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. |
