Analysis of the Long Term Record of Arctic Airborne Particle Composition

北极空气颗粒成分的长期记录分析

• 批准号: 9122944
• 负责人: Philip Hopke
• 金额: $ 28.32万
• 依托单位: Clarkson University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-05-01 至 1996-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9122944&HistoricalAwards=false
• 关键词: Analysis; Long; Term; Record; Arctic

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.

这是利用仪器中子活化分析(INAA)技术对北极气溶胶中痕量组分的重新研究。这项技术极其灵敏和强大，能够测定大约40种元素的浓度，其中包括许多对环境至关重要的元素，如铝、锌、砷和锑，它们的浓度很低。作为第一个优先事项，这项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品的分析，其次将分析冬春季过渡期间在莫尔德湾和伊格卢利克获得的样品。北极雾霾是对流层下部气溶胶浓度的总称，当它在整个北极蔓延时，在冬末达到季节性最大值。这种变化既是北上输送季节差异的结果，也是干湿沉降清除过程的结果。多变量因子分析、潜在源贡献函数和时间序列分析，与空气质量轨迹相结合，将提供平流模式，使我们更好地理解从源区到加拿大北极的输送机制和大气路径，并能够调查北极气溶胶痕量组分的相对组成的趋势。