p13.dat (File 5)


This file provides hydrographic, carbon dioxide, and chemical data for the 82 stations occupied during the R/V John V. Vickers cruise along WOCE Section P13. Each line consists of 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, total CO2, total alkalinity, and data-quality flags. The file is sorted by station number and pressure and can be read by using the following FORTRAN 90 code (contained in p13dat.for, File 3):

            INTEGER sta, cast, samp, bot 
            REAL pre, ctdtmp, ctdsal, ctdoxy, theta, sal, oxy, silca
            REAL nitrat, nitrit, phspht, cfc11, cfc12, tcarb, talk
            CHARACTER qualt*13
     
            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, qualt
     
      10    format (5X, I3, 7X, I1, 5X, I3, 4X, I4, 1X, F7.1, 1X, F9.4,
            1 1X, F9.4, 1X, F7.1, 1X, F9.4, 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, A13)

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 3 22 24
bot Numeric 4 29 32
pre Numeric 7 34 40
ctdtmp Numeric 9 42 50
ctdsal Numeric 9 52 60
ctdoxy Numeric 7 62 68
theta Numeric 9 70 78
sal Numeric 9 80 88
oxy Numeric 7 90 96
silca Numeric 7 98 104
nitrat Numeric 7 106 112
nitrit Numeric 7 114 120
phspht Numeric 7 122 128
cfc11 Numeric 8 130 137
cfc12 Numeric 8 139 146
tcarb Numeric 7 148 154
talk Numeric 7 156 162
qualt Character 13 164 176

The variables are defined as follows:

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 (PSS)];
ctdoxya  -  is the CTD oxygen (µmol/kg);
theta  -  is the potential temperature (°C);
sala  -  is the bottle salinity (on the PSS);
oxya  -  is the oxygen concentration (µmol/kg);
silicaa  -  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 chlorofluorocarbon 11 consentration (pmol/kg)
cfc12a  -  is the chlorofluorocarbon 12 consentration (pmol/kg)
tcarba  -  is the total carbon dioxide concentration (µmol/kg);
talka  -  is the total alkalinity concentration (µmol/kg);
qualt  -  is a 13-digit character variable that contains data-quality flag codes for parameters underlined with asterisks (*******) in the file header.

aVariables that are underlined with asterisks in the data file's header indicate they have a data-quality flag. Data-quality flags are defined as follows:

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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