BOREAS TGB-10 Volatile Organic Carbon Data over the SSA

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
TIME_OBS
ISOPRENE_CONC
ALPHA-PINENE_CONC
BETA-PINENE_CONC
CAMPHENE_CONC
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.
TIME_OBS                     The Greenwich Mean Time (GMT) when the data were
                             collected.
ISOPRENE_CONC                The ambient concentration of isoprene
ALPHA-PINENE_CONC            The ambient concentration of alpha-pinene.
BETA-PINENE_CONC             The ambient concentration of beta-pinene.
CAMPHENE_CONC                The ambient concentration of camphene.
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-YYYY]
TIME_OBS                       [HHMM GMT]
ISOPRENE_CONC                  [parts per billion Carbon]
ALPHA-PINENE_CONC              [parts per billion Carbon]
BETA-PINENE_CONC               [parts per billion Carbon]
CAMPHENE_CONC                  [parts per billion Carbon]
CRTFCN_CODE                    [none]
REVISION_DATE                  [DD-MON-YYYY]


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                      Not applicable
SUB_SITE                       Not applicable 
DATE_OBS                       Investigator
TIME_OBS                       Investigator]
ISOPRENE_CONC                  Gas Chromatograph
ALPHA-PINENE_CONC              Gas Chromatograph
BETA-PINENE_CONC               Gas Chromatograph 
CAMPHENE_CONC                  Gas Chromatograph
CRTFCN_CODE                    Not applicable
REVISION_DATE                  Not applicable

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            SSA-9OA-FLXTR  SSA-OJP-FLXTR  None    None   None    None
SUB_SITE             TGB10-HCR01    TGB10-HCR01    None    None   None    None
DATE_OBS             31-MAY-1994    09-SEP-1994    None    None   None    None
TIME_OBS             0              2340           None    None   None    None
ISOPRENE_CONC        .13            36.23          None    None   None    None
ALPHA-PINENE_CONC    .049           5.86           None    None   None    Blank
BETA-PINENE_CONC     .072           3.65           None    None   None    Blank
CAMPHENE_CONC        .055           2.88           None    None   None    Blank
CRTFCN_CODE          CPI            CPI            None    None   None    None
REVISION_DATE        06-OCT-1995    06-OCT-1995    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
                      but this particular science team did not
                      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,TIME_OBS,ISOPRENE_CONC,ALPHA-PINENE_CONC,
BETA-PINENE_CONC,CAMPHENE_CONC,CRTFCN_CODE,REVISION_DATE
'SSA-9OA-FLXTR','TGB10-HCR01',11-JUN-1994,1500,4.41,,,,'CPI',06-OCT-1995
'SSA-9OA-FLXTR','TGB10-HCR01',11-JUN-1994,1700,5.46,,,,'CPI',06-OCT-1995
