APPENDIX A.-OCEANOGRAPHIC DATA 



1. A complete description of the codes utilized in the tabulation of oceanographic station 

 data can be found in National Oceanographic Data Center publication M-2, Processing Physical 

 and Chemical Data from Oceanographic Stations. (Rev. August 1964, supplen^ent issued May 

 1966.) 



2. To facilitate use of the oceanographic station data listing, entry headings which are not 

 self-explanatory are described below. 



Entry Description of Field 



Depth to bottom Corrected or uncorrected sounding in meters. 



Maximum depth of 



samples Depth of deepest sample to nearest multiple of 100 meters. 



Wave observations: 



DIR Rounded to nearest multiple of 10°. 



HGT In increments of Vz m. Sum of 5 meters plus increments of % m if 50 is added to 



direction. 



PER If numerals 2 through 9 are entered, period in seconds is twice the numeric entry 



or 2X (numeric entry) +1. For other entries see WMO code 3155. 



SEA - Sea state according to WMO code 3700. 



Weather code If preceded by X, weather according to WMO code 4501. If a two-digit entry, 



weather according to WMO code 4677. 

 Cloud code: 



Type Cloud type according to WMO code 0500. 



Amount Cloud amount in eights. Entry of the numeral 9 indicates cloud amount could not 



be estimated. 

 Water: 



Color code Color according to Forel-Ule scale. 



Transparency Transparency in whole meters as determined by Secchi disc. 



Wind: 



Direction Rounded to nearest multiple of 10°. 



Speed or force If preceded by letter S, wind speed in knots; if preceded by letter F, wind force 



according to Beaufort scale. 



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



Air temperature, °C Air temperature to tenths of a degree centigrade. 



Visibility code Visibility according to WMO code 4300. 



Number observed depths _ _ Number of observed levels associated with the station. 



Messenger time Entered in hours and tenths of an hour GMT. For Nansen casts, indicates time of 



release of messenger applicable to the observational level. For STD casts, indi- 

 cates the starting time of lowering the sensor. 



Card type OBS designates observed levels. STD indicates the values 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 thermometric- 



ally; Z indicates uncorrected "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 following entries. 



T °C Temperature to hundredths of a degree centigrade. 



S %o Salinity in parts-per-thousand. 



SIGMA-T Entered to hundredths. 



Specific-volume Multiply entry by 10"' to obtain specific-volume anomaly in cubic centimeters per 



Anomaly xlO' gram. 



SAD Dyn. M. XlO' Multiply entry by 10"' to obtain anomaly of dynamic height in dynamic meters 



referenced to the sea surface. 



Sound velocity Sound velocity according to Wilson's formula entered to tenths of a meter per 



second. 



O, ml/1 Dissolved oxygen in milliliters per liter entered to hundredths. 



PO.-P Mg-at/1 Inorganic phosphate in microgram-atoms per liter entered to hundredths. 



Total-P Mg-at/l Total phosphous in microgram-atoms per liter entered to hundredths. 



NOj-N Mg-at/1 Nitrite-nitrogen in microgram-atoms per liter entered to hundredths. 



NO,-N Mg-at/1 Nitrate-nitrogen in microgram-atoms per liter entered to tenths. 



SiO.-Si Mg-at/1 Silicate-silicon in microgram-atoms per liter entered to whole units. 



pH _ Entered to hundredths. 



43 



