7. Wind . Wind speed is given in meters 

 per second. Direction from which the 

 wind blows is coded in degrees true 

 to the nearest ten degrees. The last 

 zero is omitted. North is 36 on this 

 scale and calm is 00. See table 1, 

 "Compass Direction Conversion Table 

 for Wind, Sea, and Swell Directions". 



8. Barometer . The barometric pressure 

 is coded in millibars, neglecting the 

 900 or 1000. Thus 996 millibars is 

 coded as 96 and 1008 millibars is 

 coded as 08. 



9. Air Temperature . Dry bulb and wet 

 bulb temperatures are entered to the 

 nearest tenth of a degree (centigrade). 



10. Humidity . The percent of humidity is 

 coded directly. 



11. Weather . Weather is coded as indi- 

 cated in table 2, "Numerical Weather 

 Codes-Present Weather". 



12. Clouds . Cloud type and amount are 

 coded as indicated in table 3, "Cloud 

 Type"; and table 4, "Cloud Amount". 



13. Sea . Sea direction and amount are 

 coded as indicated in table 5, "Sea 

 Amount"; and table 1. 



14. 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. 



Salinity . Salinity is given in parts 

 per thousand to two decimal places. 



Sigma-t . To convert density divide 

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

 value of 22.35 converts to a density 

 of 1.02235. 



Dissolved Oxygen . These values are 

 given in milliliters per liter to two 

 decimal places. 



Total Phosphorus . Values are given 

 in microgram atoms per liter to the 

 nearest 0.1 of a unit. 



Inorganic Phosphate . Values are given 

 in microgram atoms per liter to the 

 nearest 0.1 of a unit. 



Nitrate-nitrite . These values are 

 given in microgram atoms per liter to 

 the nearest 0.5 of a unit. 



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 cer- 

 tain elements of the organic materials 

 in sea water which react to the test 

 for carbohydrates. The carbohydrate 

 values are given as arabinose equiva- 

 lents, and are not necessarily the 

 actual concentrations of carbohydrate 

 substances. 



Proteins (Tyrosine) . These values 

 are given to the nesirest 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 sample is given in 

 meters. Interpolated values at stcind- 

 ard depths are also given. The stand- 

 ard depths in meters are: 0, 10, 20, 

 30, 50, 75, 100, 150, 200, 250, 300, 

 400, 500, 600, 700, 800, 1000, 1200, 

 1500, 2000, 2500, 3000, and thence 

 every lOOOmeters. 



2. Temperature . The centigrade tempera- 

 ture is given in degrees and hundredths. 



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 deter- 

 mination were given under methods in 

 report for cruise 1). Very few sam- 

 ples contained large organisms such 

 as jellyfish (which were removed), so 

 that the volumes represent smaller 

 organisms. 



