Analysis of the Long Term Record of Arctic Airborne Particle Composition

这是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新研究。这项技术非常灵敏和强大，能够测定大约40种元素的浓度，包括许多对环境至关重要的元素，如铝、锌、砷和锑，这些元素的浓度都很低。首先，本研究将完成加拿大大气环境服务局自1980年以来在埃尔斯米尔岛获得的过滤样本的分析，其次将分析冬季/春季过渡期间在mold Bay和Igloolik获得的样本。北极雾霾是对流层下层气溶胶浓度的总称，它的发生在冬末达到季节性最大值，此时它在北极广泛分布。这种变化既是北移的季节差异的结果，也是干湿沉降去除过程的结果。多变量因素分析、潜在源贡献函数和时间序列分析，结合气团轨迹，将提供平流模式，这将使我们对从源区域到加拿大北极的运输机制和大气路径的理解更加完善。并允许对北极气溶胶微量成分的相对组成趋势进行调查。

This is a renewed 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. As a first priority, this study will complete the analysis of filtered samples obtained by the Atmospheric Environment Services of Canada on Ellesmere Island since 1980, and secondarily will analyze samples obtained at Mould Bay and Igloolik during the winter/spring transition. 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.