U.S.-France Cooperative Research: Reconstructing Atmospheric Lead Sources of and Fluxes to Urban Coastal Areas

9981488科克伦美国-与法国在环境地球化学方面进行合作的有斯托尼布鲁克的纽约州立大学的J. Kirk Cochran和法国马赛的欧洲地球科学研究和教育中心的Alain贝隆。 调查人员将确定输入率的历史和沿海地区稳定铅的来源。 来自美国东北部盐沼和意大利的存档样本将进行铅同位素分析，以确定其来源。 美国研究人员以前的研究已经建立了每个站点的积累和铅通量的年表。 这些样本将通过从位于法国南部罗纳河三角洲的盐沼中收集两个岩心来补充。 将在CEREGE分析这些研究中心的时间顺序和稳定的铅浓度。 美国调查员为这一合作带来了地质年代学和使用天然放射性核素作为示踪剂方面的专门知识。 这将得到法国在铅同位素方面的专门知识的补充。 该项目将促进对沿海大气污染源的了解。该奖项代表了美国方面向NSF和法国国家科学研究中心（CNRS）提出的联合提案。 NSF将为美国调查员提供旅费和生活费，以收集样本，进行铅分析，并在法国举办短期课程。 CNRS将支持法国研究人员访问美国。

9981488CochranThis three-year award for U.S.-France collaboration in environmental geochemistry involves J. Kirk Cochran of the State University of New York at Stony Brook and Alain Veron of the Centre Europeen de Recherche et d'Enseignement de Geosciences (CEREGE) in Marseilles, France. The investigators will determine the history of input rates and sources of stable lead to coastal areas. Archived samples from salt marshes in the northeastern United States, and from Italy will be analyzed for isotopes of lead to determine their sources. Previous research by the U.S. investigator has established chronologies of accumulation and lead flux for each site. These samples will be complemented by the collection of two cores from salt marshes located in the Rhone Delta in Southern France. Chronologies and stable lead concentrations from these sites will be analyzed at CEREGE. The U.S. investigator brings to this collaboration expertise in geochronology and use of natural radionuclides as tracers. This will be complemented by French expertise in lead isotopes. The project will advance understanding of sources of coastal atmospheric pollution. This award represents the U.S. side of a joint proposal to the NSF and the French National Center for Scientific Research (CNRS). NSF will cover travel funds and living expenses for the U.S. investigator to collect samples, work on the analyses of lead, and present a short course in France. The CNRS will support the visits of the French researchers to the United States.