ospheric Transport and Deposition of Chemical stituents at the GISP II Ice Core Site

该项目是对化学微量元素和物质从源区通过大气到格陵兰冰盖的运输进行调查。它的目标是为通过格陵兰冰盖计划（GISP-II）钻探工作获得的长冰芯中微量元素分布的解释提供信息。冰芯有望提供跨越20万年的详细记录。该项目有三个具体目标：(1)确定化学成分到达钻探地点的来源区域和大气路径，包括在运输过程中气团特征可能发生的变化；(2)研究化学物质进入降雪的机制和速率；(3)研究沉积后积雪化学变化和积雪内物种的再分布。野外工作包括收集空气、气溶胶、降水和积雪样品，分析各种阴离子和阳离子、微量元素、碳化合物和微量气体。一个特殊的大气营地，以确保样品将不受污染的钻探，已计划作为GISP-II计划的一部分。

This project is 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 to be obtained through the Greenland Ice Sheet Program (GISP-II) 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 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, has been planned as part of the GISP-II program.