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首页> 外文期刊>Atmospheric chemistry and physics >Size-segregated compositional analysis of aerosol particles collected in the European Arctic during the ACCACIA campaign
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Size-segregated compositional analysis of aerosol particles collected in the European Arctic during the ACCACIA campaign

机译：ACACIA战役期间在欧洲北极地区收集的气溶胶颗粒的尺寸分离组成分析

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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.
机译：在春季气溶胶-云耦合和北极气候相互作用（ACCACIA）战役（3月至4月）中，进行了六次飞行的机载大气测量设施（FAAM）BAe-146飞机上收集的过滤器样品的单颗粒成分分析？2013）。利用扫描电子显微镜得出尺寸分离的颗粒组成和尺寸分布，并将其与来自机翼式光学颗粒计数器的相应数据进行比较。在计算的数字大小分布之间找到了合理的一致性。基于混合单颗粒拉格朗日综合轨迹（HYSPLIT）分析，在空气质量轨迹情况之间，观察到了成分的显着变化，并确定了不同的内部和内部混合。占主导地位的颗粒类别是硅酸盐基粉尘和海盐，在一种情况下，发现的颗粒明显富含K和Ca。来源地区从北冰洋和格陵兰到俄罗斯北部和欧洲大陆不等。样品之间可比的成分趋势反映了后轨迹之间的良好一致性。在所有情况下都鉴定出硅酸盐粉尘，除一个样品外，所有样品的粉尘元素组成均相同。据推测，这种尘埃是造成远距离高空运输的主要原因，其来源可能包括亚洲干旱地区。

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