Chemical Constituents in Air and Snow at Summit, Greenland: Interpretation of the GISP-2 Ice Core

9321642 Davidson该项目是对化学微量元素和物种从源区通过大气层到格陵兰冰盖的运输进行调查的继续。 其目标是提供信息，解释通过格陵兰冰盖计划（GISP-2）钻探工作获得的长冰芯中的微量元素分布。 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）确定化学成分到达钻井现场的源区和大气路径，包括在运输过程中气团特征的可能变化，（2）研究湿和干沉积机制以及化学物质进入降水的速率，（3）深冰芯资料解释方法的发展。 之前的实地工作已经收集了空气，气溶胶，降水和沉积的雪样品，将分析各种阴离子和阳离子，微量元素，碳化合物和微量气体。 本项目将着重于沉积机制。 ***

9321642 Davidson 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 development of methods of interpreting the deep ice core data. Prior field work has resulted in 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. This project will emphasize the deposition mechanisms. ***