The Environmental Measurements Laboratory's Stratospheric Radionuclide (RANDAB) and Trace Gas (TRACDAB) Databases

RANDAB represents the worlds largest collection of stratospheric and upper tropospheric radionuclide data. The database contains results of measurements made from 1957 to 1983 during the ASHCAN, STARDUST, AIRSTREAM, and High Altitude Sampling Program (HASP) projects. More than 20,000 filters were collected during this period and analyzed for approximately 40 different radionuclides. All of the available data characterizing each filter are included in RANDAB. RANDAB offers gas samples characterizing the tritium, radon and 14CO2 concentration in stratospheric air. Only a limited amount of data is available for radon because of analytical and sampling problems. The tritium data were provided graciously by Dr. Allen Mason of Los Alamos Laboratory and Dr. H. G. Oslund of the Tritium Laboratory, University of Miami. The second database, TRACDAB, contains more than 1000 stratospheric trace gas measurements for the period 1974 to 1983. These samples were collected during Project AIRSTREAM. During the years 1974 to 1976, the samples were analyzed at EML. Subsequently, Washington State University (1976-1979) and the Oregon Graduate Institute for Science & Technology (formerly the Oregon Graduate Center 1980-1983) were under contract to EML to analyze AIRSTREAM gas samples. During the period 1974-1983, 980 gas samples were analyzed for one or more of the following gases CCl3F, CCl2F2, CCl4, CH3CCl3, SF6, N20, CO2, CH4, and carbonyl sulfide (COS). To learn more about the naming of halocarbons (CFCs, HFCs, HCFCs, and halons), go to http://cdiac.ess-dive.lbl.gov/pns/cfcinfo.html. For access to the data files, click this link to the CDIAC data transition website: http://cdiac.ess-dive.lbl.gov/ndps/db1019.html

RANDAB数据集是全球规模最大的平流层与对流层上层放射性核素数据库。该数据库收录了1957年至1983年间，在ASHCAN、STARDUST、AIRSTREAM以及高空采样计划（High Altitude Sampling Program, HASP）中开展的测量结果。此期间共收集超过20000份滤膜样品，并针对约40种不同的放射性核素完成分析。RANDAB纳入了表征每份滤膜的全部可用数据。此外，RANDAB还提供了表征平流层空气中氚、氡以及¹⁴CO₂浓度的气体样品数据。受分析与采样条件限制，氡的可用数据量较为有限。氚相关数据由洛斯阿拉莫斯实验室的艾伦·梅森博士与迈阿密大学氚实验室的H·G·奥斯隆德博士慷慨提供。
第二个数据库TRACDAB收录了1974年至1983年间的1000余份平流层痕量气体测量数据，这些样品采集自AIRSTREAM计划。1974年至1976年，样品由EML实验室完成分析；后续，华盛顿州立大学（1976-1979年）与俄勒冈科学与技术研究生院（原俄勒冈研究生中心，1980-1983年）受EML委托，对AIRSTREAM计划的气体样品开展分析。1974年至1983年间，共计980份气体样品被针对以下一种或多种气体开展检测：三氯氟甲烷（CCl₃F）、二氯二氟甲烷（CCl₂F₂）、四氯化碳（CCl₄）、三氯乙烷（CH₃CCl₃）、六氟化硫（SF₆）、一氧化二氮（N₂O）、二氧化碳（CO₂）、甲烷（CH₄）以及羰基硫（COS）。
若需了解卤代烃（氟氯烃CFCs、氢氟烃HFCs、氢氯氟烃HCFCs以及哈龙）的命名规则，可访问链接：http://cdiac.ess-dive.lbl.gov/pns/cfcinfo.html。如需获取数据文件，请点击此链接跳转至CDIAC数据迁移网站：http://cdiac.ess-dive.lbl.gov/ndps/db1019.html。