Physical and Chemical Properties from Selected Expeditions in the Arctic Ocean Oceanographic Station Data (SD2) This file format is used for physical-chemical oceanographic data recorded at discrete depth levels. Most of the observations were made using multi-bottle Nansen casts or other types of water samplers. A small amount (about 5%) were obtained using electronic CTD (conductivity-temperature-depth) or STD (salinity-temperature-depth) recorders. The CTD/STD data were reported to NODC at depth levels equivalent to Nansen cast data, however, and have been processed and stored the same as the Nansen data. Cruise information, position, date and time are reported for each station. Each station contains the measurements taken at observed depth levels, but also includes data values interpolated to a set of standard depth levels. *File Structure:* Variable-length records: each observation comprises 160 characters of master (header) information plus 80 characters for each depth level (observed or standard) up to a maximum of 4,160 characters (Master Information plus 50 depth levels) per physical record; a continuation indicator is used to denote observations with more than 50 depth levels that are recorded more than one physical record. *File Format:* Oceanographic Station Data (SD2) PARAMETER DESCRIPTION START FIELD COLUMN LENGTH MASTER RECORD 1 CONTINUATION INDICATOR ONE-DIGIT CODE - INDICATES IF STATION 1 1 RECORDED ON MULTIPLE PHYSICAL RECORDS (0 = ONLY ONE RECORD FOR STATION; 1 = FIRST RECORD OF STATION; 9 = LAST RECORD OF STATION; 2-8 = INTERMEDIATE RECORDS) BLANK ONE BLANK 2 1 NODC REFERENCE NUMBER- COUNTRY TWO-CHARACTER NODC COUNTRY CODE 3 2 FILE CODE ALWAYS '5' 5 1 CRUISE XXXX - NODC CRUISE NUMBER 6 4 CONSEC XXXX - NODC CONSECUTIVE STATION NUMBER 10 4 DATA TYPE TWO-DIGIT CODE - (19 = NANSEN CAST, 22 = 14 2 NODC SELECTED DEPTHS FROM CTD/STD, 62 = ORIGINATOR SELECTED DEPTHS FROM CTD/STD) BLANK TWO BLANKS 16 2 TEN-DEGREE SQUARE FOUR-DIGIT CODE - WMO TEN-DEGREE SQUARE NUMBER 18 4 ONE-DEGREE SQUARE TWO-DIGIT CODE - WMO ONE-DEGREE SQUARE NUMBER 22 2 TWO-DEGREE SQUARE TWO-DIGIT CODE - WMO TWO-DEGREE SQUARE NUMBER 24 2 FIVE-DEGREE SQUARE ONE-DIGIT CODE - WMO FIVE-DEGREE SQUARE NUMBER 26 1 LATITUDE HEMISPHERE ONE-CHARACTER CODE - 'N' OR 'S' 27 1 LATITUDE DDMMX (DEGREES, MINUTES TO TENTHS) 28 5 LONGITUDE HEMISPHERE ONE-CHARACTER CODE - 'E' OR 'W' 33 1 LONGITUDE DDDMMX (DEGREES, MINUTES TO TENTHS) 34 6 QUARTER OF ONE-DEGREE ONE-DIGIT CODE - WMO 'QUARTER DEGREE' SQUARE 40 1 SQUARE NUMBER (= 1, 2, 3, OR 4; 9 = NOT RECORDED) DATE (GMT) YYMMDD - YEAR, MONTH, DAY 41 6 TIME (GMT) XXX (HOURS TO TENTHS) 47 3 PLATFORM TWO-CHARACTER NODC PLATFORM CODE 50 2 BLANK FOUR BLANKS 52 4 BOTTOM DEPTH XXXXX (WHOLE METERS) 56 5 EFFECTIVE DEPTH XXXX - DEPTH OF DEEPEST COMPUTED SOUND SPEED, 61 4 I.E., DEEPEST OBSERVED DEPTH AT WHICH BOTH TEMPERATURE AND SALINITY ARE REPORTED WITH NO QUALITY FLAGS (WHOLE METERS) CAST DURATION XXX - TOTAL ELAPSED TIME FOR CTD/STD CAST 65 3 (HOURS TO TENTHS) CAST DIRECTION ONE-CHARACTER CODE - (U = UP, D = DOWN, 68 1 A = AVERAGE OF UP AND DOWN CASTS, OR BLANK) SALINITY METHOD ONE-CHARACTER CODE - ('P' = PRACTICAL SALIN- 69 1 ITY, 'S' = SALINITY, BLANK = NOT SPECIFIED) DATA USE CODE ONE-DIGIT CODE - NODC INTERNAL USE ONLY 70 1 MINIMUM DEPTH ONE-DIGIT CODE - FIRST OBSERVED DEPTH WITH 71 4 VALID DEPTH, TEMPERATURE, AND SALINITY (WHOLE METERS) MAXIMUM DEPTH XXXX - DEEPEST OBSERVED DEPTH WITH ANY VALID 75 4 PARAMETER (WHOLE METERS) NEXT RECORD TYPE ALWAYS '2' 79 1 PRESENT RECORD TYPE ALWAYS '1' 80 1 MASTER RECORD 2 DEPTH DIFFERENCE XXXX - BOTTOM DEPTH MINUS MAXIMUM DEPTH 1 4 (WHOLE METERS) SAMPLE INTERVAL XX - VERTICAL SAMPLE SPACING (EFFECTIVE DEPTH 5 2 DIVIDED BY NUMBER OF VALID OBSERVED DEPTH LEVELS, TO NEAREST TENS OF METERS, E.G., 01 = 10 METERS) PERCENT SALINITY ONE-CHARACTER CODE - INDICATES PERCENT OF 7 1 OBSERVED OBSERVED DEPTH LEVELS AT WHICH SALINITY REPORTED (0 = 1 TO 9 PERCENT, ... , 9 = 90 TO 99 PERCENT, - = PARAMETER NOT RECORDED) PERCENT OXYGEN ONE-CHARACTER CODE - INDICATES PERCENT OF 8 1 OBSERVED OBSERVED DEPTH LEVELS AT WHICH DISSOLVED OXYGEN REPORTED PERCENT PHOSPHATE ONE-CHARACTER CODE - INDICATES PERCENT OF 9 1 OBSERVED OBSERVED DEPTH LEVELS AT WHICH PHOSPHATE REPORTED PERCENT TOTAL ONE-CHARACTER CODE - INDICATES PERCENT OF 10 1 PHOSPHORUS OBSERVED OBSERVED DEPTH LEVELS AT WHICH TOTAL PHOSPHORUS REPORTED PERCENT SILICATE ONE-CHARACTER CODE - INDICATES PERCENT OF 11 1 OBSERVED OBSERVED DEPTH LEVELS AT WHICH SILICATE REPORTED PERCENT NITRITE ONE-CHARACTER CODE - INDICATES PERCENT OF 12 1 OBSERVED OBSERVED DEPTH LEVELS AT WHICH NITRITE REPORTED PERCENT NITRATE ONE-CHARACTER CODE - INDICATES PERCENT OF 13 1 OBSERVED OBSERVED DEPTH LEVELS AT WHICH NITRATE REPORTED PERCENT PH OBSERVED ONE-CHARACTER CODE - INDICATES PERCENT OF 14 1 OBSERVED DEPTH LEVELS AT WHICH PH REPORTED ORIGINATOR'S CRUISE ID THREE CHARACTERS - ORIGINATOR'S CRUISE 15 3 IDENTIFIER ORIGINATOR'S STATION ID NINE CHARACTERS - ORIGINATOR'S STATION 18 9 IDENTIFIER WATER COLOR TWO-DIGIT CODE - FOREL-ULE SCALE (00-21) 27 2 WATER TRANSPARENCY XX - SECCHI DISK DEPTH (WHOLE METERS) 29 2 WAVE DIRECTION TWO-DIGIT CODE - USE NODC CODE 0110 (WMO 0885) 31 2 WAVE HEIGHT ONE-DIGIT CODE - USE NODC CODE 0104 (WMO 1555) 33 1 (BLANK IF SEA STATE PRESENT) SEA STATE ONE-DIGIT CODE - USE NODC CODE 0109 (WMO 3700) 34 1 (BLANK IF WAVE HEIGHT PRESENT) WIND FORCE TWO-DIGIT CODE - BEAUFORT SCALE - USE NODC 35 2 CODE 0052 (BLANK IF WIND SPEED PRESENT) FILE UPDATE CODE ONE-DIGIT CODE - NODC INTERNAL USE ONLY 37 1 WAVE PERIOD ONE-DIGIT CODE - USE NODC CODE 0378 (WMO 3155) 38 1 (BLANK IF SEA STATE PRESENT) WIND DIRECTION TWO-DIGIT CODE - USE NODC CODE 0110 (WMO 0877) 39 2 WIND SPEED XX - (KNOTS; BLANK IF WIND FORCE PRESENT) 41 2 BAROMETRIC PRESSURE XXXXX (MILLIBARS TO TENTHS) 43 5 DRY BULB TEMPERATURE XXXX (DEG C IN WHOLE DEGREES OR TO TENTHS; 48 4 NEGATIVE VALUE PRECEDED BY MINUS SIGN) DRY BULB TEMPERATURE ONE-DIGIT CODE - (0 = WHOLE DEGREES, 1=TENTHS 52 1 PRECISION OF DEGREE, 9 = BLANK) WET BULB TEMPERATURE XXXX (DEG C IN WHOLE DEGREES OR TO TENTHS; 53 4 NEGATIVE VALUE PRECEDED BY MINUS SIGN) WET BULB TEMPERATURE ONE-DIGIT CODE - (0 = WHOLE DEGREES, 1=TENTHS 57 1 PRECISION OF DEGREE, 9 = BLANK) WEATHER ONE- OR TWO-DIGIT CODE - USE NODC CODE 0108 58 2 (WMO 4501) OR NODC CODE 0159 (WMO 4677) CLOUD TYPE ONE-DIGIT CODE - USE NODC CODE 0053 (WMO 0500) 60 1 CLOUD AMOUNT ONE-DIGIT CODE - USE NODC CODE 0105 (WMO 2700) 61 1 COUNT OF OBSERVED XXX - NUMBER OF OBSERVED DEPTH LEVELS 62 3 DEPTHS COUNT OF STANDARD XX - NUMBER OF STANDARD DEPTH LEVELS 65 2 DEPTHS (MAXIMUM = 34) COUNT OF DETAIL DEPTHS XXX - NUMBER OF DETAIL DEPTHS (TOTAL OF 67 3 OBSERVED DEPTHS PLUS STANDARD DEPTHS) BLANK NINE BLANKS 70 9 NEXT RECORD INDICATOR EITHER '3', '4', '6', OR '7' 79 1 PRESENT RECORD ALWAYS '2' 80 1 INDICATOR OBSERVED DEPTH DETAIL RECORD OBSERVED DEPTH XXXXX (WHOLE METERS) 1 5 DEPTH QUALITY ONE-DIGIT CODE - USE NODC CODE 0608 6 1 INDICATOR THERMOMETRIC DEPTH ONE-CHARACTER CODE - 'T' INDICATES DEPTH IS 7 1 FLAG THERMOMETRICALLY DETERMINED TEMPERATURE XXXXX (DEG C; NEGATIVE VALUE PRECEDED BY MINUS 8 5 SIGN) TEMPERATURE PRECISION ONE-DIGIT CODE - (1, 2, 3 = NUMBER OF DIGITS 13 1 RIGHT OF DECIMAL POINT; 9 = BLANK) TEMPERATURE QUALITY ONE-DIGIT CODE - USE NODC CODE 0608 14 1 INDICATOR SALINITY XXXXX (PARTS PER THOUSAND OR PRACTICAL 15 5 SALINITY UNITS) SALINITY PRECISION ONE-DIGIT CODE - (1, 2, 3 = NUMBER OF DIGITS 20 1 RIGHT OF DECIMAL POINT; 9 = BLANK) SALINITY QUALITY ONE-DIGIT CODE - USE NODC CODE 0608 21 1 INDICATOR SIGMA-T XXXX (DIMENSIONLESS TO HUNDREDTHS) 22 4 SIGMA-T QUALITY ONE-DIGIT CODE - ( 8 = SIGMA-T QUESTIONABLE; 26 1 INDICATOR 9 = BLANK) SOUND SPEED XXXXX (METERS/SECOND TO TENTHS) 27 5 SOUND SPEED ONE-DIGIT CODE - (1 = NUMBER OF DIGITS RIGHT 32 1 PRECISION OF DECIMAL POINT; 9 = BLANK) OXYGEN XXXX (MILLILITERS/LITER) 33 4 OXYGEN PRECISION ONE-DIGIT CODE - (1, 2 = NUMBER OF DIGITS 37 1 RIGHT OF DECIMAL POINT; 9 = BLANK) OXYGEN QUALITY ONE-DIGIT CODE - USE NODC CODE 0608 38 1 INDICATOR DATA RANGE CHECK FLAGS ONE-DIGIT CODE - FOR FOLLOWING SIX CONDITIONS 0 = DATA IN RANGE 1 = DATA OUT OF RANGE PHOSPHATE > 4.00 39 1 TOTAL PHOSPHORUS < PHOSPHATE 40 1 SILICATE > 300.00 41 1 NITRITE > 4.0 42 1 NITRATE > 45.0 43 1 PH < 7.40 OR > 8.50 44 1 CAST START TIME OR XXX (HOURS TO TENTHS) 45 3 MESSENGER RELEASE TIME CAST NUMBER X (BLANK, OR 1-9) 48 1 INORGANIC PHOSPHATE XXXX (MICROGRAM-ATOMS/LITER) 49 4 INORGANIC PHOSPHATE ONE-DIGIT CODE - (0, 1, 2 = NUMBER OF DIGITS 53 1 PRECISION RIGHT OF DECIMAL POINT; 4 = TRACE, VALUE < 0.01; 5 = EXCEEDS, VALUE > 99.99; 9 = BLANK) TOTAL PHOSPHORUS XXXX (MICROGRAM-ATOMS/LITER) 54 4 TOTAL PHOSPHORUS ONE-DIGIT CODE - (0,1,2 = NUMBER OF DIGITS 58 1 PRECISION RIGHT OF DECIMAL POINT; 4 = TRACE, VALUE < 0.01; 5 = EXCEEDS, VALUE > 99.99; 9 = BLANK) SILICATE XXXX (MICROGRAM-ATOMS/LITER) 59 4 SILICATE PRECISION ONE-DIGIT CODE - (0,1 = NUMBER OF DIGITS 63 1 RIGHT OF DECIMAL POINT; 4 = TRACE, VALUE < 0.1; 5 = EXCEEDS, VALUE > 999.9; 9 = BLANK) NITRITE XXX (MICROGRAM-ATOMS/LITER) 64 3 NITRITE PRECISION ONE-DIGIT CODE - (0, 1, 2 = NUMBER OF DIGITS 67 1 RIGHT OF DECIMAL POINT; 4 = TRACE, VALUE < 0.01; 5 = EXCEEDS, VALUE > 9.99; 9 = BLANK) NITRATE XXX (MICROGRAM-ATOMS/LITER) 68 3 NITRATE PRECISION ONE-DIGIT CODE - (0, 1 = NUMBER OF DIGITS 71 1 RIGHT OF DECIMAL POINT; 4 = TRACE, VALUE < 0.1; 5 = EXCEEDS, VALUE > 99.9; 9 = BLANK) PH XXX (DIMENSIONLESS TO HUNDREDTHS) 72 3 PH PRECISION ONE-DIGIT CODE - (0, 1, 2 = NUMBER OF DIGITS 75 1 RIGHT OF DECIMAL POINT; 4 = TRACE, VALUE < 0.01; 5 = EXCEEDS; VALUE > 9.99; 9 = BLANK BLANK TWO BLANKS 76 2 DENSITY INVERSION FLAG ONE-DIGIT CODE - (1=SIGMA-T DECREASE GREATER 78 1 THAN 0.02; OTHERWISE = 0) NEXT RECORD TYPE EITHER '1', '3', '4', '6', OR '7' 79 1 PRESENT RECORD TYPE '3' OR '4' (3=OBSERVED DEPTH DATA FROM FIELD 80 1 MEASUREMENTS; 4 = INTERPOLATED VALUES USED AS OBSERVED VALUES FOR COMPUTATIONAL PURPOSES WHEN ORIGINAL OBSERVED VALUES MISSING) STANDARD DEPTH DETAIL RECORD DEPTH XXXXX (WHOLE METERS) 1 5 BLANK TWO BLANKS 6 2 TEMPERATURE XXXX (DEG C) 8 4 BLANK ONE BLANK 12 1 TEMPERATURE PRECISION ONE-DIGIT CODE - (2=NUMBER OF DIGITS RIGHT 13 1 OF DECIMAL POINT; 9 = BLANK) BLANK ONE BLANK 14 1 SALINITY XXXX (PARTS PER THOUSAND OR PRACTICAL 15 4 SALINITY UNITS) BLANK ONE BLANK 19 1 SALINITY PRECISION ONE-DIGIT CODE - (2 = NUMBER OF DIGITS RIGHT 20 1 OF DECIMAL POINT; 9 = BLANK) BLANK ONE BLANK 21 1 SIGMA-T XXXX (DIMENSIONLESS TO HUNDREDTHS) 22 4 SIGMA-T INDICATOR ONE-DIGIT CODE - ( 9 = BLANK) 26 1 SOUND SPEED XXXXX (METERS/SECOND) 27 5 SOUND SPEED PRECISION ONE-DIGIT CODE - (1 = NUMBER OF DIGITS RIGHT 32 1 OF DECIMAL POINT; 9 = BLANK) OXYGEN XXXX (MILLILITERS/LITER) 33 4 OXYGEN PRECISION ONE-DIGIT CODE - (2 = NUMBER OF DIGITS RIGHT 37 1 OF DECIMAL POINT; 9 = BLANK) BLANK ONE BLANK 38 1 DYNAMIC DEPTH ANOMALY XXXXX (DYNAMIC METERS) 39 5 DYNAMIC DEPTH ANOMALY ONE-DIGIT CODE -- (3=NUMBER OF DIGITS RIGHT 44 1 PRECISION OF DECIMAL POINT; 9 = BLANK) BLANK THIRTY-THREE BLANKS 45 33 DENSITY INVERSION FLAG ONE-DIGIT CODE - (1=SIGMA-T DECREASE GREATER 78 1 THAN 0.02; OTHERWISE = 0) NEXT RECORD TYPE EITHER '3', '4', '6', OR '7' 79 1 PRESENT RECORD TYPE '6' OR '7' (6 = DATA INTERPOLATED BY NODC 80 1 TO NODC STANDARD DEPTH; 7 = DATA INTERPOLATED BY ORIGINATOR TO NODC OR OTHER STANDARD DEPTH) NODC Code Tables Used with this Format - CODE CODE NUMBER NAME ------- ---- 0052 WIND FORCE (BEAUFORT) 0053 CLOUD TYPE (WMO 0500) 0104 WAVE HEIGHT (WMO 1555) 0105 CLOUD AMOUNT (WMO 2700) 0108 WEATHER (WMO 4501) 0109 SEA STATE (WMO 3700) 0110 WIND-WAVE DIRECTION (WMO 0885 OR 0877) 0159 WEATHER (WMO 4677) 0378 WAVE PERIOD (WMO 3155) 0608 QUALITY INDICATOR - - NODC COUNTRY CODE - - NODC PLATFORM (SHIP) CODE Code types used with the SD2 NODC file format.