Sub-3 nm Particles Detection in a Large Photoreactor Background: Possible Implications for New Particles Formation Studies in a Smog Chamber
Sub-3 nm Particles Detection in a Large Photoreactor Background: Possible Implications for New Particles Formation Studies in a Smog Chamber
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大型光反应器背景中的亚 3 nm 颗粒检测：对烟雾室中新颗粒形成研究的可能影响
DOI：
10.1080/02786826.2012.733040
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发表时间：
2012
影响因子：
5.2
通讯作者：
J.‐F. Doussin
中科院分区：
文献类型：
--
作者：
Boulon;K. Sellegri;Y. Katrib;J. Wang;K. Miet;B. Langmann;P. Laj;J.‐F. Doussin
在实验多相大气模拟室（CESAM）雾霾室中进行了新粒子形成实验。在模拟大气条件下，利用中性簇和空气离子谱仪监测了杉木烯暗臭氧分解过程中0.8 ~ 42 nm的成核过程。测量结果表明，即使在非常干净的控制条件下，在1-2 nm尺寸范围内也存在大量的预先存在的簇。数值模拟实验表明，通过有机蒸汽的活化，9-67%的已有簇可以解释sabinene氧化时形成的新颗粒数量，并且可冷凝蒸汽浓度的增加有助于增加百分比。这些发现表明，在导出成核参数化之前，必须仔细表征大气模拟室背景的亚3纳米中性团簇浓度含量。美国气溶胶研究协会版权所有
New particles formation experiments have been conducted in the experimental multiphasic atmospheric simulation chamber (CESAM) smog chamber. The nucleation events generated during the dark ozonolysis of sabinene were monitored using a neutral cluster and air ions spectrometer in the size range 0.8–42 nm under simulated atmospheric conditions. The measurements show that a significant amount of pre-existing clusters exist in the 1–2 nm size range even in very clean controlled conditions. Numerical modeling experiments indicate that a range of 9–67% of pre-existing clusters can explain, through activation by organic vapors, the number of new particles formed when sabinene is oxidized, with an increasing contributing fraction for increasing condensable vapor concentrations. These findings suggest that atmospheric simulation chambers backgrounds have to be carefully characterized for their sub-3-nm neutral cluster concentration content before nucleation parameterizations can be derived.Copyright 2013 American Association for Aerosol Research
影响因子：
6.3
作者：
Merikanto, J.;Spracklen, D. V.;Carslaw, K. S.
通讯作者：
Carslaw, K. S.