10. Air Temperature . Dry bulb and wet bulb temperatures are entered 

 to the nearest tenth of a degree (centigrade). A negative temperature is 

 coded by dropping the minus sign and adding 50; thus -10 is coded as 60. 



11. Humidity . The percent of hiimidity is coded directly, 100 per- 

 cent being coded as 99 ► 



12. Weather . Weather is coded as indicated under Tables Defining 

 Code Symbols - II, Numerical Weather Codes - Present Weather » 



13. Cloud > Cloud type and amount are coded as indicated under 

 Tables Defining Code Symbols - III and IV, respectively. 



14. Sea . Sea direction and amount are coded as indicated under 

 Tables Defining Code Symbols - I and V, respectively. 



15. Swell . Swell direction and amount are coded as indicated under 

 Tables Defining Code Symbols - I and VI, respectively. 



16. Visibility . Visibility is coded as indicated under Tables 

 Defining Code Sjnnbols - VII, Visibility. 



17. Water Color . Water color is coded as indicated under Tables 

 Defining Code Symbols - VIII, Water Color. 



18. Water Transparency . Water transparency is coded in whole meters 

 from observations taken with a white Secchi disc (30 cm. diam.eter). 



SUBSURFACE OBSERVATIONS 



1. Sample Depth o Observed (actual) depth of each sample 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, I50, 200, 

 250, 300, 400, 500, 600, 800, 1000, 1200, 1500, 2000, 2500, 3000, and 

 thence every 1000 meters. 



2. Temperature . The centigrade teiiiperature 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 ciimulative sum of the anomalies of dynamic depth of the layer above. 

 These values have been computed for the standard depths only, and serve 



to identify computed points. 



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