*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)]. |
Last modified: 2021-03-17T18:30:27Z
