Transport and Deposition of Trace Elements to the Greenland Ice Sheet

保存在高纬度冰块中的微量元素记录，如格陵兰冰盖，可能包含有关区域和全球尺度大气和古大气地球化学的重要信息，如火山喷发的时间和规模、人为排放和气候变化。这一记录中的一个关键环节是大气成分和雪化学之间的联系。该项目将通过测量同时存在的气溶胶和雪元素组成，并结合气象空气轨迹分析，对北极高海拔地区活跃的湿沉积过程进行研究，以帮助确定冰盖中污染物的类型、位置和传输路径。来自夏季雪样的痕量金属数据与年累积数据相比较，可以得出一些关于净沉积事件的季节性时间的结论。这些信息将对解释格陵兰冰盖项目(GISP-II)深冰芯中包含的痕量金属记录有重要帮助。

The record of trace elements that is preserved in high latitude ice masses, such as the Greenland ice sheet, potentially contains significant information concerning regional and global scale atmospheric and paleoatmospheric geochemistry, such as the timing and magnitude of volcanic eruptions, anthropogenic emissions, and climatic change. A crucial link in this record is that between atmospheric composition and snow chemistry. This project will conduct studies of wet depositional processes active in the high arctic by measuring concurrent aerosol and snow elemental composition, and combined with meteorological air trajectory analyses to help identify the types, locations, and transport pathways of contaminants in the ice sheet. Trace metal data from summer snow samples, compared to the annual accumulation data, will allow some conclusion on the seasonal timing of net deposition events. This information will be of significant help in interpreting the trace metal record contained in the Greenland Ice Sheet Project (GISP-II) deep ice core.