s4p.dat (File 5)
This file provides hydrographic, CO2, and chemical data for the 113 stations occupied during the R/VAkademik Ioffe Expedition along the WOCE Section S4P. Each record contains a station number; cast number; sample number; bottle number; CTD pressure, temperature, salinity, and oxygen; potential temperature; bottle salinity; concentrations of oxygen, silicate, nitrate, nitrite, phosphate, and TCO2; pCO2; pCO2 temperature; and data-quality flags. The file is sorted by station number and pressure and can be read by using the following FORTRAN 77 code [contained in s4pdat.for (File 3)]:
CHARACTER qualt*11
INTEGER sta, cast, samp, bot
REAL pre, ctdtmp, ctdsal, ctdoxy, theta, sal, oxy, silca
REAL nitrat, nitrit, phspht, tcarb, pco2, pco2tmp
read (1, 10, end=999) sta, cast, samp, bot, pre, ctdtmp,
1 ctdsal, ctdoxy, theta, sal, oxy, silca, nitrat, nitrit,
2 phspht, tcarb, pco2, pco2tmp, qualt
10 format (5X, I3, 7X, I1, 6X, I2, 6X, I2, 1X, F7.1, 1X, F9.4,
1 1X, F9.4, 1X, F7.2, 1X, F9.4, 1X, F9.4, 1X, F7.1, 1X, F7.2,
2 1X, F7.2, 1X, F7.2, 1X, F7.2, 1X, F7.1, 1X, F7.2, 1X, F7.2,
3 1X, A11)
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 | 2 | 23 | 24 |
| bot | Numeric | 2 | 31 | 32 |
| pre | Numeric | 6 | 35 | 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 |
| silica | Numeric | 7 | 98 | 104 |
| nitrat | Numeric | 7 | 106 | 112 |
| nitrit | Numeric | 7 | 114 | 120 |
| phspht | Numeric | 7 | 122 | 128 |
| tcarb | Numeric | 7 | 130 | 136 |
| pco2 | Numeric | 7 | 138 | 144 |
| pco2tmp | Numeric | 7 | 146 | 152 |
| qualt | Character | 11 | 154 | 164 |
where
| sta | - | is the station number; |
| cast | - | is the cast number; |
| samp | - | is the sample number; |
| bot | - | is the bottle number; |
| pre | - | is the CTD pressure (in dbar); |
| ctdtmp | - | is the CTD temperature (in °C); |
| ctdsala | - | is the CTD salinity [on the Practical Salinity Scale (PSS)]; |
| ctdoxya | - | is the CTD oxygen concentration (in µmol/kg); |
| theta | - | is the potential temperature (in °C); |
| sala | - | is the bottle salinity (PSS); |
| oxya | - | is the bottle oxygen concentration (in µmol/kg); |
| silcaa | - | is the silicate concentration (in µmol/kg); |
| nitrata | - | is the nitrate concentration (in µmol/kg); |
| nitrita | - | is the nitrite concentration (in µmol/kg); |
| phsphta | - | is the phosphate concentration (in µmol/kg); |
| tcarba | - | is the total carbon dioxide concentration (in µmol/kg); |
| pco2a | - | is the partial pressure of CO2 (in µatm and measured at pco2tmp); |
| pco2tmp | - | is the temperature of equilibration of the pCO2 samples in the equilibrator (in °C); |
| qualt | - | is an 11-digit character variable that contains data-quality flag codes for each of the eleven parameters underlined with asterisks (*) in the output file. |
aVariables that are underlined with asterisks in the data file to indicate they have data-quality flags. Data-quality flags are defined as follows:
| 1 | = | sample for this measurement was drawn from water bottle but results of analyses were 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 was not drawn for this measurement from this bottle. |
