BOREAS TE-12 Leaf Gas Exchange 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                                                                        
SPECIES                                                                          
SAMPLE_GROWTH_YEAR                                                              
SAMPLE_ID                                                                       
DOWN_PPFD                                                                       
LEAF_TEMP                                                                       
AIR_TEMP_CHAMBER                                                                
CO2_CONC_CHAMBER                                                                
AIR_FLOW_CHAMBER                                                                
REL_HUM_CHAMBER                                                                 
VAPOR_PRESS_CHAMBER                                                             
BOUND_LAYER_CONDUCT_H20                                                         
LEAF_AREA                                                                       
PHOTOSYNTHETIC_RATE                                                             
STOMATAL_CONDUCT_H20                                                            
INTERCELL_CO2_CONC                                                              
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.                                      
SPECIES                        Botanical (Latin) name of the species (Genus     
                               species).                                           
SAMPLE_GROWTH_YEAR             The year in which the collected sample first      
                               grew.
SAMPLE_ID                      The sample identifier used by data collectors  
                               (see documentation for a detailed description).    
DOWN_PPFD                      The downward photosynthetic photon flux density. 
LEAF_TEMP                      The leaf or shoot temperature                    
AIR_TEMP_CHAMBER               The temperature of the air in the chamber.       
CO2_CONC_CHAMBER               The CO2 concentration in the chamber.            
AIR_FLOW_CHAMBER               The total air flow rate through the system.      
REL_HUM_CHAMBER                The relative humidity of the air in the chamber. 
VAPOR_PRESS_CHAMBER            Vapor pressure of the air in the chamber.        
BOUND_LAYER_CONDUCT_H20        The boundary layer conductance for water vapor of
                               the sample.                                    
LEAF_AREA                      The area of the leaf (or needles) enclosed in the
                               chamber, this value is always half the total   
                               surface area of the sample.                       
PHOTOSYNTHETIC_RATE            Measured Net Photosynthesis                      
STOMATAL_CONDUCT_H20           Stomatal conductance of water vapor.             
INTERCELL_CO2_CONC             Intercellular CO2 concentration                  
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]                                       
SPECIES                        [none]                                           
SAMPLE_GROWTH_YEAR             [unitless]                                       
SAMPLE_ID                      [none]                                           
DOWN_PPFD                      [micromoles][meter^-2][second^-1]                
LEAF_TEMP                      [degrees Celsius]                                
AIR_TEMP_CHAMBER               [degrees Celsius]                                
CO2_CONC_CHAMBER               [parts per million]                              
AIR_FLOW_CHAMBER               [micromoles][second ^-1]                         
REL_HUM_CHAMBER                [percent]                                        
VAPOR_PRESS_CHAMBER            [millibars]                                      
BOUND_LAYER_CONDUCT_H20        [mole H20][meter^-2][second^-1]                  
LEAF_AREA                      [millimeter^2]                                   
PHOTOSYNTHETIC_RATE            [micromoles CO2][meter^-2][second^-1]            
STOMATAL_CONDUCT_H20           [millimoles H2O][meter^-2][second^-1]            
INTERCELL_CO2_CONC             [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                      [BORIS Designation]                                
SUB_SITE                       [BORIS Designation]                                
DATE_OBS                       [Human Observer]                                
TIME_OBS                       [Human Observer]                                
SPECIES                        [Human Observer]                                
SAMPLE_GROWTH_YEAR             [Human Observer]                                
SAMPLE_ID                      [Human Observer]                                
DOWN_PPFD                      [Field Equipment]                                
LEAF_TEMP                      [Thermometer]                                
AIR_TEMP_CHAMBER               [Laboratory Equipment]                                
CO2_CONC_CHAMBER               [Laboratory Equipment]                                
AIR_FLOW_CHAMBER               [Laboratory Equipment]                                
REL_HUM_CHAMBER                [Laboratory Equipment]                                
VAPOR_PRESS_CHAMBER            [Laboratory Equipment]                                
BOUND_LAYER_CONDUCT_H20        [Laboratory Equipment]                                
LEAF_AREA                      [Laboratory Equipment]                                
PHOTOSYNTHETIC_RATE            [Laboratory Equipment]                                
STOMATAL_CONDUCT_H20           [Laboratory Equipment]                                
INTERCELL_CO2_CONC             [Laboratory Equipment]                                
CRTFCN_CODE                    [BORIS Designation]                                
REVISION_DATE                  [BORIS Designation]                                

                                                                                

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-9OA-FLXTR  SSA-YJP-FLXTR  None    None   None    None 
SUB_SITE             9TE12-LGS01    9TE12-LGS01    None    None   None    None 
DATE_OBS             29-MAY-1994    07-AUG-1995    None    None   None    None 
TIME_OBS             515            2010           None    None   None    None 
SPECIES              N/A            N/A            None    None   None    None 
SAMPLE_GROWTH_YEAR   1992           1995           None    None   None    None 
SAMPLE_ID            1              9              None    None   None    None 
DOWN_PPFD            -2.232         3998           None    None   None    None 
LEAF_TEMP            3.846          42.62          None    None   None    None 
AIR_TEMP_CHAMBER     3.8            41.47          None    None   None    Blank
CO2_CONC_CHAMBER     46.32          899.5          None    None   None    None 
AIR_FLOW_CHAMBER     11.09          90.73          None    None   None    None 
REL_HUM_CHAMBER      1.326          60.25          None    None   None    None 
VAPOR_PRESS_CHAMBER  4.417          44.69          None    None   None    None 
BOUND_LAYER_CONDUCT_ 1.4            9.99           None    None   None    None 
H20                 
LEAF_AREA            1.74           39.84          None    None   None    None 
PHOTOSYNTHETIC_RATE  -39.59         31.53          None    None   None    None 
STOMATAL_CONDUCT_H20 -.15           3.46           None    None   None    None 
INTERCELL_CO2_CONC   -3983          7427           None    None   None    None 
CRTFCN_CODE          CPI            CPI            None    None   None    None 
REVISION_DATE        24-NOV-1997    24-NOV-1997    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,SPECIES,SAMPLE_GROWTH_YEAR,SAMPLE_ID,
DOWN_PPFD,LEAF_TEMP,AIR_TEMP_CHAMBER,CO2_CONC_CHAMBER,AIR_FLOW_CHAMBER,
REL_HUM_CHAMBER,VAPOR_PRESS_CHAMBER,BOUND_LAYER_CONDUCT_H20,LEAF_AREA,
PHOTOSYNTHETIC_RATE,STOMATAL_CONDUCT_H20,INTERCELL_CO2_CONC,CRTFCN_CODE,
REVISION_DATE
'SSA-9OA-FLXTR','9TE12-LGS01',06-JUN-1994,1228,'Old_Aspen','1994','1',1962.0,
27.05,25.61,328.4,45.66,17.84,15.0,1.965,17.81,6.88,.11,216.7,'CPI',24-NOV-1997
'SSA-9OA-FLXTR','9TE12-LGS01',06-JUN-1994,1234,'Old_Aspen','1994','2',1110.0,
25.77,24.65,357.3,41.77,18.05,12.96,1.965,14.0,10.89,.14,218.4,'CPI',24-NOV-1997
