BOREAS TF-09 SSA-OBS Branch Level Flux Data

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
CHAMBER_NUM
CO2_FLUX_CHAMBER
H2O_FLUX_CHAMBER
DOWN_PPFD_CHAMBER
AIR_TEMP_CHAMBER
LEAF_TEMP_CHAMBER
AIR_HUM_DEFICIT_CHAMBER
REL_HUM_CHAMBER
CO2_CONC_CHAMBER
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) of the start of the 
                               data collection.
CHAMBER_NUM                    Identification number of chamber.
CO2_FLUX_CHAMBER               The chamber CO2 flux.
H2O_FLUX_CHAMBER               The water vapor flux measured in the chamber.
DOWN_PPFD_CHAMBER              The incoming photosynthetic photon flux density
                               measured in the chamber.
AIR_TEMP_CHAMBER               The temperature of the air in the chamber.
LEAF_TEMP_CHAMBER              The temperature of leaves in the chamber.
AIR_HUM_DEFICIT_CHAMBER        The air humidity deficit measured in the chamber
REL_HUM_CHAMBER                The relative humidity of the air in the chamber.
CO2_CONC_CHAMBER               The CO2 concentration in the chamber.
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]
CHAMBER_NUM                    [unitless]
CO2_FLUX_CHAMBER               [micromoles][meter^-2][second^-1]
H2O_FLUX_CHAMBER               [millimoles][meters^-2][second^-1]
DOWN_PPFD_CHAMBER              [micromoles][meters^-2][second^-1]
AIR_TEMP_CHAMBER               [degrees Celsius]
LEAF_TEMP_CHAMBER              [degrees Celsius]
AIR_HUM_DEFICIT_CHAMBER        [parts per thousand]
REL_HUM_CHAMBER                [percent]
CO2_CONC_CHAMBER               [parts per million]
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                      [Assigned by BORIS.]
SUB_SITE                       [Assigned by BORIS.]
DATE_OBS                       [Supplied by Investigator.]
TIME_OBS                       [Supplied by Investigator.]
CHAMBER_NUM                    [Supplied by Investigator.]
CO2_FLUX_CHAMBER               [LI-COR LI-6262 IRGA]
H2O_FLUX_CHAMBER               [LI-COR LI-6262 IRGA]
DOWN_PPFD_CHAMBER              [Macam SD101QV light sensor]
AIR_TEMP_CHAMBER               [Vaisala temperature and humidity probes]
LEAF_TEMP_CHAMBER              [Cu-Con thermocouple]
AIR_HUM_DEFICIT_CHAMBER        [Vaisala temperature and humidity probes]
REL_HUM_CHAMBER                [Vaisala temperature and humidity probes]
CO2_CONC_CHAMBER               [LI-COR LI-6262 IRGA]
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            SSA-OBS-FLXTR  SSA-OBS-FLXTR  None    None   None    None
SUB_SITE             9TF09-FLX02    9TF09-FLX02    None    None   None    None
DATE_OBS             07-APR-1996    23-NOV-1996    None    None   None    None
TIME_OBS             0              2355           None    None   None    None
CHAMBER_NUM          1              4              None    None   None    None
CO2_FLUX_CHAMBER     -5.95          1.57           None    None   None    None
H2O_FLUX_CHAMBER     -.16           2              None    None   None    None
DOWN_PPFD_CHAMBER    0              1838           None    None   None    Blank
AIR_TEMP_CHAMBER     -33.8          47.8           None    None   None    None
LEAF_TEMP_CHAMBER    -34.5          48.7           None    None   None    None
AIR_HUM_DEFICIT_     -1.33          77.41          None    None   None    Blank
CHAMBER
REL_HUM_CHAMBER      0              111.5          None    None   None    None
CO2_CONC_CHAMBER     133            661            None    None   None    None
CRTFCN_CODE          CPI            CPI            None    None   None    None
REVISION_DATE        02-SEP-1998    02-SEP-1998    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,CHAMBER_NUM,CO2_FLUX_CHAMBER,
H2O_FLUX_CHAMBER,DOWN_PPFD_CHAMBER,AIR_TEMP_CHAMBER,LEAF_TEMP_CHAMBER,
AIR_HUM_DEFICIT_CHAMBER,REL_HUM_CHAMBER,CO2_CONC_CHAMBER,CRTFCN_CODE,
REVISION_DATE
'SSA-OBS-FLXTR','9TF09-FLX02',07-APR-1996,100,1,-.11,0.0,151.0,2.0,2.2,3.09,
58.74,377.0,'CPI',02-SEP-1998
'SSA-OBS-FLXTR','9TF09-FLX02',07-APR-1996,105,2,.02,.001,91.0,1.44,.74,2.9,
59.73,377.0,'CPI',02-SEP-1998
