BOREAS TF-07 SSA-OBS 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
LATENT_HEAT_FLUX_ABV_CNPY
CO2_FLUX_ABV_CNPY
CO2_CONC_ABV_CNPY
MEAN_WIND_SPEED_ABV_CNPY
SDEV_WIND_SPEED_ABV_CNPY
MEAN_WIND_DIR_ABV_CNPY
SDEV_WIND_DIR_ABV_CNPY
FRICTION_VEL_ABV_CNPY
MEAN_AIR_TEMP_ABV_CNPY
SDEV_AIR_TEMP_ABV_CNPY
DOWN_SOLAR_RAD_ABV_CNPY
MEAN_VAPOR_PRESS_ABV_CNPY
SDEV_VAPOR_PRESS_ABV_CNPY
MEAN_SPECIFIC_HUM_ABV_CNPY
SDEV_SPECIFIC_HUM_ABV_CNPY
TF07_MOMENTUM_FLUX_ABV_CNPY
MEAN_U_WIND_SPEED
MEAN_V_WIND_SPEED
SDEV_U_WIND_SPEED
SDEV_V_WIND_SPEED
SDEV_W_WIND_SPEED
H2O_FLUX_ABV_CNPY
CH4_FLUX_ABV_CNPY
CH4_CONC_ABV_CNPY
N2O_FLUX_ABV_CNPY
N2O_CONC_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.
LATENT_HEAT_FLUX_ABV_CNPY      The latent heat flux measured above the canopy.
CO2_FLUX_ABV_CNPY              The carbon dioxide flux measured above the canopy.
CO2_CONC_ABV_CNPY              The carbon dioxide concentration measured above
                               the canopy.
MEAN_WIND_SPEED_ABV_CNPY       The mean wind speed measured above the canopy 
                               over a 30 minute period.
SDEV_WIND_SPEED_ABV_CNPY       The standard deviation of the wind speed 
                               measured above the canopy over a 30 minute period.
MEAN_WIND_DIR_ABV_CNPY         The mean wind direction measured above the canopy
                               over a 30 minute period.
SDEV_WIND_DIR_ABV_CNPY         The standard deviation of the wind direction 
                               measured above the canopy over a 30 minute period.
FRICTION_VEL_ABV_CNPY          The friction velocity above the canopy.
MEAN_AIR_TEMP_ABV_CNPY         The mean air temperature measured above the canopy
                               over a 30 minute period.
SDEV_AIR_TEMP_ABV_CNPY         The standard deviation of the air temperature 
                               measured above the canopy over a 30 minute period.
DOWN_SOLAR_RAD_ABV_CNPY        The downward (incoming) solar radiation measured
                               above the canopy.
MEAN_VAPOR_PRESS_ABV_CNPY      The mean vapor pressure measured above the canopy
                               over a 30 minute period.
SDEV_VAPOR_PRESS_ABV_CNPY      The standard deviation of the vapor pressure 
                               measured above the canopy over a 30 minute period.
MEAN_SPECIFIC_HUM_ABV_CNPY     The 30 minute mean specific humidity measured 
                               above the canopy.
SDEV_SPECIFIC_HUM_ABV_CNPY     The 30 minute standard deviation of specific 
                               humidity measured above the canopy.
TF07_MOMENTUM_FLUX_ABV_CNPY    The momentum flux measured above the canopy.
MEAN_U_WIND_SPEED              Mean of a 30 minute period of the streamwise wind
                               speed.
MEAN_V_WIND_SPEED              Mean of a 30 minute period of the lateral wind 
                               speed, perpendicular to the U wind vector.
SDEV_U_WIND_SPEED              Standard deviation of the streamwise wind speed.
SDEV_V_WIND_SPEED              Standard deviation of the lateral wind speed.
SDEV_W_WIND_SPEED              Standard deviation of the vertical wind speed.
H2O_FLUX_ABV_CNPY              The water vapor flux measured above the canopy.
CH4_FLUX_ABV_CNPY              The methane flux measured above the canopy.
CH4_CONC_ABV_CNPY              The methane concentration measured above the 
                               canopy.
N2O_FLUX_ABV_CNPY              The nitrous oxide flux measured above the canopy.
N2O_CONC_ABV_CNPY              The nitrous oxide concentration 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]
LATENT_HEAT_FLUX_ABV_CNPY      [Watts][meter^-2]
CO2_FLUX_ABV_CNPY              [micromoles][meter^-2][second^-1]
CO2_CONC_ABV_CNPY              [parts per million]
MEAN_WIND_SPEED_ABV_CNPY       [meters][second^-1]
SDEV_WIND_SPEED_ABV_CNPY       [meters][second^-1]
MEAN_WIND_DIR_ABV_CNPY         [degrees from north]
SDEV_WIND_DIR_ABV_CNPY         [degrees from north]
FRICTION_VEL_ABV_CNPY          [meters][seconds^-1]
MEAN_AIR_TEMP_ABV_CNPY         [degrees Celsius]
SDEV_AIR_TEMP_ABV_CNPY         [degrees Celsius]
DOWN_SOLAR_RAD_ABV_CNPY        [Watts][meter^-2]
MEAN_VAPOR_PRESS_ABV_CNPY      [kiloPascals]
SDEV_VAPOR_PRESS_ABV_CNPY      [kiloPascals]
MEAN_SPECIFIC_HUM_ABV_CNPY     [grams][kilogram^-1]
SDEV_SPECIFIC_HUM_ABV_CNPY     [grams][kilogram^-1]
TF07_MOMENTUM_FLUX_ABV_CNPY    [newton][meter^-2]
MEAN_U_WIND_SPEED              [meters][second^-1]
MEAN_V_WIND_SPEED              [meters][second^-1]
SDEV_U_WIND_SPEED              [meters][second^-1]
SDEV_V_WIND_SPEED              [meters][second^-1]
SDEV_W_WIND_SPEED              [meters][second^-1]
H2O_FLUX_ABV_CNPY              [millimoles][meter^-2][second^-1]
CH4_FLUX_ABV_CNPY              [micromoles][meter^-2][second^-1]
CH4_CONC_ABV_CNPY              [parts per million]
N2O_FLUX_ABV_CNPY              [nanomoles][meter^-2][second^-1]
N2O_CONC_ABV_CNPY              [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 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    [sonic anemometer]
LATENT_HEAT_FLUX_ABV_CNPY      [Infrared Gas Analyzer]
CO2_FLUX_ABV_CNPY              [Infrared Gas Analyzer]
CO2_CONC_ABV_CNPY              [Infrared Gas Analyzer]
MEAN_WIND_SPEED_ABV_CNPY       [sonic anemometer]
SDEV_WIND_SPEED_ABV_CNPY       [sonic anemometer]
MEAN_WIND_DIR_ABV_CNPY         [sonic anemometer]
SDEV_WIND_DIR_ABV_CNPY         [sonic anemometer]
FRICTION_VEL_ABV_CNPY          [sonic anemometer]
MEAN_AIR_TEMP_ABV_CNPY         [thermocouple]
SDEV_AIR_TEMP_ABV_CNPY         [thermocouple]
DOWN_SOLAR_RAD_ABV_CNPY        [Pyranometer]
MEAN_VAPOR_PRESS_ABV_CNPY      [psychrometer]
SDEV_VAPOR_PRESS_ABV_CNPY      [psychrometer]
MEAN_SPECIFIC_HUM_ABV_CNPY     [psychrometer]
SDEV_SPECIFIC_HUM_ABV_CNPY     [psychrometer]
TF07_MOMENTUM_FLUX_ABV_CNPY    [sonic anemometer]
MEAN_U_WIND_SPEED              [sonic anemometer]
MEAN_V_WIND_SPEED              [sonic anemometer]
SDEV_U_WIND_SPEED              [sonic anemometer]
SDEV_V_WIND_SPEED              [sonic anemometer]
SDEV_W_WIND_SPEED              [sonic anemometer]
H2O_FLUX_ABV_CNPY              [Infrared Gas Analyzer]
CH4_FLUX_ABV_CNPY              [tunable-diode laser]
CH4_CONC_ABV_CNPY              [tunable-diode laser]
N2O_FLUX_ABV_CNPY              [tunable-diode laser]
N2O_CONC_ABV_CNPY              [tunable-diode laser]
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-OBS-FLXTR  SSA-OBS-FLXTR  None    None   None    None
SUB_SITE             9TF07-FLX01    9TF07-FLX01    None    None   None    None
DATE_OBS             24-MAY-1994    18-SEP-1994    None    None   None    None
TIME_OBS             0              2355           None    None   None    None
SENSIBLE_HEAT_FLUX_  -120.1         554.9          -999    None   None    None
ABV_CNPY
LATENT_HEAT_FLUX_ABV -53.1          323.62         -999    None   None    None
_CNPY
CO2_FLUX_ABV_CNPY    -14.069        15.444         -999    None   None    None
CO2_CONC_ABV_CNPY    341.07         411.08         -999    None   None    None
MEAN_WIND_SPEED_ABV_ .056           7.853          -999    None   None    None
CNPY
SDEV_WIND_SPEED_ABV_ .081           2.485          -999    None   None    None
CNPY
MEAN_WIND_DIR_ABV_   0              370.8          -999    None   None    None
CNPY
SDEV_WIND_DIR_ABV_   .05            181.154        -999    None   None    None
CNPY
FRICTION_VEL_ABV_    0              1.155          -999    None   None    None
CNPY
MEAN_AIR_TEMP_ABV_   3.85           26.59          -999    None   None    None
CNPY
SDEV_AIR_TEMP_ABV_   .05            1.51           -999    None   None    None
CNPY
DOWN_SOLAR_RAD_ABV_  -66.36         852.52         -999    None   None    None
CNPY
MEAN_VAPOR_PRESS_ABV .501           1.882          -999    None   None    None
_CNPY
SDEV_VAPOR_PRESS_ABV .001           .114           -999    None   None    None
_CNPY
MEAN_SPECIFIC_HUM_   3.217          12.407         -999    None   None    None
ABV_CNPY
SDEV_SPECIFIC_HUM_   .006           .746           -999    None   None    None
ABV_CNPY
TF07_MOMENTUM_FLUX_  -1.531         .073           -999    None   None    None
ABV_CNPY
MEAN_U_WIND_SPEED    -6.248         6.388          -999    None   None    None
MEAN_V_WIND_SPEED    -4.339         4.855          -999    None   None    None
SDEV_U_WIND_SPEED    .063           3.628          -999    None   None    None
SDEV_V_WIND_SPEED    .083           2.525          -999    None   None    None
SDEV_W_WIND_SPEED    .009           1.574          -999    None   None    None
H2O_FLUX_ABV_CNPY    -1.192         7.348          -999    None   None    None
CH4_FLUX_ABV_CNPY    -22724         99192          -999    None   None    None
CH4_CONC_ABV_CNPY    0              3.34           -999    None   None    None
N2O_FLUX_ABV_CNPY    -5.047         2.386          -999    None   None    None
N2O_CONC_ABV_CNPY    .258           .322           -999    None   None    None
CRTFCN_CODE          CPI            CPI            None    None   None    None
REVISION_DATE        23-MAR-1999    23-MAR-1999    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,
LATENT_HEAT_FLUX_ABV_CNPY,CO2_FLUX_ABV_CNPY,CO2_CONC_ABV_CNPY,
MEAN_WIND_SPEED_ABV_CNPY,SDEV_WIND_SPEED_ABV_CNPY,MEAN_WIND_DIR_ABV_CNPY,
SDEV_WIND_DIR_ABV_CNPY,FRICTION_VEL_ABV_CNPY,MEAN_AIR_TEMP_ABV_CNPY,
SDEV_AIR_TEMP_ABV_CNPY,DOWN_SOLAR_RAD_ABV_CNPY,MEAN_VAPOR_PRESS_ABV_CNPY,
SDEV_VAPOR_PRESS_ABV_CNPY,MEAN_SPECIFIC_HUM_ABV_CNPY,
SDEV_SPECIFIC_HUM_ABV_CNPY,TF07_MOMENTUM_FLUX_ABV_CNPY,MEAN_U_WIND_SPEED,
MEAN_V_WIND_SPEED,SDEV_U_WIND_SPEED,SDEV_V_WIND_SPEED,SDEV_W_WIND_SPEED,
H2O_FLUX_ABV_CNPY,CH4_FLUX_ABV_CNPY,CH4_CONC_ABV_CNPY,N2O_FLUX_ABV_CNPY,
N2O_CONC_ABV_CNPY,CRTFCN_CODE,REVISION_DATE
'SSA-OBS-FLXTR','9TF07-FLX01',24-MAY-1994,1735,285.7,126.87,-12.376,361.57,
3.313,1.018,21.0,23.096,.503,12.64,.65,-999.0,1.243,.018,8.077,.118,-.295,
3.069,.529,1.055,1.219,.79,2.853,-999.0,-999.0,-999.0,-999.0,'CPI',23-MAR-1999
'SSA-OBS-FLXTR','9TF07-FLX01',24-MAY-1994,1800,256.5,106.81,-10.573,363.1,
4.052,1.184,17.2,20.918,.594,12.19,.56,-999.0,1.245,.015,8.089,.094,-.412,
3.836,.458,1.165,1.358,.921,2.4,-999.0,-999.0,-999.0,-999.0,'CPI',23-MAR-1999
