tun1.dat (File 5)

This file provides hydrographic, CO2, and chemical data for the 123 stations occupied during the R/V Thomas Washington TUNES-1 Expedition. Each record contains a station number, cast number, sample number, bottle number, CTD pressure, CTD temperature, CTD salinity, CTD oxygen, potential temperature, bottle salinity, bottle oxygen, silicate, nitrate, nitrite, phosphate, CFC-11, CFC-12, Δ14C, 14C error, TCO2, TALK, and data-quality flags. The file is sorted by station number and pressure and can be read by using the following FORTRAN 77 code (contained in tun1dat.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, delc14, c14err
          REAL tcarb, talk

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, F7.1, 1X, F7.1, 1X, A14)

Stated in tabular form, the contents include the following:

Variable Variable type Variable width Starting olumn Ending column
sta Numeric 3 6 8
cast Numeric 1 16 16
samp Numeric 2 23 24
bot Numeric 2 31 32
pre Numeric 6 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
silica 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
delc14 Numeric 7 142 148
c14err Numeric 7 150 156
tcarb Numeric 7 158 164
talk 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;
bota  -  is the bottle number;
pre  -  is the CTD pressure (dbar);
ctdtmp  -  is the CTD temperature (°C);
ctdsala  -  is the CTD salinity (on the practical salinity scale);
ctdoxya  -  is the CTD oxygen concentration (µmol/kg);
theta  -  is the potential temperature (°C);
sala  -  is the bottle salinity;
oxya  -  is the bottle oxygen concentration (µmol/kg);
silcaa  -  is the silicate concentration (µmol/kg);
nitrata  -  is the nitrate concentration (µmol/kg);
nitrita  -  is the nitrite concentration (µmol/kg);
phsphta  -  is the phosphate concentration (µmol/kg);
cfc11a  -  is the trichlorofluoromethane-11 (CCl3F) concentration (pmol/kg);
cfc12a  -  is the dichlorodifluoromethane-12 (CCl2F2) concentration (pmol/kg);
delc14a  -  is the radiocarbon Δ14C (per mille);
c14err  -  is the error of Δ14C (percent);
tcarba  -  is the total carbon dioxide concentration (µmol/kg);
talka  -  is the total alkalinity (µmol/kg); and
qualt  -  is a 14-digit character variable that contains data-quality flag codes for parameters underlined with asterisks (*) in the output file.

aVariables that are underlined with asterisks in the data file to indicate they have data-quality flags. Data-quality flags are defined as follows:

1  =  sample for this measurement was drawn from water bottle but results of analyses were 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 was not drawn for this measurement from this bottle.

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