Online single particle analysis of ice particle residuals from mountain-top mixed-phase clouds using laboratory derived particle type assignment
Online single particle analysis of ice particle residuals from mountain-top mixed-phase clouds using laboratory derived particle type assignment
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DOI：
10.5194/acp-17-575-2017
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发表时间：
2017-01-12
影响因子：
6.3
通讯作者：
Borrmann, Stephan
中科院分区：
文献类型：
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作者：
Schmidt, Susan;Schneider, Johannes;Borrmann, Stephan
在高海拔研究站少女峰（3580ma.s.l.）的密集INNOP-JFJ/CLACE活动期间，通过激光烧蚀质谱法对冰颗粒残留物（IPRs）和云外气溶胶颗粒进行了原位单颗粒分析。2013年1月至2月。在为期4周的活动中，分析了70000多个云外气溶胶颗粒和595个IPR，覆盖粒径范围从100 nm到3 μ m。在273小时内对IPR进行了采样，当时台站被混合相云覆盖，环境温度在-27至-6摄氏度之间。颗粒类型的确定是基于对不同类型的生物、矿物和人为气溶胶颗粒的实验室研究。这些实验室研究的结果是每种研究颗粒类型的特征标记物峰。将这些标记物峰应用于现场数据。在采样的IPR中，我们确定了一个更大的主要气溶胶颗粒的数量分数，如土壤灰尘（13 +/-5%）和矿物质（11 +/- 5%），相比之下，云外气溶胶颗粒（分别为2.4 +/- 0.4和0.4 +/-0.1%）。此外，还发现工业排放物和含铅颗粒等人为气溶胶颗粒在知识产权中比在云外气溶胶中更丰富。在云外气溶胶中，我们确定了很大一部分老化颗粒（31 +/-5%），包括有机物质和次生无机物，而这种颗粒类型在IPR中的含量要少得多（2.7 +/-1.3%）。在选定的数据子集中，可以直接比较云外气溶胶颗粒和起源相似的气团中的IPR，在IPR中发现生物颗粒的显着增强。
In situ single particle analysis of ice particle residuals (IPRs) and out-of-cloud aerosol particles was conducted by means of laser ablation mass spectrometry during the intensive INUIT-JFJ/CLACE campaign at the high alpine research station Jungfraujoch (3580ma.s.l.) in January-February 2013. During the 4-week campaign more than 70 000 out-of-cloud aerosol particles and 595 IPRs were analyzed covering a particle size diameter range from 100 nm to 3 mu m. The IPRs were sampled during 273 h while the station was covered by mixed-phase clouds at ambient temperatures between -27 and -6 degrees C. The identification of particle types is based on laboratory studies of different types of biological, mineral and anthropogenic aerosol particles. The outcome of these laboratory studies was characteristic marker peaks for each investigated particle type. These marker peaks were applied to the field data. In the sampled IPRs we identified a larger number fraction of primary aerosol particles, like soil dust (13 +/- 5 %) and minerals (11 +/- 5%), in comparison to out-of- cloud aerosol particles (2.4 +/- 0.4 and 0.4 +/- 0.1 %, respectively). Additionally, anthropogenic aerosol particles, such as particles from industrial emissions and lead-containing particles, were found to be more abundant in the IPRs than in the out-of-cloud aerosol. In the out-of- cloud aerosol we identified a large fraction of aged particles (31 +/- 5 %), including organic mate-rial and secondary inorganics, whereas this particle type was much less abundant (2.7 +/- 1.3 %) in the IPRs. In a selected subset of the data where a direct comparison between out-of-cloud aerosol particles and IPRs in air masses with similar origin was possible, a pronounced enhancement of biological particles was found in the IPRs.