Analysis of the Record of Arctic Airborne Particle Compositions

9423252这是一项利用仪器中子活化分析（INAA）技术对北极气溶胶中痕量成分的继续研究。 该技术非常灵敏和强大，能够确定大约40种元素的浓度，包括许多环境关键元素，如铝，锌，砷和锑，这些元素的浓度非常低。 这项研究将完成对加拿大大气环境服务局1980年至1991年在埃尔斯米尔岛获得的过滤样本、1992年在极地日出实验期间获得的样本以及从阿拉斯加、加拿大北方和芬兰北方获得的其他样本的分析。 北极烟霾是对流层低层气溶胶浓度的总称，在冬末达到季节性最大值，当时它在北极地区广泛传播。 这种变化是向北输送的季节性差异以及通过干湿沉降的迁移过程的结果。 多变量因子分析，潜在的源贡献函数，时间序列分析，结合空气质量轨迹将提供平流模式，这将完善我们的运输机制和大气路径的理解，从源区到加拿大北极，并允许在北极气溶胶微量成分的相对组成的趋势的调查。 ***

9423252 This is a continued investigation of the trace constituents in arctic aerosols, using the Instrumental Neutron Activation Analysis (INAA) technique. The technique is extremely sensitive and powerful, capable of determining the concentration of about forty elements, including many environmentally crucial ones such as aluminum, zinc, arsenic and antimony that are present in very low concentrations. This study will complete the analysis of filtered samples obtained by the Atmospheric Environment Services of Canada on Ellesmere Island from 1980 to 1991, of samples obtained in 1992 during the Polar Sunrise Experiment, and additional samples to be obtained from Alaska, northern Canada, and northern Finland. The occurrence of arctic haze, the general term for aerosol concentrations in the lower troposphere, reaches a seasonal maximum in late winter when it becomes widespread through the arctic. The variation is the result both of seasonal differences in the northward transport, and in the removal process through wet and dry deposition. Multivariate factor analysis, potential source contribution functions, and time series analyses, combined with air mass trajectories will provide advective patterns that will refine our understanding of the transport mechanism and atmospheric pathways from the source regions to the Canadian Arctic, and allow the investigations of trends in the relative composition of the arctic aerosol trace constituents. ***