APPENDIX A.— OCEANOGRAPHIC DATA 



1. A complete description of tlie codes utilized in the tabulation of oceanographic station data can be found in 

 National Oceanographic Data Center publication M-2, ProccHsing Physical and Chemical Data from Oceanographic 

 Stations. (Rev. August 1964, supplement 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 neare.st multiple of 100 meters. 



Wave observations : 



DIR Rounded to nearest multiple of 10°. 



HGT In increments of V2 m. Sum of 5 meters plus increments of V2 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 O.jOO. 



Amount Cloud amount in eights. Entry of tlie 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 Secchl 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 



relea.se of messenger applicable to the observational level. For STD casts, indicates 



the starting time of lowering the .sen.sor. 

 Card type OBS designates ob.served 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 thermometrically ; 



Z indicates uncorrected "wire out" depth. Postscript Q indicates value was marked 



doubtful by originator : P indicates value was considered doubtful l)y NODC. Postcripts 



P and Q retain this meaning throughout the following entries. 



T °C Temperature to hundredths of a degree centigrade. 



S °/°° Salinity in parts-per-thousand. 



SIGMA-T Entered to hundredths. 



Specific-volume Multiply entry by KK to obtain specific-volume anomaly in cubic centimeters per gram. 



Anomaly x 10^ 



2iiD Dyn. M x 10' Multiply entry by lO' to olitain 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, mI/1 Dissolved oxygen in milliliters per liter entered to hundreds. 



POj-P ^g-at/1 Inorganic phosphate in microgram-atoms per liter entered to hundreds. 



Total-P Mg-at/1 Total phosphous in microgram-atoms per liter entered to hundredths. 



NO-N /ig-at/1 Nitrite-nitrogen in microgram-atoms per liter entered to hundredths. 



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



Si04Si Mg-at/1 Silicate-silicon in microgram-atoms per liter entered to whole units. 



pH Entered to hundredths. 



41 



