1 1 . Humidify. Not given . 



12. Weather. Weather is coded as Indicated in Table 2, Numerical Weather 

 Codes - Present Weather . 



13. Cloud. Cloud type and amount are coded as indicated in Tables 3, Cloud 

 Type, and 4, Cloud Amount. 



14. Sea. Sea direction and amount are coded as indicated in Tables 1 and 5, 

 respectively . 



15. Swell . Swell direction and amount are coded as indicated in Tablesl and 

 6, respectively. 



16. Visib ility. Visibility is coded as indicated in Table 7, Visibility. 



17. Water. Water color, if entered, is coded as indicated in Table 8, Water 

 Color. Transparency Is coded In whole meters from observations taken with a white 

 Secchi disc (30 cm.dia.). 



C. Subsurface Observations 



STD and OBS preceding the columns of data Indicate interpolated values at 

 international standard depths (STD) and actual observed values at sampling depths 

 (OBS). 



1 . Sample Depth . Observed (actual) depth of each sample and international 

 standard depths are given in meters. 



2. Temperature, The Celsius ("C) temperature is given in degrees and 

 hundredths . 



3. Salinity. Salinity is given in parts per thousand (by weight) to two decimal 

 places . 



4. 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. Delta-D. The values in the columns are the anomalies of dynamic depths 

 from the surface to each level in dynamic meters. Each entry is the cumulative sum 

 of the anomalies of dynamic depth of the layer above . These values have been com- 

 puted for the standard depths only, and serve to identify computed points. 



6. Dissolved Oxygen. These values when given are in milliliters per liter to 

 two decimal places. Values of 10.00 or above rarely occur and are coded as 9.99. 



7. Sound Velocity. Sound velocities were computed by Wilson's equation and 

 are recorded In feet per second to one decimal place (corrected for pressure at each 

 depth). See footnote page 5. 



86 



