U.S.-France Collaborative Research: Air-Snow Transfer Function in Greenland

该奖项将支持美国和 法国科学家关于空气-雪转移的主题 在格陵兰岛的功能。 参与者是：Jean博士- Luc Jaffrezo，Cliff Davidson和Jack Dibb，卡内基梅隆大学 Michel Legrand博士，冰川学专家 et Geophysique de l'Environment，St. Martin d'Here，France. 美国（GISP II）和欧洲（GRIP）的深钻项目 包括采集两个深芯到基岩， 在未来两年格陵兰岛的首脑会议地区。 的 岩芯将提供大约20万年的详细记录， 产生了关于地球地质历史，气候 化学成分的变化和变异 大气成分 的一个重要组成部分 GISP II和GRIP项目是一个大气层项目， 科学，旨在帮助将冰芯数据 与之前的大气条件相适应 有三 该计划的目标：1）源区和大气 化学成分到达峰会的途径 2）将这些物种纳入 将对峰会期间的降水进行调查，以便 确定沉积过程中的机制和速率 雪暴;以及3）化学成分的变化 将对毒品进行量化。 这些目标将 实现了一个多组件的计划，包括领域 工作，实验室分析和计算机建模。这个奖项 将支持美国和法国研究人员之间的合作 为了进行实验室工作，数据 与上述有关的口译和联合出版物 项目 这一努力将受益于 美国和法国团队在地球化学方面的专业知识， 气体和气溶胶，自然和人为的示踪剂 排放以及运输和沉积机制。 的 这项研究的结果有望大大提高 科学界检索信息的能力 从深冰。

This award will support collaborative research between US and French scientists on the topic of the air-snow transfer function in Greenland. The participants are: Drs. Jean- Luc Jaffrezo, Cliff Davidson and Jack Dibb, Carnegie Mellon University, and Dr. Michel Legrand, Laboratoire de Glaciologie et Geophysique de l'Environment, St. Martin d'Here, France. The US (GISP II) and European (GRIP) deep drilling projects involve acquisition of two deep cores to bedrock from the Summit region of Greenland over the next two years. The cores will provide a detailed record of about 200,000 years, yielding information on the earth's geologic history, climate change and variations in the chemical composition of atmospheric constituents. One important component of the GISP II and GRIP projects is a program in atmospheric sciences, which is designed to help relate the ice core data to atmospheric conditions in previous times. There are three objectives to this program: 1) Source regions and atmospheric pathways for the chemical constituents reaching the Summit will be identified; 2) Incorporation of these species into precipitation at the Summit will be investigated, in order to determine the mechanisms and rates of deposition during snowstorms; and 3) Changes in the chemical composition of the icesheet will be quantified. These objectives will be achieved by a multicomponent program that incorporates field work, laboratory analyses, and computer modelling. This award will support collaboration between US and French researchers for the purpose of carrying out laboratory work, data interpretation and joint publications related to the above projects. This effort will benefit from the complementary expertise of the US and French teams in the geochemistry of gases and aerosols, of tracers of natural and anthropogenic emissions and of transport and deposition mechanisms. The results of this research are expected to improve greatly the ability of the scientific community to retrieve information from deep ice.