tun2.dat (File 5)

This file provides hydrographic, carbon dioxide, and chemical data for the 97 stations occupied during the R/V Thomas Washington TUNES-2 Expedition. 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, CFC-11, CFC-12, and TCO₂; TALK; pCO₂; pCO₂ temperature; and data quality flags. The file is sorted by station number and pressure and may be read by using the following FORTRAN 77 code [contained in tun2dat.for (File 3)]:

            
            CHARACTER qualt*14
            INTEGER sta, cast, samp, bot 
            REAL pre, ctdtmp, ctdsal, ctdoxy, theta, sal, oxy, silca
            REAL nitrat, nitrit, phspht, cfc11, cfc12, tcarb, talk
            REAL pco2, pco2tmp
     
            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, pco2, pco2tmp, qualt
     
      10    format (5X, I3, 7X, I1, 6X, I2, 5X, I3, 1X, F7.1, 1X, F7.4,
          1 1X, F7.4, 1X, F7.1, 1X, F7.4, 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, F7.2, 1X, F7.2, 1X, A14)
     

 

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	Character	3	30	32
pre	Numeric	7	35	40
ctdtmp	Numeric	7	42	48
ctdsal	Numeric	7	50	56
ctdoxy	Numeric	7	58	64
theta	Numeric	7	66	72
sal	Numeric	9	74	82
oxy	Numeric	7	84	90
silca	Numeric	7	92	98
nitrat	Numeric	7	100	106
nitrit	Numeric	7	108	114
phspht	Numeric	7	116	122
cfc11	Numeric	8	124	131
cfc12	Numeric	8	133	140
tcarb	Numeric	7	142	148
talk	Numeric	7	150	156
pco2	Numeric	7	158	164
pco2tmp	Numeric	7	166	172
qualt	Character	14	174	187

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 (dbar);

ctdtmp - is the CTD temperature (^oC);

ctdsal* - is the CTD salinity [on the Practical Salinity Scale (PSS)];

ctdoxy - is the CTD oxygen concentration (µ mol/kg);

theta - is the potential temperature (^oC);

sal* - is the bottle salinity;

oxy* - is the oxygen concentration (µ mol/kg);

silca* - is the silicate concentration (µ mol/kg);

nitrat* - is the nitrate concentration (µ mol/kg);

nitrit* - is the nitrite concentration (µ mol/kg);

phspht* - is the phosphate concentration (µ mol/kg);

cfc11* - is the trichlorofluoromethane-11 concentration (CC₃F) (pmol/kg);

cfc12* - is the dichlorodifluoromethane-12 concentration (CC₃F₂) (pmol/kg);

tcarb* - is the total carbon dioxide concentration (µ mol/kg);

talk* - is the total alkalinity concentration (µ mol/kg);

pco2* - is the partial pressure of CO₂ (µ atm);

pco2tmp - is the temperature of equilibration of the pCO₂ samples in the equilibrator (^oC);

qualt - is a 14-digit character variable that contains data quality flag codes for parameters flagged by an asterisk (*) in the output file.

Quality flag definitions:

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.