BOREAS TF-03 Automated Chamber CO2 Flux data from the NSA-OBS

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                                                                        
CHAMBER_NUM                                                                     
CO2_FLUX                                                                        
CALIBRATION                                                                     
MOSS_TEMP                                                                       
AIR_TEMP                                                                        
DOWN_PPFD_CHAMBER                                                               
REVISION_DATE                                                                   
CRTFCN_CODE                                                                     

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) when the data were 
                               collected.                                      
CHAMBER_NUM                    Identifier assigned to the chamber measured.     
CO2_FLUX                       Carbon Dioxide flux.                             
CALIBRATION                    Binary code to indicate whether the system is 
                               calibrating.  If a 1 is present then the system 
                               is calibrating.                                    
MOSS_TEMP                      Temperature of the moss within the chamber.      
AIR_TEMP                       The air temperature.                             
DOWN_PPFD_CHAMBER              The incoming photosynthetic photon flux density  
                               measured in the chamber.                         
REVISION_DATE                  The most recent date when the information in the 
                               referenced data base table record was revised.  
CRTFCN_CODE                    The BOREAS certification level of the data.  Exa 
                               Examples are CPI (Checked by PI), CGR (Certified 
                               by Group), PRE (Preliminary), and CPI-??? (CPI 
                               but questionable).                                  

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]                                       
CHAMBER_NUM                    [unitless]                                       
CO2_FLUX                       [micromoles][meter^-2][second^-1]                
CALIBRATION                    [none]                                           
MOSS_TEMP                      [degrees Celsius]                                
AIR_TEMP                       [degrees Celsius]                                
DOWN_PPFD_CHAMBER              [micromoles][meters^-2][second^-1]               
REVISION_DATE                  [DD-MON-YYYY]                                      
CRTFCN_CODE                    [none]                                           

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 Staff]                                
SUB_SITE                       [Assigned by BORIS Staff]                                
DATE_OBS                       [Investigator]                                
TIME_OBS                       [Investigator]                                
CHAMBER_NUM                    [Investigator]                                
CO2_FLUX                       [IRGA]                                
CALIBRATION                    [Investigator]                                
MOSS_TEMP                      [type-T thermocouples]                                
AIR_TEMP                       [type-T thermocouples]                                
DOWN_PPFD_CHAMBER              [Investigator]                                
REVISION_DATE                  [Assigned by BORIS Staff]                                
CRTFCN_CODE                    [Assigned by BORIS Staff]                                

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            NSA-OBS-FLXTR  NSA-OBS-FLXTR  None    None   None    None 
SUB_SITE             9TF03-FLX10    9TF03-FLXC9    None    None   None    None 
DATE_OBS             23-SEP-1995    21-OCT-1996    None    None   None    None 
TIME_OBS             14             2356           None    None   None    None 
CHAMBER_NUM          1              10             None    None   None    None 
CO2_FLUX             -26.18502      206.2905       -999    None   None    None 
CALIBRATION          0              1              None    None   None    None 
MOSS_TEMP            -11.10693      51.89928       -999    None   None    None 
AIR_TEMP             -12.46         46.67          -999    None   None    None 
DOWN_PPFD_CHAMBER    -.72           1853.657       -999    None   None    None 
REVISION_DATE        09-OCT-1998    09-OCT-1998    None    None   None    None 
CRTFCN_CODE          CPI            CPI            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,CALIBRATION,MOSS_TEMP,
AIR_TEMP,DOWN_PPFD_CHAMBER,REVISION_DATE,CRTFCN_CODE
'NSA-OBS-FLXTR','9TF03-FLX10',23-SEP-1995,2356,10,5.16147,1,6.55583,8.14,
-.72,09-OCT-1998,' CPI'
'NSA-OBS-FLXTR','9TF03-FLX10',24-SEP-1995,256,10,1.009062,0,6.74634,7.98,
-.72,09-OCT-1998,' CPI'
