13. Sea . Sea direction and amount are 

 coded as indicated in table 5, "Sea 

 Amount"; and table 1. 



Ik. Swell . Swell directions and amount 

 are coded as indicated in table 6, 

 "Swell Amount"; and table 1. 



15. Visibility . Visibility is coded as 

 indicated in table 7, "Visibility." 



16. Water Transparency . Given as meters 

 to which a Secchi disc is visible. 



10. 



certain elements of the organic 

 materials in sea water which react to 

 the test for carbohydrates. The car- 

 bohydrate values are given as arabinose 

 equivalents, and are not necessarily 

 the actual concentrations of carbohy- 

 drate substances. 



Proteins (Tyrosine ) . These values 

 are given to the nearest 0.1 of a unit 

 as milligrams per liter of protein 

 material in sea water, which reacts to 

 the test for tyrosine. 



Subsurface Observations 



1. Sample Depth . Observed (actual) depth 

 of each samples is given in meters. 

 Interpolated values at standard depths 

 are also given. The standard depths 

 in meters are: 0, 10, 20, 30, 50, 75, 

 100, 150, 200, 250, 300, U00, 500, 

 600, 700, 800, 1000, 1200, 1500, 2000, 

 2500, 3000, and thence every 1000 

 meters. 



2. Temperature . The centigrade tempera- 

 ture is given in degrees and hundredths. 



3- Salinity . Salinity is given in parts 

 per thousand to two decimal places. 



h. Sigma-t . To convert to density divide 

 by 1000 and add 1. Thus, a sigma-t 

 value of 22.35 converts to a density 

 of 1.02235. 



5. Dissolved Oxygen . These values are 

 given in milliliters per liter to two 

 decimal places. 



t. Total Phosphorus . Values are given in 

 microgram atoms per liter to the near- 

 est 0.1 of a unit. 



7- Inorganic Phosphate . Values are given 

 in microgram atoms per liter to the 

 nearest 0.1 of a unit. 



o. Nitrate -nitrite . These values are 

 given in microgram atoms per liter 

 to the nearest 0.5 of a unit. 



9- Carbohydrates (Arabinose ) . These 

 values are given in terms of milli- 

 grams per liter to the nearest 0.1 of 

 a unit. Collier et al. (1953) pre- 

 sented a technique for estimating 



Biological 



Plankton volumes (Gulf III and silk 

 half -meter nets ), table 8. The posi- 

 tion given is that at beginning of the 

 tow. The depth of the haul is given 

 from to the greatest depth reached. 

 The volumes as given are "wet volumes" 

 (procedures for determination were 

 given under methods in report for 

 cruise l). Very few samples contained 

 large organisms such as jellyfish 

 (which were removed), so that the 

 volumes represent smaller organisms. 



Planton volumes (Gulf LA high-speed 

 sampler ), table 9. The position given 

 is that at the center of the tow. All 

 tows were made at the surface. The 

 volumes as given are "wet volumes" 

 (procedures for determination were 

 given under methods in report for 

 cruise 1). Very few samples contained 

 large organisms such as jellyfish 

 (which were removed), so that the 

 volumes represent smaller organisms. 



Numbers of plankton organisms per 

 cubic meter of water (half -meter net ) , 

 table 10. The procedures for plankton 

 tows, methods for sorting and counting, 

 and calculations of numbers of organisms 

 were described under methods in report 

 for cruise 1. Counts are given for 

 major groups as indicated. 



Numbers of plankton organisms per 

 cubic meter of water (high-speed 

 sampler ), table 11. The procedures 

 for plankton tows, methods for sorting 

 and counting, and calculations of num- 

 bers of organisms were described undeir 

 methods for cruise 3- Counts are givfsn 

 for major groups as indicated. 



