SUMMARY "SUM_DATA_PRODUCT" "CO2_HIST " "SUM_DATA_SET" "GRNHS-GASES " "SUM_DATATYPE" "CO2-HISTORY " "ARCHIVE_NAME" "NCDS " "ARCHIVE_STATUS" "Available " "DS_DESCRIPTION" "Concentrations of atmospheric greenhouse effect gases " "DT_DESCRIPTION" "Atmospheric concentrations of carbon dioxide from ice cores" "SUM_BEGIN_DATE" " " "SUM_END_DATE" " " "SUM_PROCESS_LEVEL" "3" "SPATIAL1" "Single station at Vostok " "SPATIAL2" " " "SPATIAL3" "Point data " "SPATIAL4" " " "TEMPORAL1" "Mean age of air ranging from 1700 years BP to " "TEMPORAL2" "159,690 years BP. " "TEMPORAL3" " " "TEMPORAL4" " " "PRODUCT1" "Available through NCDS in Common Data Format (CDF). " "PRODUCT2" "One ASCII file on MS-DOS floppy disk. " "PRODUCT3" "Available on GEDEX CD-ROM. " "PRODUCT4" " " EOF PARAMETERS "CO2" "Carbon Dioxide Concentration" "ppmv" EOF SOURCES "FIELD-OBS" "IN SITU" EOF