BOREAS TGB-10 Volatile Organic Carbon Data over the SSA 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 ISOPRENE_CONC ALPHA-PINENE_CONC BETA-PINENE_CONC CAMPHENE_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. ISOPRENE_CONC The ambient concentration of isoprene ALPHA-PINENE_CONC The ambient concentration of alpha-pinene. BETA-PINENE_CONC The ambient concentration of beta-pinene. CAMPHENE_CONC The ambient concentration of camphene. 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] ISOPRENE_CONC [parts per billion Carbon] ALPHA-PINENE_CONC [parts per billion Carbon] BETA-PINENE_CONC [parts per billion Carbon] CAMPHENE_CONC [parts per billion Carbon] 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 Not applicable SUB_SITE Not applicable DATE_OBS Investigator TIME_OBS Investigator] ISOPRENE_CONC Gas Chromatograph ALPHA-PINENE_CONC Gas Chromatograph BETA-PINENE_CONC Gas Chromatograph CAMPHENE_CONC Gas Chromatograph CRTFCN_CODE Not applicable REVISION_DATE Not applicable 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-OJP-FLXTR None None None None SUB_SITE TGB10-HCR01 TGB10-HCR01 None None None None DATE_OBS 31-MAY-1994 09-SEP-1994 None None None None TIME_OBS 0 2340 None None None None ISOPRENE_CONC .13 36.23 None None None None ALPHA-PINENE_CONC .049 5.86 None None None Blank BETA-PINENE_CONC .072 3.65 None None None Blank CAMPHENE_CONC .055 2.88 None None None Blank CRTFCN_CODE CPI CPI None None None None REVISION_DATE 06-OCT-1995 06-OCT-1995 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,ISOPRENE_CONC,ALPHA-PINENE_CONC, BETA-PINENE_CONC,CAMPHENE_CONC,CRTFCN_CODE,REVISION_DATE 'SSA-9OA-FLXTR','TGB10-HCR01',11-JUN-1994,1500,4.41,,,,'CPI',06-OCT-1995 'SSA-9OA-FLXTR','TGB10-HCR01',11-JUN-1994,1700,5.46,,,,'CPI',06-OCT-1995