DATASET TITLE: GEOSECS ATLANTIC, PACIFIC, INDIAN, AND MEDITERRANEAN RADIOCARBON DATA CONTRIBUTORS: H. GOTE OSTLUND TRITIUM LABORATORY ROSENSTIEL SCHOOL OF MARINE AND ATMOSPHERIC SCIENCES UNIVERSITY OF MIAMI MIAMI, FLORIDA 33149 MINZE STUIVER QUATERNARY ISOTOPE LABORATORY UNIVERSITY OF WASHINGTON SEATTLE, WASHINGTON 98195 DOI: 10.3334/CDIAC/otg.ndp027 SOURCE AND SCOPE OF THE DATA: THIS SUBDIRECTORY CONTAINS SIX ASCII TEXT FILES; THIS DOCUMENTATION FILE (NDP027.TXT), ONE FORTRAN IV (NDP027.FOR) AND ONE SAS (NDP027.SAS) RETRIEVAL PROGRAM TO READ AND PRINT ANY OF 3 GEOSECS RADIOCARBON DATA FILES, AND THE 3 DATA FILES (NDP027.IND - INDIAN OCEAN; NDP027.ATL - ATLANTIC OCEAN; AND NDP027.PAC - PACIFIC OCEAN). THESE RADIOCARBON DATA WERE EXTRACTED FROM THE GEOSECS SHOREBASED/SHIPBOARD DATA TAPE DISTRIBUTED BY THE STS/OCEANOGRAPHIC DATA FACILITY AT SCRIPPS INSTITUTION OF OCEANOGRAPHY IN LA JOLLA, CALIFORNIA. THE SAMPLING TECHNIQUE AND MEASUREMENT PROCEDURE USED IN THE RADIOCARBON DETERMINATIONS IS DESCRIBED IN A PAPER BY STUIVER ET AL. (1974). THE CO2 WAS EXTRACTED ABOARD THE SHIP FOLLOWING A METHOD MODIFIED FROM FONSELIUS AND OSTLUND (1959). THE CO2 SAMPLES WERE ABSORBED IN EXCESS NAOH, KEPT IN WELL-SEALED BOTTLES, AND SENT TO LABORATORIES FOR FURTHER PROCESSING. THE C-14 SCALE USED FOR GENERATING THE DATA IS BASICALLY THE SAME AS THE ONE PROPOSED BY BROECKER AND OLSON (1961) AND FOLLOWS THE RECOMMENDATIONS OF STUIVER AND POLACH (1977). SPECIFICALLY, THESE RECOMMENDATIONS ARE THAT THE C-14 VALUES ARE TO BE RECALCULATED TO A STANDARDIZED STATE OF ISOTOPIC FRACTION EQUIVALENT TO STANDARD WOOD (&C-13 = -25%) AND THAT THEY RELATE TO ACTIVITIES AT THE TIME OF SAMPLING. FORMAT OF THE DATA: EACH OF THE THREE RADIOCARBON DATA FILES CONTAINS HEADER INFORMATION FOLLOWED BY LINES OF DATA FOR EACH CAST AND SAMPLING DEPTH. THE FIRST HEADER RECORD FOR EACH STATION CONTAINS AN INDICATOR OF WHETHER THE STATION HAS MULTIPLE RECORDS (MREC); THE ORIGINATOR'S NATIONALITY (NATION); THE ROSETTE/NISKIN ID (ROSID); THE CANADIAN 10-DEGREE, ONE-DEGREE, TWO-DEGREE, AND FIVE-DEGREE SQUARE (SQ, ONESQ, TWOSQ, AND FIVESQ); THE HEMISPHERE OF LATITUDE (HEMLAT); LATITUDE DEGREES, MINUTES, AND TENTHS (DEGLAT, MINLAT, AND MINTEN); THE HEMISPHERE OF LONGITUDE (HEMLON); THE LONGITUDE DEGREES, MINUTES, AND TENTHS (DEGLON, MINLON, AND LONTEN); THE YEAR, MONTH, AND DAY OF SAMPLING IN GREENWICH MEAN TIME (YEAR, MONTH, AND DAY); THE ALPHANUMERIC SHIP CODE (CODE); THE DEPTH TO THE BOTTOM IN METERS (BDEPTH); THE FIRST OBSERVED DEPTH (ODEPTH); AND THE MAXIMUM SAMPLING DEPTH (SDEPTH). THESE HEADERS ARE FORMATTED AS FOLLOWS: READ(UNIT,10) MREC,NATION,ROSID,SQ,ONESQ,TWOSQ,FIVESQ,HEMLAT, 1 DEGLAT,MINLAT,MINTEN,HEMLON,DEGLON,MINLON,LONTEN,YEAR, 2 MONTH,DAY,CODE,BDEPTH,ODEPTH,SDEPTH 10 FORMAT(1X,I1,A3,9X,I2,2X,I4,I2,I2,I1,A1,I2,I2,I1,A1,I3, 1 I2,I1,1X,I2,I2,I2,3X,2A3,I5,10X,I4,I4) THE SECOND HEADER RECORD FOR EACH STATION CONTAINS THE ORIGINATOR'S CRUISE (CRUISE), THE STATION NUMBER (STATN), THE NUMBER OF OBSERVED DEPTHS (NUMOBS), AND THE NUMBER OF DETAIL DEPTHS (NUMDET). THE HEADERS ARE FORMATTED AS FOLLOWS: READ(UNIT,20) CRUISE,STATN,NUMOBS,NUMDET 20 FORMAT(14X,A3,3A3,35X,I3,2X,I3) THE LINES OF DATA WHICH FOLLOW THE TWO LINES OF HEADER INFORMATION CONTAIN THE CAST NUMBER (CAST), BOTTLE NUMBER (BOT), SAMPLE DEPTH IN METERS (DEPTH), POTENTIAL TEMPERATURE IN DEGREES CELSIUS (TEMP), SALINITY (SALIN), BIG DELTA C-14 MEASURED AT THE UNIVERSITY OF WASHINGTON (C14), AND BIG DELTA C-14 MEASURED AT THE UNIVERSITY OF MIAMI (CARB14). THE SALINITY MEASUREMENTS ARE EXPRESSED IN G/KG SEAWATER AND THE DELTA C-14 MEASUREMENTS ARE EXPRESSED PER MIL. THE DATA LINES ARE FORMATTED AS FOLLOWS: READ(UNIT,30,END=99) CAST,BOT,DEPTH,TEMP,SALIN,C14,CARB14 30 FORMAT(2X,I2,I2,2X,I5,2X,F6.3,2X,F6.3,2X,F6.1,2X,F6.1) ALL MISSING VALUES IN EACH OF THE THREE RADIOCARBON DATA FILES ARE REPRESENTED BY BLANK FIELDS. REFERENCES BAES, C.F., JR., A. BJORKSTROM, AND P.J. MULHOLLAND. 1985. UPTAKE OF CARBON DIOXIDE BY THE OCEANS. PP. 81-111, IN (J.R. TRABALKA, ED.), ATMOSPHERIC CARBON DIOXIDE AND THE GLOBAL CARBON CYCLE. U.S. DEPARTMENT OF ENERGY. CARBON DIOXIDE RESEARCH DIVISION, WASHINGTON, D.C. BROECKER, W.S., AND I.A. OLSON. 1961. LAMONT RADIOCARBON MEASUREMENTS VIII. RADIOCARBON, 3:176-204. CRAIG, H. 1974. THE GEOSECS PROGRAM: 1972-1973. EARTH AND PLANETARY SCIENCE LETTERS, 23:63-64. CRAIG, H., AND K.K. TUREKIAN. 1976. THE GEOSECS PROGRAM: 1973- 1978. EARTH AND PLANETARY SCIENCE LETTERS, 32:217-219. CRAIG, H., AND K.K. TUREKIAN. 1980. THE GEOSECS PROGRAM: 1976- 1979. EARTH AND PLANETARY SCIENCE LETTERS, 49:263-265. FONSELIUS, S., AND H.G. OSTLUND. 1959. NATURAL RADIOCARBON MEASUREMENTS ON SURFACE WATER FROM THE NORTH ATLANTIC AND THE ARCTIC SEA. TELLUS, 11:77-82. GEOSECS ATLANTIC, PACIFIC, AND INDIAN OCEAN EXPEDITIONS. 1987. SHOREBASED DATA AND GRAPHICS. VOLUME 7. OSTLUND, H.G. ED. NATIONAL SCIENCE FOUNDATION, WASHINGTON, D.C. OSTLUND, H.G., AND M. STUIVER. 1980. GEOSECS PACIFIC RADIOCARBON. RADIOCARBON, 22(1):25-53. STUIVER, M., AND H.G. OSTLUND. 1980. GEOSECS ATLANTIC RADIOCARBON. RADIOCARBON, 22(1):1-24. STUIVER, M., AND H.G. OSTLUND. 1983. GEOSECS INDIAN OCEAN AND MEDITERRANEAN RADIOCARBON. RADIOCARBON, 25(1):1-29. STUIVER, M., S.W. ROBINSON, H.G. OSTLUND, AND H.G. DORSEY. 1974. CARBON-14 CALIBRATION BETWEEN THE UNIVERSITY OF WASHINGTON AND THE UNIVERSITY OF MIAMI GEOSECS LABORATORIES. EARTH AND PLANETARY SCIENCE LETTERS, 23:65-68. STUIVER, M., AND H.A. POLACH. 1977. DISCUSSION: REPORTING OF C-14 DATA. RADIOCARBON, 19:355-363. STUIVER, M., P.D. QUAY, AND H.G. OSTLUND. 1983. ABYSSAL WATER CARBON-14 DISTRIBUTION AND THE AGE OF THE WORLD OCEANS. SCIENCE, 219:849-851.