p10pco2w.txt (File 9)

This file provides underway measurements of pCO2 in surface water during the R/V Thomas G. Thompson cruise along WOCE Section P10. Each line of the file contains a section number, sampling year, julian date (GMT), latitude, longitude, underway measurements of sea surface temperature, salinity, equilibrator temperature, atmospheric pressure, surface water xCO2 measured at equilibrator temperature, quality flag for measured xCO2, surface water xCO2 measured at sea surface temperature, and observed mole fraction of CO2 in air interpolated to the times when water measurements were made. The file is sorted by julian date and can be read by using the following FORTRAN 90 code [contained in p10pco2w.for (File 5)]:

            CHARACTER sect*8
            INTEGER year, qflag
            REAL jdate, latit, longit, surtmp, sursal, eqtmp, atmpre
            REAL xco2eq, xco2sst, xco2a
     
            read (1, 10, end=999)sect, year, jdate, latit, longit,  
          1 surtmp,sursal, eqtmp, atmpre, xco2eq, qflag, xco2sst, xco2a
          
      10    format (1X, A8, 2X, I4, 2X, F7.3, 2X, F7.3, 2X, F7.3, 2X, 
          1 F7.4, 2X, F7.4, 2X, F4.1, 2X, F6.4, 2X, F7.3, 2X, I1, 2X, 
          2 F7.3, 2X, F7.3)

Stated in tabular form, the contents include the following:

Variable Variable type Variable width Starting column Ending column
sect Character 8 2 9
year Numeric 4 12 15
jdate Numeric 7 18 24
latit Numeric 7 27 33
longit Numeric 7 36 42
surtmp Numeric 7 45 51
sursal Numeric 7 54 60
eqtmp Numeric 4 63 66
atmpre Numeric 6 69 74
xco2eq Numeric 7 77 83
qflag Numeric 1 86 86
xco2sst Numeric 7 89 95
xco2a Numeric 7 98 104

The variables are defined as follows:

sect  -  is the WOCE Section number;
year  -  is the sampling year;
jdate  -  is the julian day of the year;
latit  -  is the latitude of the sampling (in decimal degrees; negative values indicate the Southern Hemisphere);
longit  -  is the longitude of the sampling (in decimal degrees; negative values indicate the Western Hemisphere);
surtmp  -  is the sea surface temperature (°C);
sursal  -  is the sea surface salinity (on the PSS);
eqtmp  -  is the equilibrator temperature (°C);
atmpre  -  is the atmospheric pressure (atm);
xco2eq  -  is the observed mole fraction of CO2 in surface seawater at the equilibrator temperature [ppm (dry air)];
qflag  -  is the xco2eq quality flag:
2 = acceptable measurements of xco2eq;
3 = questionable measurements of xco2eq;
xco2sst  -  is the mole fraction of CO2 in surface seawater corrected to sea surface temperature [ppm (dry air)]. Temperature correction was determined from the equations of Weiss et al. (1982);
xco2a  -  is the atmospheric xCO2 concentrations interpolated to the times when water measurements were made [ppm (dry air)].

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