Table 



Barometer Barometric pressure given in tens, units, and tenths of 



millibars. 



Air Temp. °C Air temperature to tenths of a degree Celsius. 



Vis. Code Visibility according to WMO Code 4300. 



No. obs. depths Number of observed levels associated with the station. 



Messenger time Entered in hours and tenths of an hour GMT. For Nan- 

 sen casts, indicates time of release of messenger 

 applicable to the observational level. For STD casts, 

 indicates the starting time of lowering the sensor. 



Card type OBS designates observed levels. STD indicates the val- 

 ues at this standard level were interpolated by a 

 modified 3-point LaGrange formula. 



Depth (m.) Depth to nearest meter. A postscript T indicates depth 



was obtained thermometrically ; Z indicates uncor- 

 rected "wire out" depth. Postscript Q indicates value 

 was marked doubtful by originator; P indicates 

 value was considered doubtful by NODC. Postscripts 

 P and Q retain this meaning throughout the follow- 

 ing entries. 



T °C Temperature to hundredths of a degree Celsius. 



S %o Salinity in parts-per-thousand. 



SIGMA-T Entered to hundredths. 



Specific-volume Multiply entry by 10 ~" to obtain specific-volume anom- 

 aly in cubic centimeters per gram. 



SADDyn. M X 10^ Multiply entry by 10"' to obtain anomaly of dynamic 



depth in dynamic meters referenced to the sea 

 surface. 



Sound Velocity Sound velocity according to Wilson's formula to tenths 



of a meter per second. 



O2 ml/1 .Dissolved oxygen in milliliters per liter entered to 



hundredths. 



PO4-P ^g-at/1 Inorganic phosphate in microgram-atoms per liter en- 

 tered to hundredths. 



Total-PjU,g-at/l Total phosphorus in microgram-atoms per liter entered 



to hundredths. 



N02-N /ig-at/1 Nitrite-nitrogen in microgram-atoms per liter entered 



to hundredths. 



NO3-N |otg-at/l Nitrate-nitrogen in microgram-atoms per liter entered 



to tenths. 



Si04-Si /ig-at/1 Silicate-silicon in microgram-atoms per liter entered 



to whole units. 



pH ....Entered to hundredths. 



96 



