BOREAS TF-11 SSA-Fen Tower Flux and Meteorological Data

7.3 Data Characteristics

7.3.1 Parameter/Variable

The parameters contained in the data files are:

         Column Name
------------------------------
SITE_NAME
SUB_SITE
DATE_OBS
TIME_OBS
SENSIBLE_HEAT_FLUX_ABV_CNPY
CALC_SENSIBLE_HEAT_FLUX
LATENT_HEAT_FLUX_ABV_CNPY
CALC_LATENT_HEAT_FLUX
NET_RAD_ABV_CNPY
CO2_FLUX_ABV_CNPY
CALC_CO2_FLUX
DOWN_PPFD_ABV_CNPY
WIND_DIR_ABV_CNPY
WIND_SPEED_ABV_CNPY
AIR_TEMP_ABV_CNPY
SOIL_TEMP_10CM
SOIL_TEMP_20CM
RAINFALL
DOWN_SOLAR_RAD_ABV_CNPY
UP_SOLAR_RAD_ABV_CNPY
ABS_HUM_ABV_CNPY
VAPOR_PRESS_DEFICIT_ABV_CNPY
SURF_PRESS
WATER_TABLE_HGT
CH4_FLUX_ABV_CNPY
CRTFCN_CODE
REVISION_DATE

7.3.2 Variable Description/Definition

The descriptions of the parameters contained in the data files 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.
SENSIBLE_HEAT_FLUX_ABV_CNPY    The sensible heat flux measured above the canopy.
CALC_SENSIBLE_HEAT_FLUX        The sensible heat flux measured above the canopy.
                               Data on calm nights have been adjusted. Gaps in
                               the eddy flux measurements have been filled in
                               using regression equations of eddy flux against
                               meteorological variables.
LATENT_HEAT_FLUX_ABV_CNPY      The latent heat flux measured above the canopy.
CALC_LATENT_HEAT_FLUX          The latent heat flux measured above the canopy.
                               Data on calm nights has been adjusted. Gaps in 
                               the eddy flux measurements have been filled in 
                               using regression equations of eddy flux against 
                               meteorological variables.
NET_RAD_ABV_CNPY               The net radiation measured above the canopy.
CO2_FLUX_ABV_CNPY              The carbon dioxide flux measured above the 
                               canopy.
CALC_CO2_FLUX                  The carbon dioxide flux measured above the 
                               canopy.
                               Data on calm nights have been adjusted. Gaps in
                               the eddy flux measurements have been filled in
                               using regression equations of eddy flux against
                               meteorological variables.
DOWN_PPFD_ABV_CNPY             The downward (incoming) photosynthetic photon 
                               flux density measured above the canopy.
WIND_DIR_ABV_CNPY              The direction from which the wind is blowing 
                               (increasing in a clockwise direction from the
                               North) and measured above the canopy.
WIND_SPEED_ABV_CNPY            The wind speed measured above the canopy.
AIR_TEMP_ABV_CNPY              The air temperature measured above the canopy.
SOIL_TEMP_10CM                 Soil temperature at 10 cm depth.
SOIL_TEMP_20CM                 Soil temperature at 20 cm depth.
RAINFALL                       The amount of rainfall measured above the canopy
                               in the 30 minute period following the time of 
                               observation.
DOWN_SOLAR_RAD_ABV_CNPY        The downward (incoming) solar radiation measured
                               above the canopy.
UP_SOLAR_RAD_ABV_CNPY          The reflected (outgoing) solar radiation measured
                               above the canopy.
ABS_HUM_ABV_CNPY               The absolute humidity measured above the canopy.
VAPOR_PRESS_DEFICIT_ABV_CNPY   The vapor pressure deficit measured above the 
                               canopy.
SURF_PRESS                     The atmospheric pressure measured at the station.
WATER_TABLE_HGT                Water table height above a reference surface.
CH4_FLUX_ABV_CNPY              The methane flux measured above the canopy.
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 are:

         Column Name                                Units
------------------------------ ------------------------------------------------
SITE_NAME                      [none]
SUB_SITE                       [none]
DATE_OBS                       [DD-MON-YYYY]
TIME_OBS                       [HHMM GMT]
SENSIBLE_HEAT_FLUX_ABV_CNPY    [Watts][meter^-2]
CALC_SENSIBLE_HEAT_FLUX        [Watts][meter^-2]
LATENT_HEAT_FLUX_ABV_CNPY      [Watts][meter^-2]
CALC_LATENT_HEAT_FLUX          [Watts][meter^-2]
NET_RAD_ABV_CNPY               [Watts][meter^-2]
CO2_FLUX_ABV_CNPY              [micromoles][meter^-2][second^-1]
CALC_CO2_FLUX                  [micromoles][meter^-2][second^-1]
DOWN_PPFD_ABV_CNPY             [micromoles][meter^-2][second^-1]
WIND_DIR_ABV_CNPY              [degrees]
WIND_SPEED_ABV_CNPY            [meters][second^-1]
AIR_TEMP_ABV_CNPY              [degrees Celsius]
SOIL_TEMP_10CM                 [degrees Celsius]
SOIL_TEMP_20CM                 [degrees Celsius]
RAINFALL                       [millimeters]
DOWN_SOLAR_RAD_ABV_CNPY        [Watts][meter^-2]
UP_SOLAR_RAD_ABV_CNPY          [Watts][meter^-2]
ABS_HUM_ABV_CNPY               [grams][meter^-3]
VAPOR_PRESS_DEFICIT_ABV_CNPY   [kiloPascals]
SURF_PRESS                     [kiloPascals]
WATER_TABLE_HGT                [millimeters]
CH4_FLUX_ABV_CNPY              [micromoles][meter^-2][second^-1]
CRTFCN_CODE                    [none]
REVISION_DATE                  [DD-MON-YYYY]

7.3.4 Data Source

The source of the parameter values contained in the data files 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.]
SENSIBLE_HEAT_FLUX_ABV_CNPY    [fine wire thermocouple]
CALC_SENSIBLE_HEAT_FLUX        [Supplied by Investigator.]
LATENT_HEAT_FLUX_ABV_CNPY      [Krypton hygrometer]
CALC_LATENT_HEAT_FLUX          [Supplied by Investigator.]
NET_RAD_ABV_CNPY               [rigid dome net radiation sensor]
CO2_FLUX_ABV_CNPY              [differential infrared spectrometer]
CALC_CO2_FLUX                  [Supplied by Investigator.]
DOWN_PPFD_ABV_CNPY             [quantum sensor]
WIND_DIR_ABV_CNPY              [wind vane]
WIND_SPEED_ABV_CNPY            [cup anemometer]
AIR_TEMP_ABV_CNPY              [platinum resistance temperature device]
SOIL_TEMP_10CM                 [thermistor]
SOIL_TEMP_20CM                 [thermistor]
RAINFALL                       [tipping bucket rain gauge]
DOWN_SOLAR_RAD_ABV_CNPY        [pyranometer]
UP_SOLAR_RAD_ABV_CNPY          [pyranometer]
ABS_HUM_ABV_CNPY               [humidity sensor]
VAPOR_PRESS_DEFICIT_ABV_CNPY   [humidity sensor]
SURF_PRESS                     [aneroid barometer]
WATER_TABLE_HGT                [float/pulley system]
CH4_FLUX_ABV_CNPY              [closed path tunable diode laser spectrometer]
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.

                     Minimum        Maximum        Missng  Unrel  Below   Data
                     Data           Data           Data    Data   Detect  Not
Column Name          Value          Value          Value   Value  Limit   Cllctd
--------------------------------------------------------------------------------
SITE_NAME            SSA-FEN-FLXTR  SSA-FEN-FLXTR  None    None   None    None
SUB_SITE             9TF11-FLX01    9TF11-FLX01    None    None   None    None
DATE_OBS             19-MAY-1994    09-OCT-1995    None    None   None    None
TIME_OBS             0              2330           None    None   None    None
SENSIBLE_HEAT_FLUX_  -93            281            -999    None   None    None
ABV_CNPY
CALC_SENSIBLE_HEAT_  -93            281            -999    None   None    None
FLUX
LATENT_HEAT_FLUX_ABV_-32            442            -999    None   None    None
CNPY
CALC_LATENT_HEAT_    -61            442            -999    None   None    None
FLUX
NET_RAD_ABV_CNPY     -84            696            -999    None   None    None
CO2_FLUX_ABV_CNPY    -15.9          7.7            -999    None   None    None
CALC_CO2_FLUX        -19.1          7.7            -999    None   None    None
DOWN_PPFD_ABV_CNPY   -3             1953           -999    None   None    None
WIND_DIR_ABV_CNPY    0              360            -999    None   None    None
WIND_SPEED_ABV_CNPY  0              7.22           -999    None   None    None
AIR_TEMP_ABV_CNPY    -5.6           32.6           -999    None   None    None
SOIL_TEMP_10CM       3.3            24.26          -999    None   None    None
SOIL_TEMP_20CM       -1.55          20.03          -999    None   None    None
RAINFALL             0              9.91           -999    None   None    None
DOWN_SOLAR_RAD_ABV_  -10            895            -999    None   None    None
CNPY
UP_SOLAR_RAD_ABV_    -4             179            -999    None   None    None
CNPY
ABS_HUM_ABV_CNPY     2.14           22.31          -999    None   None    None
VAPOR_PRESS_DEFICIT_ 0              42.4           -999    None   None    None
ABV_CNPY
SURF_PRESS           92.63          97.84          -999    None   None    None
WATER_TABLE_HGT      50             303            -999    None   None    None
CH4_FLUX_ABV_CNPY    -.02465        .53177         -999    None   None    None
CRTFCN_CODE          CPI            CPI            None    None   None    None
REVISION_DATE        09-OCT-1998    09-OCT-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,SENSIBLE_HEAT_FLUX_ABV_CNPY,
CALC_SENSIBLE_HEAT_FLUX,LATENT_HEAT_FLUX_ABV_CNPY,CALC_LATENT_HEAT_FLUX,
NET_RAD_ABV_CNPY,CO2_FLUX_ABV_CNPY,CALC_CO2_FLUX,DOWN_PPFD_ABV_CNPY,
WIND_DIR_ABV_CNPY,WIND_SPEED_ABV_CNPY,AIR_TEMP_ABV_CNPY,SOIL_TEMP_10CM,
SOIL_TEMP_20CM,RAINFALL,DOWN_SOLAR_RAD_ABV_CNPY,UP_SOLAR_RAD_ABV_CNPY,
ABS_HUM_ABV_CNPY,VAPOR_PRESS_DEFICIT_ABV_CNPY,SURF_PRESS,WATER_TABLE_HGT,
CH4_FLUX_ABV_CNPY,CRTFCN_CODE,REVISION_DATE
'SSA-FEN-FLXTR','9TF11-FLX01',19-MAY-1994,600,-999.0,-18.0,-999.0,3.0,-38.0,
-999.0,1.3,0.0,-999.0,3.54,5.28,5.6,3.51,0.0,-1.0,2.0,7.34,.13,96.3,91.0,
-999.0,'CPI',09-OCT-1998
'SSA-FEN-FLXTR','9TF11-FLX01',19-MAY-1994,630,-999.0,-20.0,-999.0,6.0,-12.0,
-999.0,1.3,0.0,-999.0,3.33,5.31,5.51,3.51,0.0,0.0,2.0,7.22,.14,96.32,91.0,
-999.0,'CPI',09-OCT-1998
