met18.dat (File 6)

This file provides hydrographic, carbon dioxide, and chemical data for the 61 stations occupied during R/V Meteor Cruise 18/1. Each line consists of a station number; cast number; sample number; bottle number; CTD pressure and temperature; potential temperature; reversing thermometer reading; CTD salinity; bottle salinity; concentrations of oxygen, silicate, nitrate, nitrite, phosphate, total carbon dioxide, and total alkalinity; 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 met18dat.for (File 3)]:

            CHARACTER bot*3, qualt*10
            INTEGER sta, cast, samp
            REAL pre, ctdtmp, theta, revtmp, ctdsal, salt, oxygen, silcat
            REAL nitrat, nitrit, phspht, tcarb, talk
            OPEN (unit=1, file='met18.dat')
            OPEN (unit=2, file='met18.data')
            write (2, 5)
     
            read (1, 10, end=999) sta, cast, samp, bot, pre, ctdtmp,
          1 revtmp, ctdsal, theta, salt, oxygen, silcat, nitrat, nitrit,
          2 phspht, talk, tcarb, qualt
     
      10    format (5X, I3, 7X, I1, 6X, I2, 5X, A3, 2X, F6.1, 1X, F9.4,
          1 1X, F8.3, 2X, F9.4, 1X, F9.4, 1X, F9.4, 2X, F6.1, 1X, F7.2,
          2 1X, F7.2, 1X, F7.2, 1X, F7.2, 1X, F7.2, 1X, F7.1, 2X, A10)
     

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	Character	3	30	32
pre	Numeric	6	35	40
ctdtmp	Numeric	9	42	50
revtmp	Numeric	8	52	59
ctdsal	Numeric	9	61	69
theta	Numeric	9	71	79
salt	Numeric	9	81	89
oxygen	Numeric	6	92	97
silcat	Numeric	7	99	105
nitrat	Numeric	7	107	113
nitrit	Numeric	7	115	121
phspht	Numeric	7	123	129
talk	Numeric	7	131	137
tcarb	Numeric	7	139	145
qualt	Character	10	148	157

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);
revtmp	-	is the reversing thermometer reading (oC);
ctdsal*	-	is the CTD salinity [on the Practical Salinity Scale (PSS)];
theta	-	is the potential temperature (oC);
salt*	-	is the bottle salinity;
oxygen*	-	is the oxygen concentration (µ mol/kg);
silcat*	-	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);
talk*	-	is the total alkalinity concentration (µ mol/kg);
tcarb*	-	is the total carbon dioxide concentration (µ mol/kg);
qualt	-	is a 10-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.