README for Chemical Analysis Data Chemical analysis data are stored in two different format files (EXCHANGE and ODV Format). Details can be found at http://www.jamstec.go.jp/mirai/MR06-05_leg1/Bottle/ The following describes several basic information including sensor information, data format, and quality flags. --- < Sensor Information > --- CTD system (1) Temperature sensor Model : SBE3, Sea-Bird Electronics,Inc. Measurement range : -5.0 to +35degC Accuracy : 0.001degC Resolution : 0.0002degC (2) Salinity sensor Model : SBE4, Sea-Bird Electronics,Inc. Measurement range : 0.0 to 7S/m Accuracy : 0.0003S/m Resolution : 0.00004S/m (3) Pressure sensor Model : SBE9plus, Sea-Bird Electronics,Inc. Measurement range : up to 10500m Accuracy : 0.015%F.S. Resolution : 0.001%F.S. (4) DO sensor Model : SBE43, Sea-Bird Electronics,Inc. Measurement range : 0-15ml/l(120% of surface saturation) Accuracy : 0.1ml/l(2% of saturation) Resolution : 0.01ml/l Chemical and Biological sampling 1. Dissolved Oxygen (1) Instruments :Burette:APB-510 manufactured by Kyoto Electronic Co. Ltd. / 10 cm3 of titration vessel Detector and Software: Automatic photometric titrator manufactured by Kimoto Electronic Co. Ltd (2) Methods :Winkler method/photometric methods (3) Precision : 0.084 umol kg-1 (4) Reference Material/CalibrationF0.001667M KIO3 solution 2. Salinity (1) Instruments:Autosal salinometer model 8400B(Guildline Instruments Ltd.) (2) Methods : - (3) Precision : 0.00014 in PSU (4) Reference Material/Calibration:IAPSO Standard Sea Water batch P147(Ocean Scientific International Ltd.) 3. Silicate (1) Instruments:TRAACS800 (Bran+Luebbe) (2) Methods :Molybdenum blue method (3) Precison :C.V. 0.07% (3.6uM) (4) Reference Material/Calibration:RMNS [Aoyama et al., submitted] and Silicate standard solution, the silicate primary standard, is obtained from Kanto Chemical CO.,Inc. This standard solution is 1000 mg per litter with 0.5 M KOH and prepared for ICP analysis. 4. Nitrate (1) Instruments:TRAACS800 (Bran+Luebbe) (2) Methods :Diazotization method (3) Precison : C.V. 0.05% (35uM), (4) Reference Material/Calibration:KNO3 solution and RMNS [Aoyama et al., submitted] 5. Nitrite (1) Instruments:TRAACS800 (Bran+Luebbe) (2) Methods :Diazotization method (reduced to nitrite by Cd - Cu tube) (3) Precison : C.V. 0.05% (1.9uM), (4) Reference Material/Calibration:NaNO2 solution and RMNS [Aoyama et al., submitted] 6. Phosphate (1) Instruments:TRAACS800 (Bran+Luebbe) (2) Methods :Molybdenum blue method (3) Precison :C.V. 0.07% (3.0uM)), (4) Reference Material/Calibration:KH2PO4 solution and RMNS [Aoyama et al., submitted] 7. pH (1) Instruments:a glass / reference electrode with a pH / Ion meter (Radiometer PHM240) (2) Methods :potentiometric methods at 25deg-C (3) Precison :The average of absolute differences between replicate samples was 0.0007 pH unit (4) Reference Material/Calibration:total hydrogen ion scale 8. Chlorophyll-a (1) Instruments:Fluorophotometer model 10-AU-005 (Turner design) (2) Methods :extract in N,N-dimethylformamide/fluorometric determination (acidification method) (3) Precison :- (4) Reference Material/Calibration:- --- < Data Format > --- 1. EXCHANGE Format Column No. Column Heading Mnemonic Units FORTRAN Format Comments 1 EXPOCODE A14 Expedition code 2 SECT A6 For WOCE data the WHP section identifier 3 STNNBR A18 Station number 4 CASTNO I3 Cast number 5 SAMPNO A7 Sample number 6 BTLNBR A7 Bottle identification number 7 BTLNBR_FLAG_W I1 Bottle quality flag 8 DATE I8 Cast date(UTC) 9 TIME UTC I4 Cast time (UTC) 10 LATITUDE deg F8.4 LATITUDE 11 LONGITUDE deg F9.4 LONGITUDE 12 DEPTH m I5 Reported depth to bottom 13 CTDDPT m F9.1 Depth 14 CTDDPT_FLAG_W I1 Quality flag for CTD data 15 CTDPRS dbar F9.1 Pressure 16 CTDPRS_FLAG_W I1 Quality flag for CTD data 17 CTDTMP ITS-90 F9.4 Temperature 18 CTDTMP_FLAG_W I1 Quality flag for CTD data 19 CTDSAL PSS-78 F9.4 CTD Salinity sensor 20 CTDSAL_FLAG_W I1 Quality flag for CTD data 21 SALNTY PSS-78 F9.4 Salinity 22 SALNTY_FLAG_W I1 Quality flags for water samples 23 CTDOXY umol/kg F9.2 CTD Oxygen sensor 24 CTDOXY_FLAG_W I1 Quality flag for CTD data 25 OXYGEN umol/kg F9.2 Oxygen 26 OXYGEN_FLAG_W I1 Quality flags for water samples 27 CHLORA MG/CUM F9.2 Chlorophyll a 28 CHLORA_FLAG_W I1 Quality flags for water samples 29 SILCAT umol/kg F9.2 Silicate 30 SILCAT_FLAG_W I1 Quality flags for water samples 31 NITRAT umol/kg F9.2 Nitrate 32 NITRAT_FLAG_W I1 Quality flags for water samples 33 NITRIT umol/kg F9.2 Nitrite 34 NITRIT_FLAG_W I1 Quality flags for water samples 35 PHSPHT umol/kg F9.3 Phosphate 36 PHSPHT_FLAG_W I1 Quality flags for water samples 37 PH - F9.3 pH 38 PH_FLAG_W I1 Quality flags for water samples 39 THETA degC F9.4 Potential temperature 40 SIG0 KG/CUM F9.4 Density 2. ODV Format Column No. Column Heading Comments 1 Cruise Cruise Label 2 Station Station number_Cast number 3 Type Station type 4 mon/day/yr Cast date(UTC) 5 hh:mm Cast time (UTC) 6 Latitude [degrees_north] LATITUDE 7 Longitude [degrees_east] LONGITUDE 8 Bot. Depth [m] Reported depth to bottom. 9 CTDDPT [M] Depth 10 QF Quality flag for CTD data 11 CTDPRS [DBAR] Pressure 12 QF Quality flag for CTD data 13 CTDTMP [ITS-90] Temperature 14 QF Quality flag for CTD data 15 CTDSAL [PSS-78] CTD Salinity sensor 16 QF Quality flag for CTD data 17 SALNTY [PSS-78] Salinity 18 QF Quality flags for water samples 19 CTDOXY [UMOL/KG] CTD Oxygen sensor 20 QF Quality flag for CTD data 21 OXYGEN [UMOL/KG] Oxygen 22 QF Quality flags for water samples 23 CHLORA [MG/CUM] Chlorophyll a 24 QF Quality flags for water samples 25 SILCAT [UMOL/KG] Silicate 26 QF Quality flags for water samples 27 NITRAT [UMOL/KG] Nitrate 28 QF Quality flags for water samples 29 NITRIT [UMOL/KG] Nitrite 30 QF Quality flags for water samples 31 PHSPHT [UMOL/KG] Phosphate 32 QF Quality flags for water samples 33 PH pH 34 QF Quality flags for water samples 35 THETA [DEG C] Potential temperature 36 QF Quality flag for CTD data 37 SIG0 [KG/CUM] Density 38 QF Quality flag for CTD data 39 SAMPNO Sample number 40 QF Bottle quality flag --- < Quality Flags (Definition) > --- EXCHANGE Format For Bottle 1 = Bottle information unavailable. 2 = No problems noted. 3 = Leaking. 4 = Did not trip correctly. 5 = Not reported. 7 = Unknown problem. 9 = Samples not drawn from this bottle. For water samples 1 = Smaple for this measurement was drawn from water bottle but analysis not received. 2 = Acceptable measurement. 3 = Questionable measurement. 4 = Bad measurement. 5 = Not reported. 6 = Mean of replicate measurements. 9 = Sample not drawn for this measurement from this bottle. For CTD data 1 = Not calibrated. 2 = Acceptable measurement. 3 = Questionable measurement. 4 = Bad measurement. 5 = Not reported. 6 = Interpolated over >1 dbar interval. 7 = Despiked. 9 = Not sampled. ODV Format For Bottle, water samples, and CTD data 0 = good 1 = unknown 4 = questionable 8 = bad ------------------------------------------ end ------------------------------------------