NDP

*water.dat files

These 10 data files contain the underway surface seawater xCO₂, atmospheric xCO₂ concentrations interpolated to the times when water measurements were made, and hydrographic measurements collected during WOCE Indian Ocean survey cruises. All files have the same ASCII format and can be read by using the following FORTRAN 77 code [contained in xco2waterdat.for (File 3)]:

           INTEGER  flag
           REAL jday, equitmp, atmpre, eqxco2, lat, lon
           REAL temp, sal, xco2sst, eaxco2
           CHARACTER sect*11, date*8, time*8

           read (1, 10, end=999) sect, date, time, jday, equitmp, 
        1 atmpre, eqxco2, flag, lat, lon, temp, sal, xco2sst, eaxco2

    10    format (1X, A11, 2X, A8, 2X, A8, 2X, F7.3, 3X, F7.4, 4X,
         1 F7.5, 5X, F7.3, 8X, I1, 2X, F8.4, 1X, F8.4, 2X, F7.4, 2X,
         2 F7.4, 4X, F7.3, 5X, F7.3)

Stated in tabular form, the contents include the following:

Variable	Variable type	Variable width	Starting column	Ending column
sect	Character	11	2	12
date	Character	8	15	22
time	Character	8	25	32
jday	Numeric	7	35	41
equitmp	Numeric	7	45	51
atmpre	Numeric	7	56	62
eqxco2	Numeric	7	68	74
flag	Numeric	1	83	83
lat	Numeric	8	86	93
lon	Numeric	8	95	102
temp	Numeric	7	105	111
sal	Numeric	7	114	120
xco2sst	Numeric	7	125	131
eaxco2	Numeric	7	137	143

The variables are defined as follows:

sect is the WOCE section number;

date is the sampling date (month/day/year);

time is the sampling time (GMT);

jday is the julian day of the year relative to 1995 with time of the day represented as a fractional day (i.e., noon on 1/1/95=1.5);

equitmp is the equilibrator temperature (°C);

atmpre is the atmospheric pressure (atm);
eqxco2 is the observed mole fraction of CO₂ in surface seawater at the equilibrator temperature [ppm (dry air)];

flag is the eqxco2 data quality flag:

2 = acceptable measurement of eqxco2;

3 = questionable measurement of eqxco2;

lat is the latitude of the sampling location (decimal degrees; negative values indicate the Southern Hemisphere);

lon is the longitude of the sampling location (decimal degrees; negative values indicate the Western Hemisphere);

temp is the sea-surface temperature (°C);

sal is the sea-surface salinity (PSS);

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);

eaxco2 is the atmospheric xCO₂ concentration interpolated to the times when water measurements were made [ppm (dry air)].


sect	is the WOCE section number;
date	is the sampling date (month/day/year);
time	is the sampling time (GMT);
jday	is the julian day of the year relative to 1995 with time of the day represented as a fractional day (i.e., noon on 1/1/95=1.5);
equitmp	is the equilibrator temperature (°C);
atmpre	is the atmospheric pressure (atm);
eqxco2	is the observed mole fraction of CO₂ in surface seawater at the equilibrator temperature [ppm (dry air)];
flag	is the eqxco2 data quality flag:
	2 = acceptable measurement of eqxco2;
	3 = questionable measurement of eqxco2;
lat	is the latitude of the sampling location (decimal degrees; negative values indicate the Southern Hemisphere);
lon	is the longitude of the sampling location (decimal degrees; negative values indicate the Western Hemisphere);
temp	is the sea-surface temperature (°C);
sal	is the sea-surface salinity (PSS);
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);
eaxco2	is the atmospheric xCO₂ concentration interpolated to the times when water measurements were made [ppm (dry air)].

akozyr 11/30/97