at bathythermograph lowerings 21 



6. Location, type and motion of frontal systems passing over the vessel 



and areas of observed precipitation 2 2 



7-16. Smoothed geopotential anomaly of isobaric surfaces relative to the 



1, 000-decibar surface 23 



17-21. Anomaly of geopotential topography relative to the 1 , 000-decibar surface 



of the 0-, 100-, 200-, 400-, and 600-decibar surfaces 29 



22. Currents measured by Geomagnetic Electrokinetograph 34 



23. GEK currents averaged by calendar day 35 



24-33. Temperature profiles 36 



34. Surface temperature and mean position of selected isotherms 42 



35. Sample trace from surface temperature recording thermograph 43 



36. Selected bathythermograph traces from 160 W. longitude transect 44 



37. Surface sigma-t 45 



38-47. Vertical sections of sigma-t 46 



48-50. Depth of 25.2, 26.0, and 26.8 sigma-t surfaces 52 



51, Surface salinity 55 



52-61. Vertical sections of salinity 56 



62-64. Plots of depth, salinity, and sigma-t at shallow salinity minimum 62 



65-67. Salinity on surfaces of constant sigma-t. 65 



68-71. Superimposed temperature-salinity curves for 160 W. , 155 W. , 147 W. , 



and 141 W., meridional station series 68 



72-81. Vertical sections of dissolved oxygen. 70 



82. Plot of dissolved oxygen at water depth of 10 meters 76 



