title: Long-term variations in the surface air 7Be concentration and climatic changes.
abstract: We have used EML Surface Air Sampling Program (SASP) data to analyze the long-term trend in (7)Be surface concentration and address possible correlation between this long-term trend and climatic changes, namely changes in precipitation patterns and temperature. In this paper we present (7)Be concentration data from 23 sites, spanning over 25 years, all over the world, and extract long-term trend parameter using two independent techniques. The (7)Be concentrations in most stations show a pronounced decreasing trend, potentially corresponding to statistically significant changes in transporting (7)Be from upper atmosphere source to these sites. Weak negative correlation between (7)Be concentration and amount of precipitation was also observed. However, more data from more representative sites around the world are needed the statistical robustness of this trend.
authors.affiliation: Idaho State University, Idaho Accelerator Center, 1500 Alvin Ricken Dr., Pocatello, ID 83201, USA.
authors.forename: Liu
authors.initials: L
authors.lastname: Jiwen
authors.forename: Valeriia N
authors.initials: VN
authors.lastname: Starovoitova
authors.forename: Douglas P
authors.initials: DP
authors.lastname: Wells
mesh_terms: D000396:Air Pollutants, Radioactive / Q000032:analysis*; D001608:Beryllium / Q000032:analysis*; D002980:Climate; D011834:Radiation Monitoring; D011868:Radioisotopes / Q000032:analysis*; D013997:Time Factors
chemical_list: D000396:Air Pollutants, Radioactive; D011868:Radioisotopes; D001608:Beryllium