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

9981488科克伦这项为期三年的美法环境地球化学合作奖的获得者是纽约州立大学石溪分校的j·柯克·科克伦和法国马赛欧洲地球科学研究与工程中心（cerge）的阿兰·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。来自美国东北部和意大利盐沼的存档样本将被分析铅的同位素，以确定其来源。美国研究人员先前的研究已经确定了每个地点的累积和铅通量的年表。这些样本将由位于法国南部罗纳河三角洲的盐沼收集的两个岩心来补充。这些地点的年表和稳定的铅浓度将在cerge进行分析。美国研究人员为这次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业知识。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美国国家科学基金会和法国国家科学研究中心（CNRS）提交的联合提案。美国国家科学基金会将为美国研究人员提供旅费和生活费，帮助他们收集样本，进行铅的分析，并在法国进行短期课程。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.