-- CGC91 Master Datafile -- This file is a chronology of changes and/or additions to the master datafile for the CGC91 (Climate and Global Change '91) cruise which took place from mid February thru early April, 1991. The CGC91 dataset includes the following files: CGC91A.CSV, CGC91.QC, and CGC91.DES where the CSV file contains the data in comma- delimited format, the QC file contains the explanation of the WOCE quality control flags and the DES file is a chronological description of all changes/updates to the dataset. AOU DATA The apparent oxygen utilization, AOU (micromol/kg) is calculated as the solubility for oxygen at the measured salinity and potential temperature minus the observed oxygen concentration. The solubility for oxygen at the measured salinity and potential temperature is determined from the algorithms presented in Weiss (1970). Note that at low temperature the solubility determined by Weiss is up to 2 micromol/kg higher than determined by Benson and Krause (1984) or Garcia and Gordon (1992). Weiss, R.F., The solubility of nitrogen, oxygen, and argon in water and seawater, Deep-Sea Research, 17, 721-735, 1970. UNITS FOR THE CGC91 CRUISE Field Name Units ==================================================================== 1. STATION Station Number Integer 2. KEYFIELD Concatenation of Station Number and Sample Number integer 3. LATITUDE Decimal Degrees 4. LONGITUDE Decimal Degrees 5. PRESSURE CTD Pressure Decibar 6. SALINITY Bottle Salinity PSS-78 7. FSALINITY QC Flag for Bottle Salinity Integer 8. TEMP CTD Temperature Deg C 9. THETA Potential Temperature Deg C 10. SIGMATHETA Potential Density 11. O2 Bottle Oxygen umol/kg 12. FO2 QC Flag for O2 integer 13. AOU Apparent Oxygen Utilization umol/kg 14. PO4 Phosphate umol/kg 15. FPO4 QC Flag for PO4 integer 16. NO2 Nitrite umol/kg 17. FNO2 QC Flag for NO2 integer 18. NO3 Nitrate umol/kg 19. FNO3 QC Flag for NO3 integer 20. SIO4 Silicate - SI(OH)4 umol/kg 21. FSIO4 QC Flag for SIO4 integer 22. TCO2 Total CO2 umol/kg 23. FTCO2 QC Flag for TCO2 integer 24. TALK Total Alkalinity umol/kg 25. FTALK QC Flag for TALK integer 26. FCO220C Fugacity of CO2 at 20 C uatm 27. FCO2INSITU Fugacity of CO2 at Potential Temp uatm 28. FFCO2 QC Flag for FCO2 data integer 29. PH Acidity real number 30. FPH QC Flag for PH integer 31. CFC11 Chlorofluorocarbon-11 pmol/kg 32. FCFC11 QC Flag for CFC11 integer 33. CFC12 Chlorofluorocarbon-12 pmol/kg 34. FCFC12 QC Flag for CFC12 integer 35. CTDSAL CTD Salinity PSS-78 36. FCTDSAL QC Flag for CTD Salinity integer 37. DELC14 0/00 38. FDELC14 QC Flag for DELC14 integer 39. MONTH integer 40. DAY integer 41. YEAR integer 42. SAMPNO Sample Number integer 43. FBOTTLE Niskin Bottle QC Flag integer The most recent changes are described immediately following this sentence. ================================================================== August 23, 1999 (Dr. Peng/B. Huss) The following is the file structure for Version A of the CGC91 datafile. Structure for datafile: CGC91A.DBF Number of data records: 1870 Date of last update : 08/23/99 Field Field Name Type Width Dec Index 1 STATION Numeric 2 N 2 KEYFIELD Numeric 6 N 3 LATITUDE Numeric 9 4 N 4 LONGITUDE Numeric 9 4 N 5 PRESSURE Numeric 8 1 N 6 SALINITY Numeric 7 3 N 7 FSALINITY Integer 1 N 8 TEMP Numeric 7 3 N 9 THETA Numeric 7 3 N 10 SIGMATHETA Numeric 8 3 N 11 O2 Numeric 9 2 N 12 FO2 Integer 1 N 13 AOU Numeric 9 2 N 14 PO4 Numeric 8 2 N 15 FPO4 Integer 1 N 16 NO2 Numeric 8 2 N 17 FNO2 Integer 1 N 18 NO3 Numeric 8 2 N 19 FNO3 Integer 1 N 20 SIO4 Numeric 8 2 N 21 FSIO4 Integer 1 N 22 TCO2 Numeric 8 1 N 23 FTCO2 Integer 1 N 24 TALK Numeric 7 1 N 25 FTALK Integer 1 N 26 FCO220C Numeric 8 1 N 27 FCO2INSITU Numeric 8 1 N 28 FFCO2 Integer 1 N 29 PH Numeric 8 4 N 30 FPH Integer 1 N 31 CFC11 Numeric 8 3 N 32 FCFC11 Integer 1 N 33 CFC12 Numeric 8 3 N 34 FCFC12 Integer 1 N 35 CTDSAL Numeric 7 3 N 36 FCTDSAL Integer 1 N 37 DELC14 Numeric 6 1 N 38 FDELC14 Integer 1 N 39 MONTH Numeric 2 N 40 DAY Numeric 2 N 41 YEAR Numeric 4 N 42 SAMPNO Numeric 4 N 43 FBOTTLE Integer 1 N ** Total ** 209 July 20, 1999 (Betty Huss) Received the CGC91 data from Dave Wisegarver. Calculated AOU.