BOREAS TGB-06 Soil Methane Oxidation and Production from NSA BP and Fen Sites

7.3  Data Characteristics

7.3.1 Parameter/Variable

The parameters contained in the data files on the CD-ROM are:

         Column Name
------------------------------
SITE_NAME
SUB_SITE
DATE_OBS
SAMPLE_TYPE
SAMPLE_LOCN
MEASUREMENT_DURATION
SOIL_DEPTH
CH4_CONC
ISOTOPE_13C
ISOTOPE_H
CRTFCN_CODE
REVISION_DATE

7.3.2 Variable Description/Definition

The descriptions of the parameters contained in the data files on the CD-ROM 
are:

         Column Name                             Description
------------------------------ ------------------------------------------------
SITE_NAME                      The identifier assigned to the site by BOREAS, in 
                               the format SSS-TTT-CCCCC, where SSS identifies
                               the portion of the study area: NSA, SSA, REG, 
                               TRN, and TTT identifies the cover type for the 
                               site, 999 if unknown, and CCCCC is the identifier
                               for site, exactly what it means will vary with 
                               site type.
SUB_SITE                       The identifier assigned to the sub-site by 
                               BOREAS, in the format GGGGG-IIIII, where GGGGG is 
                               the group associated with the sub-site 
                               instrument, e.g. HYD06 or STAFF, and IIIII is the 
                               identifier for sub-site, often this will refer to 
                               an instrument.
DATE_OBS                       The date on which the data were collected.
SAMPLE_TYPE                    Type of medium for the sample.
SAMPLE_LOCN                    Specific location where the sample was measured.
MEASUREMENT_DURATION           Length of time for the measurement.
SOIL_DEPTH                     The depth below the soil surface at which the 
                               measurement was taken.
CH4_CONC                       CH4 concentration.
ISOTOPE_13C                    Carbon 13/12 isotope ratio.
ISOTOPE_H                      Hydrogen D/H isotope value of methane.
CRTFCN_CODE                    The BOREAS certification level of the data.  
                               Examples are CPI (Checked by PI), CGR (Certified 
                               by Group), PRE (Preliminary), and CPI-??? (CPI 
                               but questionable).
REVISION_DATE                  The most recent date when the information in the
                               referenced data base table record was revised.

7.3.3 Unit of Measurement

The measurement units for the parameters contained in the data files on the CD-
ROM are:

         Column Name                                Units
------------------------------ ------------------------------------------------
SITE_NAME                      [none]
SUB_SITE                       [none]
DATE_OBS                       [DD-MON-YY]
SAMPLE_TYPE                    [none]
SAMPLE_LOCN                    [none]
MEASUREMENT_DURATION           [minutes]
SOIL_DEPTH                     [millimeters]
CH4_CONC                       [parts per million]
ISOTOPE_13C                    [permil]
ISOTOPE_H                      [permil]
CRTFCN_CODE                    [none]
REVISION_DATE                  [DD-MON-YY]

7.3.4 Data Source

The source of the parameter values contained in the data files on the CD-ROM 
are:

         Column Name                             Data Source
------------------------------ ------------------------------------------------
SITE_NAME                      Investigator
SUB_SITE                       Investigator
DATE_OBS                       Investigator
SAMPLE_TYPE                    Investigator
SAMPLE_LOCN                    Investigator
MEASUREMENT_DURATION           Investigator
SOIL_DEPTH                     Investigator
CH4_CONC                       gas chromatograph
ISOTOPE_13C                    VG Prism II
ISOTOPE_H                      VG Prism II
CRTFCN_CODE                    Assigned by BORIS
REVISION_DATE                  Assigned by BORIS

7.3.5 Data Range

The following table gives information about the parameter values found in the 
data files on the CD-ROM.

                     Minimum        Maximum        Missng  Unrel  Below   Data
                     Data           Data           Data    Data   Detect  Not
Column Name          Value          Value          Value   Value  Limit   Cllctd
--------------------------------------------------------------------------------
SITE_NAME            NSA-999-T06GR  SSA-YJP-FLXTR  None    None   None    None
SUB_SITE             TGB06-CON01    TGB06-CON01    None    None   None    None
DATE_OBS             24-AUG-93      11-SEP-96      None    None   None    None
SAMPLE_TYPE          N/A            N/A            None    None   None    None
SAMPLE_LOCN          N/A            N/A            None    None   None    None
MEASUREMENT_DURATION 0              960            None    None   None    None
SOIL_DEPTH           0              10000          None    None   None    None
CH4_CONC             -197.98        3.3            None    None   None    None
ISOTOPE_13C          -68.3          -30.8          -999    None   None    None
ISOTOPE_H            -384           -224           -999    None   None    Blank
CRTFCN_CODE          CPI            CPI            None    None   None    None
REVISION_DATE        12-JUN-97      12-JUN-97      None    None   None    None
--------------------------------------------------------------------------------
Minimum Data Value -- The minimum value found in the column.
Maximum Data Value -- The maximum value found in the column.
Missng Data Value  -- The value that indicates missing data. This is used to
                      indicate that an attempt was made to determine the
                      parameter value, but the attempt was unsuccessful.
Unrel Data Value   -- The value that indicates unreliable data.  This is used
                      to indicate an attempt was made to determine the
                      parameter value, but the value was deemed to be
                      unreliable by the analysis personnel.
Below Detect Limit -- The value that indicates parameter values below the
                      instruments detection limits.  This is used to
                      indicate that an attempt was made to determine the
                      parameter value, but the analysis personnel determined
                      that the parameter value was below the detection
                      limit of the instrumentation.
Data Not Cllctd    -- This value indicates that no attempt was made to
                      determine the parameter value.  This usually
                      indicates that BORIS combined several similar but
                      not identical data sets into the same data base table
                      measure that parameter.

Blank -- Indicates that blank spaces are used to denote that type of value.
N/A   -- Indicates that the value is not applicable to the respective column.
None  -- Indicates that no values of that sort were found in the column.


7.4 Sample Data Record

SITE_NAME,SUB_SITE,DATE_OBS,SAMPLE_TYPE,SAMPLE_LOCN,MEASUREMENT_DURATION,
SOIL_DEPTH,CH4_CONC,ISOTOPE_13C,ISOTOPE_H,CRTFCN_CODE,REVISION_DATE
'NSA-999-T06GR','TGB06-CON01',25-AUG-1993,'prodded_bubbles','GBP_z43',1,
3000.0,2.15,-50.7,-355.0,'CPI',12-JUN-1997
'NSA-999-T06GR','TGB06-CON01',25-AUG-1993,'prodded_bubbles','GBP_b6',1,
3000.0,2.064,-47.7,-372.0,'CPI',12-JUN-1997
