Atmospheric Transport and Deposition of Chemical Constituent at Summit, Greenland

格陵兰峰会化学成分的大气传输和沉积

• 批准号: 9123082
• 负责人: Jean-Luc Jaffrezo
• 金额: $ 34.65万
• 依托单位: Carnegie-Mellon University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-04-15 至 1994-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9123082&HistoricalAwards=false
• 关键词: Atmospheric; Transport; Deposition; Chemical; Constituent

This project is the continuation of an investigation of the transport of chemical trace elements and species from source regions through the atmosphere to the Greenland ice sheet. Its goal is to provide information for the interpretation of the trace element distribution in a long ice core being obtained through the Greenland Ice Sheet Program (GISP-2) drilling effort. The ice core is expected to provide a detailed record spanning 200,000 years. The project has three specific objectives: (1) the identification of source regions and atmospheric pathways for the chemical constituents reaching the drill site, including the possible changes in air mass characteristics during transit, (2) the study of the wet and dry deposition mechanisms and rates of incorporation of chemical species into precipitating snow, and (3) the investigation of post-depositional changes in snow chemistry and of the redistribution of species within the snowpack. Field work consists of the collecting of air, aerosol, precipitation, and deposited snow samples, which will be analyzed for various anions and cations, trace elements, carbon compounds, and trace gases. A special atmospheric camp, to ensure that samples will be uncontaminated by the drilling, is being maintained as part of the GISP-2 program.

该项目是对化学痕量元素和物种从来源区域通过大气向格陵兰冰盖输送的调查的继续。其目标是为解释通过格陵兰冰盖计划钻探工作获得的长冰芯中的微量元素分布提供信息。冰芯预计将提供跨越20万年的详细记录。该项目有三个具体目标：(1)确定到达钻探地点的化学成分的来源区域和大气路径，包括在运输过程中气团特征的可能变化；(2)研究化学物质在降水中的湿法和干法沉积机制和并入速率，(3)研究积雪化学的沉积后变化和积雪中物种的重新分布。野外工作包括收集空气、气溶胶、降水和沉积的雪样，分析各种阴离子和阳离子、微量元素、碳化合物和痕量气体。作为GISP-2计划的一部分，正在维护一个特殊的大气营地，以确保样本不会受到钻探的污染。