a5.dat (File 5)
This file provides hydrographic, carbon dioxide, and chemical data for the 112 stations occupied during the R/V Hespérides cruise along WOCE Section A5. 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, oxygen, silicate, nitrate, nitrite, phosphate, total alkalinity, total CO2, pH at 25°C, 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 a5dat.for, File 3):
CHARACTER qualt*12
INTEGER sta, cast, samp, bot
REAL pre, ctdtmp, ctdsal, ctdoxy, theta, sal, oxy, silca
REAL nitrat, nitrit, phspht, talk, tcarb, ph
read (1, 10, end=999) sta, cast, samp, bot, pre, ctdtmp,
1 ctdsal, ctdoxy, theta, sal, oxy, silca, nitrat, nitrit,
2 phspht, talk, tcarb, ph, qualt
10 format (5X, I3, 7X, I1, 6X, I2, 6X, I2, 1X, F7.1, 1X, F7.4,
1 1X, F7.4, 1X, F8.3, 1X, F7.4, 1X, F9.4, 1X, F7.1, 1X, F7.2,
2 1X, F7.2, 1X, F7.2, 1X, F7.2, 1X, F7.1, 1X, F7.1, 1X, F8.3,
3 1X, A12)
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 | 7 | 34 | 40 |
| ctdtmp | Numeric | 7 | 42 | 48 |
| ctdsal | Numeric | 7 | 50 | 56 |
| ctdoxy | Numeric | 8 | 58 | 65 |
| theta | Numeric | 7 | 67 | 73 |
| sal | Numeric | 9 | 75 | 83 |
| oxy | Numeric | 7 | 85 | 91 |
| silica | Numeric | 7 | 93 | 99 |
| nitrat | Numeric | 7 | 101 | 107 |
| nitrit | Numeric | 7 | 109 | 115 |
| phspht | Numeric | 7 | 117 | 123 |
| talk | Numeric | 7 | 125 | 131 |
| tcarb | Numeric | 7 | 133 | 139 |
| ph | Numeric | 8 | 141 | 148 |
| qualt | Character | 12 | 150 | 161 |
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); |
| talka | - | is the total alkalinity concentration (µmol/kg); |
| tcarba | - | is the total carbon dioxide concentration (µmol/kg); |
| pHa | - | is the pH at 25°C |
| qualt | - | is a 12-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. |
