Characterization of a Newly Developed Aircraft-Based Laser Ablation Aerosol Mass Spectrometer (ALABAMA) and First Field Deployment in Urban Pollution Plumes over Paris During MEGAPOLI 2009
Characterization of a Newly Developed Aircraft-Based Laser Ablation Aerosol Mass Spectrometer (ALABAMA) and First Field Deployment in Urban Pollution Plumes over Paris During MEGAPOLI 2009
复制标题
新开发的机载激光烧蚀气溶胶质谱仪 (ALABAMA) 的表征以及 MEGAPOLI 2009 期间在巴黎上空城市污染羽流中的首次现场部署
DOI：
10.1080/02786826.2010.517813
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发表时间：
2011
影响因子：
5.2
通讯作者：
S. Borrmann
中科院分区：
文献类型：
--
作者：
M. Brands;Michael Kamphus;Thomas Böttger;J. Schneider;F. Drewnick;Anja Roth;J. Curtius;C. Voigt;A. Borbon;Matthias Beekmann;A. Bourdon;T. Perrin;S. Borrmann
在这里，我们提出了一种新的基于飞机的激光烧蚀气溶胶质谱仪（亚拉巴马），这是能够测量的化学成分和单个环境气溶胶颗粒的大小在150和900 nm之间的尺寸范围内的发展和第一个现场部署。该仪器使用连续波532 nm激光来测量和检测颗粒，脉冲266 nm激光来消融和消除颗粒，以及双极Z形飞行时间质谱仪来检测正离子和负离子。亚拉巴马可装入150 cm高的19”飞机机架中，总重量为140 kg，因此是目前同类型仪器中最小、重量最轻的仪器之一。我们提出了一个详细的亚拉巴马粒子束宽度，检测和烧蚀效率方面的表征，并举例说明不同类型的粒子的质谱。2009年7月，在MEGAPOLI夏季活动期间，在法国巴黎附近的一架ATR 42飞机上执行了第一次机载实地使命。在11次研究飞行中，对应于大约44小时的总测量时间，亚拉巴马测量了6502个单粒子质谱。使用每种颗粒类型的独特标记物将质谱分为8个颗粒类别。最丰富的颗粒类型包含有机和二次无机化合物。结果进一步表明，当比较来自大巴黎地区的空气质量与来自其他方向的空气质量时，不同空气质量之间观测到的颗粒类型丰度的差异非常明显。
We present here the development and first field deployment of a novel Aircraft-based Laser ABlation Aerosol MAss spectrometer (ALABAMA), which is capable of measuring the chemical composition and size of individual ambient aerosol particles in the size range between 150 and 900 nm. The instrument uses a continuous wave 532 nm laser to size and detect the particles, a pulsed 266 nm laser to ablate and ionize the particles, and a bipolar, Z-shaped time-of-flight mass spectrometer to detect positive and negative ions. The ALABAMA fits into a 19”-aircraft rack of 150 cm height and has a total weight of 140 kg, thus currently being one of the smallest and lightest-weight instruments of its type. We present a detailed characterization of ALABAMA with respect to particle beam width, detection and ablation efficiency, and example mass spectra of different particle types. The first aircraft-based field mission was performed within the MEGAPOLI summer campaign in July 2009 around Paris, France, onboard an ATR42 aircraft. During 11 research flights, corresponding to a total measuring time of approximately 44 hours, ALABAMA measured 6502 single particle mass spectra. The mass spectra were classified into eight particle classes using distinctive markers for each particle type. The most abundant particle types contained organic and secondary inorganic compounds. The results further show that differences in the abundance of observed particle types between different air masses are very pronounced when comparing air masses arriving from the greater Paris area with air masses arriving from other directions.