Total records = 102,523 (or -7.1 mB)
^αFB = fixed block.
^βSAS is the registered trademark of SAS Institute, Inc., Cary, NC 27511-8000.

12. Descriptive File on the Tape/Diskettes

The following is a listing of File 1 on the magnetic tape (or NDP044.DES on the floppy diskettes) distributed by CDIAC. This file is intended to complement the documentation and provide details (i.e., variable descriptions, formats, and units) about the data files on the magnetic tape or floppy diskettes.

Title of the Data Set

Surface Water and Atmospheric Carbon Dioxide and Nitrous Oxide Observations by Shipboard Automated Gas Chromatography: Results from Expeditions between 1977 and 1990.

Data Contributors

R. F. Weiss, F. A. Van Woy, P. K. Salameh
Scripps Institution of Oceanography
University of Calfornia, San Diego
La Jolla, California

Source and Scope of the Data

Note: The material provided on the magnetic tape or floppy diskettes for this section is essentially identical to the contents of Sections 4 (Source Information) and 5 (Methodology) of Part I of this documentation.

Data Format

Eighty-seven files are provided on this magnetic tape or these floppy diskettes, including (1) this descriptive file - File 1 on the magnetic tape or NDP044.DES on the floppy diskettes; (2) a file containing a list of expedition legs on which measurements were made - File 2 on the magnetic tape or TRACK.LST on the floppy diskettes; (3) a file containing a list of the data filenames corresponding (by number) to the expedition legs listed in File 2 (or TRACK.LST) - File 3 on the magnetic tape or DATA.LST on the floppy diskettes; (4) a FORTRAN-77 retrieval program to read and print any of the data files - File 4 on the magnetic tape or NDP044.FOR on the floppy diskettes; (5) a SAS input/output routine to read and print any of the data files - File 5 on the magnetic tape or NDP044.SAS on the floppy diskettes; and (6) - (87) 82 files containing the surface water and atmospheric CO₂ and N₂O data - Files 6-87 on the magnetic tape or *.AIR and *.H2O on the floppy diskettes [with full filenames as listed in File 3 (or DATA.LST)].

Table 2 (located in the documentation that accompanies this tape/diskettes) presents a partial listing of one of the surface water and atmospheric CO₂ and N₂O data files. The data files are formatted in the following way:

	CHARACTER SAMPTYP, HEADER*77, DATEMO*3, LATHEM, LONHEM
	INTEGER DATADA, DATEYR, TIME
	REAL LAT, LON, PRESS, H2OTMP, XN2O, XCO2
	READ (5, 500) SAMPTYP, HEADER
   10	READ (5, 600, END=800) DATEDA, DATEMO, DATEYR, TIME,
1	LAT, LATHEM, LON, LONHEM, PRESS, H2OTMP, XN20, XCO2
   GOTO 10
  500	FORMAT (A1, 2X, A77)
  600   FORMAT (I2, IX, A3, IX, I2, 3X, I4, 3X, F7.3, 1X, A1, 3X, F8.3, 
1

 1X, A1, 3X, F6.1, 3X, F5.2, 3X, F5.A, 3X, F5.1)
  800   STOP

where

SAMPTYP	is a one-character code describing the type of samples being presented in the data file: A = atmospheric samples, S = surface seawater (i.e., gas equilibrated with surface seawater) samples;
HEADER	is a descriptive character string consisting of (1) the name of the expedition (e.g., AJAX Leg 1) and (2) the name of the research vessel (e.g., R/V Knorr);
DATEDA	is the numeric day of the month on which the sample was collected;
DATEMO	is the three-letter abbreviation (Jan, Feb, etc.) for the month in which the sample was collected;
DATEYR	is the final two digits of the year (since 1900) in which the sample was collected;
TIME	is the Greenwich Mean Time at which the sample was collected, expressed in 24-hour time from 0000 to 2359;
LAT	is the latitude (in decimal degrees) at which the sample was collected, with possible values from -90,000 to 90,000 (north latitudes are represented as positive);
LATHEM	is the latitudinal hemisphere in which the sample was taken; N = Northern Hemishpere, S = Southern Hemisphere;
LON	is the longitude (in decimal degrees) at which the sample was collected, with possible values from -180,000 to 180,000 (east longitudes are represented as positive);
LONHEM	is the longitudinal hemisphere in which the sample was taken: E = Eastern Hemisphere, W = Western Hemisphere;
PRESS	is the approximate sea level barometric pressure in mBar, interpolated from discrete values recorded on the ship at hydrographic stations;
H2OTMP	is the approximate surface water temperature in degrees Celsius, interpolated from discrete values recorded on the ship at hydrographic stations;
XN2O	is the dry gas mole fraction of nitruos oxide (N2O) in the sample, measured in parts per billion (ppb);
XCO2	is the dry gas mole fraction of carbon dioxide(CO2) in the sample, measured in parts per million (ppm);

Stated in tabular form, the contents include the following:

Variableα	Variable Type	Variable Widthβ	Line	Starting Column	Ending Column
SAMPTYP	Character	Al	1	1	1
HEADER	Character	A77	1	4	80
DATEDA	Numeric	I2	2...n	1	2
DATEMO	Character	A3	2...n	4	6
DATEYR	Numeric	12	2...n	8	9
TIME	Numeric	I4	2...n	13	16
LAT	Numeric	F73	2...n	20	26
LATHEM	Character	Al	2...n	28	28
IAN	Numeric	F8.3	2...n	32	39
LONHEM	Character	Al	2...n	41	41
PRESS	Numeric	F6.1	2...n	45	50
H2OTMP	Numeric	F5.2	2...n	54	58
XN2O	Numeric	F5.1	2...n	62	66
XCO2	Numeric	F5.1	2...n	70	74

^αMissing values are represented as follows - PRESS: -999.9; H2OTMP: 99.99; XN2O: -99.9; XCO2:-99.9.
^βValues for variable width are entered as FORTRAN 77 format codes.

References

Note: The material provided on the magnetic tape or floppy diskettes for this secion is identical to the contents of Section 9 (References) of Part I of this document

13. Listing of the FORTRAN-77 Data Retrieval Program

The following is a listing of the FORTRAN-77 data retrieval program (File 4 on magnetic tape or NDP044.FOR on floppy diskette) provided by CDIAC to read and pring the surface water and atmospheric CO₂ and N₂O data (Files 6-87 on magnetic tape or files *.AIR and *.H2O on floppy diskettes). The job control language (JCL) statements (preceded by // or /*) shown below are not provided in the file on the tape/diskette; requestors must add JCL statement themselves if required. The statments required will vary for each operating system. The JCL statements shown below are provided to illustrate the statements that an individual using an IBM mainframe (e.g., IBM 3090) at ORNL would need to read these data from a nine-track, 6250 BPI, standard-labeled tape with character written in EBCDIC.

//UTDCO2 JOB(12345), 'USER ADDRESS'
//OUT OUTPUT DEFAULT=YES,JESDS=ALL,DEST=LOCAL
//EXEC FORTVCLG
//FORT.SYSIN DD =

C*************************************************************
C A FORTRAN program to read and print the surface water and
C   atmospheric carbon dioxide and nitrous oxide data.
C
C*************************************************************

	CHARACTER SAMPTYP, HEADER*77, DATEMO*3, LATHEM, LONHEM
	INTEGER DATEDA, DATEYR, TIME
	REAL LAT, LON, PRESS, H2OTMP, XN2O, XCO2
	READ (5, 500) SAMPTYP, HEADER
	WRITE (6, 500) SAMPTYP, HEADER
     10 READ (5, 600, END=800) DATEDA, DATEMO, DATEYR, TIME, LAT,
       1   LATHEM, LON, LONHEM, PRESS, H2OTMP, XN2O, XCO2
        WRITE (6, 650 DATEDA, DATEMO, DATEYR, TIME, LAT,
       1   LATHEM, LON, LONHEM, PRESS, H2OTMP, XN2O, XCO2
        GOTO 10
    500 FORMAT (A1, 2X, A77)
    600 FORMAT (I2, 1X, A3, 1X, I2, 3X, I4, 3X, F7.3, 1X, A1, 3X, F8.3, 1X, A1, 
       1        3, F6.1, 3X, F5.2, 3X, F5.1, 3X, F5.1)
    650 FORMAT (I2, 1X, A3, 1X, I2, 3X, I4.4, 3X, F7.3, 1X, A1, 3X, F8.3, 1X,
       1        A1, 3X, F6.1, 3X, F5.2, 3X, F5.1, 3X, F5.1, '       ')
    800 STOP
        END
/*
//GO.FT05F001 DD UNIT=TAPE62, VOL=SHR=TAPEVOL, DISP=(,PASS),
// LABEL=(4, SL, RETPD=0),
// DSN=TAB.NDP044.DATA
//GO.FTO6F001 DD *
//

14. Listing of the SAS Input/Output Retrieval Program

The following is a listing of the SAS^α data retrieval program (File 5 on magnetic tape or NDP044.SAS on floppy diskette) provided by CDIAC to read and print the surface water and atmospheric CO₂ and N₂O data (Files 6-87 on magnetic tape or files *.AIR and *.H2O on floppy diskettes). The JCL statements (preceded by // or /*) shown below are not provided in the file on the tape/diskette; requestors must add JCL statements themselves if required. The statements required will vary for each operating system. The JCL statements shown below are provided to illustrate the statements that an individual using an IBM mainframe (e.g., IBM 3090) at ORNL would need to read these data from a nine-track, 6250 BPI, standard-labeled tape with characters written in EBCDIC.

//UIDCO2 JOB (12345), 'USER ADDRESS'
//OUT OUTPUT DEFAULT=YES, JESDS=ALL, DEST=LOCAL
//STEP1 EXEC SAS, SASRGN=4096K, WORK=1600
//IN DD UNIT=TAPE62, VOL=SER=TAPEVOL,DISP=(,PASS),
// DSN=TAB.NDP044.DATA, LABEL=(4,SL,RETPD=0)
//FT06F001 DD SYSOUT=A
//SYSIN DD *

* A SAS program to rad and print the surface water and
   atmospheric carbon dioxide and nitrous oxide data;
DATA WEISS(DROP=X);
  INFILE IN;
  INPUT X $ 2 @;
  IF X EQ ' ' THEN DO;
    INPUT SAMPTYP $ 1 @4 HEADER $CHAR77.;
    RECCODE=1;
    END;
  ELSE DO;
    INPUT DATEDA 1-2 DATEMO $ 4-6 DATEYR 8-9 TIME 13-16 LAT 20-26
      LATHEM $ 28 LON 32-39 LONHEM $41 PRESS 45-50 H2OTMP 54-58
      XN2O 62-66 XCO2 70-74;
    RECCODE=2;
    END;
DATA PRINT;
  SET WEISS;
  FILE PRINT;
  OPTIONS MISSING=' ';
  IF RECCODE=1 THAN
    PUT SAMPTYP 1 HEADER 4-80;
  ELSE IF RECCODE-2 THEN
    PUT DATEDA 1-2 DATEMO 4-6 DATEYR 8-9 @13 TIME z4. @20 LAT 7.3
    LATHEM 28 @32 LOW 8.3 LONHEM 41 @45 PRESS 6.1 @54 H2OTMP 5.2
      @62 XN2O 5.1 @70 XCO2 5.1 @75 '      ';
RUN;
/*
//
-------------------------------------------------------------------
αSAS is the registered trademark of SAS Institute, Inc., Cary, NC 27511-8000.

15. Verification of Data Transport

The surface water and atmospheric CO₂ and N₂O data can be read by using the FORTRAN or SAS input/output routines provided. Users should verify that the data file had been correctly transported to theri systems by generating some or all of the statistics presented in Table 3. These statistics were generated in FORTRAN but can be duplicated in other languages or statistical packages. If the statistics generated by the user differ from those presented here, the data files may have been corrupted in transport.

These statistics are presented only as a tool to ensure proper reading of the data files. They are not to be construed as summarizing the surface water and atmospheric CO₂ and N₂O data.

The following is a listing of the FORTRAN program used to generate the statistics described in Table 3:

    CHARACTER DATAFIL*12, VARNAME(9)*6
    INTEGER DATEDA, DATEYR, TIME, I, J, N
    REAL LAT, LON, PRESS, H2OTMP, XN2O, XCO2, DATA(9, 5)
    VARNAME(1)='DATEDA'
    VARNAME(2)='DATEYR'
    VARNAME(3)='TIME  '
    VARNAME(4)='LAT   '
    VARNAME(5)='LON   '
    VARNAME(6)='PRESS '
    VARNAME(7)='H2OTMP'
    VARNAME(8)='XN2O  '
    VARNAME(9)='XCO2  '
    DO 10 I=1,9
      DO 5 J=1,5
        DATA(I,J)=0
  5   CONTINUE
 10 CONTINUE
    N=0
    OPEN (UNIT=2, FILE='DATA.LST', ACCESS='SEQUENTIAL',
   1  FORM='FORMATTED', STATUS='OLD')
    OPEN (UNIT=4, FILE='SUMSTATS.OUT', ACCESS='SEQUENTIAL',
   1  FORM='FORMATTED', STATUS='NEW')
 15 READ (2, 100, END=45) DATAFIL
    OPEN (UNIT=3, FILE=DATAFIL, ACCESS='SEQUENTIAL',
   1  FORM='FORMATTED', STATUS='OLD')
    READ (3, 200)
 20 READ (3, 300, END=40) DATEDA, DATEYR, TIME, LAT, LON, PRESS
   1  H2OTMP, XN2O, XCO2
    DATA(1, 1)=REAL(DATEDA)
    DATA(2, 1)=REAL(DATEYR)
    DATA(3, 1)=REAL(TIME)
    DATA(4, 1)=LAT
    DATA(5, 1)=LON
    DATA(6, 1)=PRESS
    DATA(7, 1)=H2OTMP
    DATA(8, 1)=XN2O
    DATA(9, 1)=XCO2

    IF(N.EQ.0) THEN
      DO 30 I=1,9
        DO 25 J=4,5
	  DATA(I, J)=DATA(I,1)
 25	CONTINUE
 30   CONTINUE
    END IF
    DO 35 I=1,9
      DATA(I, 2)=DATA(I, 2)+DATA(I,1)
      IF(DATA(I, 1).LT.DATA(I, 4)) DATA(I, 4)=DATA(I, 1)
      IF(DATA(I, 1).GT.DATA(I, 5)) DATA(I, 5)=DATA(I, 1)
 35 CONTINUE
    N=N+1
    GOTO 20
 40 CLOSE (UNIT=3)
    GOTO 15
 45 CLOSE (UNIT=2)
    DO 50 I=1,9
      DATA(I, 3)=DATA(I, 2)/REAL(N)
 50 CONTINUE
    DO 55 I=1,9
      WRITE (4, 400) VARNAME(I), N, DATA(I, 3), DATA(I, 4),
   1    DATA(I, 5)
 55 CONTINUE
    CLOSE (UNIT=4)
    STOP
100 FORMAT (4X, A12)
200 FORMAT (1X)
300 FORMAT (I2, 5X, I2, 3X, I4, 3X F7.3, 5X, F8.3, 5X, F6.1, 3X, F5.2, 
   1  3X, F5.1, 3X, F5.1)
400 FORMAT (1X, A6, 2X, I6, 2X, F8.3, 2X, F8.3, 2X, F8.3)
    END