BOREAS TF-11 Methane and Carbon Dioxide Flux

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                                                                        
C_ADDED                                                                         
N_ADDED                                                                         
START_AIR_TEMP                                                                  
END_AIR_TEMP                                                                    
CH4_FLUX                                                                        
CO2_FLUX                                                                        
WATER_TABLE_HEIGHT                                                              
SITE_COMMENTS                                                                   
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.                                      
C_ADDED                        Estimated amount of carbon contained in the wheat 
                               straw that was added to the plot.              
N_ADDED                        Estimated amount of nitrogen contained in the 
                               urea that was added to the plot.                   
START_AIR_TEMP                 The air temperature within the chamber at the 
                               start of the measurement period.                   
END_AIR_TEMP                   The air temperature within the chamber at the end 
                               of the measurement period.                     
CH4_FLUX                       Methane flux.                                    
CO2_FLUX                       Carbon Dioxide flux.                             
WATER_TABLE_HEIGHT             Height of the water surface above the surface of 
                               the peat.                                       
SITE_COMMENTS                  Descriptive information to clarify or enhance the 
                               site information.                              
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]                                       
C_ADDED                        [grams C][meter^-2]                              
N_ADDED                        [grams C][meter^-2]                              
START_AIR_TEMP                 [Celsius]                                        
END_AIR_TEMP                   [Celsius]                                        
CH4_FLUX                       [micromoles][meter^-2][second^-1]                
CO2_FLUX                       [micromoles][meter^-2][second^-1]                
WATER_TABLE_HEIGHT             [millimeters]                                    
SITE_COMMENTS                  [none]                                           
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 Staff]
SUB_SITE                       [Assigned by BORIS Staff]
DATE_OBS                       [Investigator]
TIME_OBS                       [Investigator]
C_ADDED                        [Investigator]
N_ADDED                        [Investigator]                                
START_AIR_TEMP                 [Thermometer]                                
END_AIR_TEMP                   [Thermometer]                                
CH4_FLUX                       [Gas Chromatograph]                                
CO2_FLUX                       [Gas Chromatograph]                                
WATER_TABLE_HEIGHT             [Investigator]                                
SITE_COMMENTS                  [Investigator]                                
CRTFCN_CODE                    [Assigned by BORIS Staff]                                
REVISION_DATE                  [Assigned by BORIS Staff]                                

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-FEN-FLXTR  SSA-FEN-FLXTR  None    None   None    None 
SUB_SITE             9TF11-FLX02    9TF11-FLX09    None    None   None    None 
DATE_OBS             08-JUN-1994    16-SEP-1994    None    None   None    None 
TIME_OBS             0              2327           None    None   None    None 
C_ADDED              0              300            None    None   None    None 
N_ADDED              0              6              None    None   None    None 
START_AIR_TEMP       2              32             None    None   None    None 
END_AIR_TEMP         4              39             -999    None   None    None 
CH4_FLUX             0              .639           None    None   None    Blank
CO2_FLUX             -19.398        2.144          None    None   None    Blank
WATER_TABLE_HEIGHT   -58            237            None    None   None    None 
SITE_COMMENTS        N/A            N/A            None    None   None    None 
CRTFCN_CODE          CPI            CPI            None    None   None    None 
REVISION_DATE        01-OCT-1998    01-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,C_ADDED,N_ADDED,START_AIR_TEMP,
END_AIR_TEMP,CH4_FLUX,CO2_FLUX,WATER_TABLE_HEIGHT,SITE_COMMENTS,CRTFCN_CODE,
REVISION_DATE
'SSA-FEN-FLXTR','9TF11-FLX02',08-JUN-1994,1610,300,6,23,29,.005,1.082,-11,
'Hummock: North of Tower, along Transect A','CPI',01-OCT-1998
'SSA-FEN-FLXTR','9TF11-FLX02',08-JUN-1994,1613,0,0,23,29,.004,-2.178,-48,
'Hummock: North of Tower, along Transect A','CPI',01-OCT-1998
