Size-segregated compositional analysis of aerosol particles collected in the European Arctic during the ACCACIA campaign
Size-segregated compositional analysis of aerosol particles collected in the European Arctic during the ACCACIA campaign
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DOI：
10.5194/acp-16-4063-2016
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发表时间：
2016-03
影响因子：
6.3
通讯作者：
G. Young;Hazel M. Jones;E. Darbyshire;K. Baustian;J. McQuaid;K. Bower;P. Connolly;M. Gallagher;T. Choularton
中科院分区：
文献类型：
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作者：
G. Young;Hazel M. Jones;E. Darbyshire;K. Baustian;J. McQuaid;K. Bower;P. Connolly;M. Gallagher;T. Choularton
抽象的。介绍了在春季北极气溶胶-云耦合和气候相互作用活动（ACCACIA）期间（2013年3月至4月）的六次飞行中，机载大气测量设施（FAAM）BAe-146飞机上收集的过滤器样本的单颗粒成分分析。扫描电子显微镜被用来获得尺寸隔离的颗粒组成和尺寸分布，这些进行了比较，从机翼安装的光学颗粒计数器的相应数据。合理的协议之间的计算数尺寸distributions. Significant变化的组成观察，不同的外部和内部混合确定，空气质量的轨迹的情况下，基于混合单粒子拉格朗日积分轨迹（HYSPLIT）分析。主要颗粒类别是硅酸盐粉尘和海盐，在一种情况下检测到的颗粒特别富含钾和钙。来源地区从北冰洋和格陵兰岛到俄罗斯北方和欧洲大陆各不相同。后向轨迹之间的良好一致性反映了样品之间的可比组成趋势。在所有情况下，硅酸盐粉尘被确定，粉尘的元素组成是一致的所有样品，除了一个。据推测，长距离，高海拔运输是主要负责这种灰尘，可能的来源包括亚洲干旱地区。
Abstract. Single-particle compositional analysis of filter samples collected on board the Facility for Airborne Atmospheric Measurements (FAAM) BAe-146 aircraft is presented for six flights during the springtime Aerosol–Cloud Coupling and Climate Interactions in the Arctic (ACCACIA) campaign (March–April 2013). Scanning electron microscopy was utilised to derive size-segregated particle compositions and size distributions, and these were compared to corresponding data from wing-mounted optical particle counters. Reasonable agreement between the calculated number size distributions was found. Significant variability in composition was observed, with differing external and internal mixing identified, between air mass trajectory cases based on HYbrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) analyses. Dominant particle classes were silicate-based dusts and sea salts, with particles notably rich in K and Ca detected in one case. Source regions varied from the Arctic Ocean and Greenland through to northern Russia and the European continent. Good agreement between the back trajectories was mirrored by comparable compositional trends between samples. Silicate dusts were identified in all cases, and the elemental composition of the dust was consistent for all samples except one. It is hypothesised that long-range, high-altitude transport was primarily responsible for this dust, with likely sources including the Asian arid regions.