tun2.dat (File 5)

This file provides hydrographic, carbon dioxide, and chemical data for the 97 stations occupied during the R/V Thomas Washington TUNES-2 Expedition. Each record contains a station number; cast number; sample number; bottle number; CTD pressure, temperature, salinity, and oxygen; potential temperature; bottle salinity; concentrations of oxygen, silicate, nitrate, nitrite, phosphate, CFC-11, CFC-12, and TCO2; TALK; pCO2; pCO2 temperature; and data quality flags. The file is sorted by station number and pressure and may be read by using the following FORTRAN 77 code [contained in tun2dat.for (File 3)]:

            CHARACTER qualt*14
            INTEGER sta, cast, samp, bot 
            REAL pre, ctdtmp, ctdsal, ctdoxy, theta, sal, oxy, silca
            REAL nitrat, nitrit, phspht, cfc11, cfc12, tcarb, talk
            REAL pco2, pco2tmp
     
            read (1, 10, end=999) sta, cast, samp, bot, pre, ctdtmp,
          1 ctdsal, ctdoxy, theta, sal, oxy, silca, nitrat, nitrit,
          2 phspht, cfc11, cfc12, tcarb, talk, pco2, pco2tmp, qualt
     
      10    format (5X, I3, 7X, I1, 6X, I2, 5X, I3, 1X, F7.1, 1X, F7.4,
          1 1X, F7.4, 1X, F7.1, 1X, F7.4, 1X, F9.4, 1X, F7.1, 1X, F7.2,
          2 1X, F7.2, 1X, F7.2, 1X, F7.2, 1X, F8.3, 1X, F8.3, 1X, F7.1,
          3 1X, F7.1, 1X, F7.2, 1X, F7.2, 1X, A14)
     

Stated in tabular form, the contents include the following:

Variable Variable type Variable width Starting column Ending column
sta Numeric 3 6 8
cast Numeric 1 16 16
samp Numeric 2 23 24
bot Character 3 30 32
pre Numeric 7 35 40
ctdtmp Numeric 7 42 48
ctdsal Numeric 7 50 56
ctdoxy Numeric 7 58 64
theta Numeric 7 66 72
sal Numeric 9 74 82
oxy Numeric 7 84 90
silca Numeric 7 92 98
nitrat Numeric 7 100 106
nitrit Numeric 7 108 114
phspht Numeric 7 116 122
cfc11 Numeric 8 124 131
cfc12 Numeric 8 133 140
tcarb Numeric 7 142 148
talk Numeric 7 150 156
pco2 Numeric 7 158 164
pco2tmp Numeric 7 166 172
qualt Character 14 174 187

where

sta  -  is the station number;
cast  -  is the cast number;
samp  -  is the sample number;
bot*  -  is the bottle number;
pre  -  is the CTD pressure (dbar);
ctdtmp  -  is the CTD temperature (oC);
ctdsal*  -  is the CTD salinity [on the Practical Salinity Scale (PSS)];
ctdoxy  -  is the CTD oxygen concentration (µ mol/kg);
theta  -  is the potential temperature (oC);
sal*  -  is the bottle salinity;
xy*  -  is the oxygen concentration (µ mol/kg);
silca*  -  is the silicate concentration (µ mol/kg);
nitrat*  -  is the nitrate concentration (µ mol/kg);
nitrit*  -  is the nitrite concentration (µ mol/kg);
phspht*  -  is the phosphate concentration (µ mol/kg);
cfc11*  -  is the trichlorofluoromethane-11 concentration (CC3F) (pmol/kg);
cfc12*  -  is the dichlorodifluoromethane-12 concentration (CC3F2) (pmol/kg);
tcarb*  -  is the total carbon dioxide concentration (µ mol/kg);
talk*  -  is the total alkalinity concentration (µ mol/kg);
pco2*  -  is the partial pressure of CO2 (µ atm);
pco2tmp  -  is the temperature of equilibration of the pCO2 samples in the equilibrator (oC);
qualt  -  is a 14-digit character variable that contains data quality flag codes for parameters flagged by an asterisk (*) in the output file.

Quality flag definitions:

1 = Sample for this measurement was drawn from water bottle but analysis was not received;
2 = Acceptable measurement;
3 = Questionable measurement;
4 = Bad measurement;
5 = Not reported;
6 = Mean of replicate measurements;
7 = Manual chromatographic peak measurement;
8 = Irregular digital chromatographic peak integration;
9 = Sample not drawn for this measurement from this bottle.

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