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DOI	10.5194/acp-21-17099-2021
	Chemical composition of nanoparticles from α-pinene nucleation and the influence of isoprene and relative humidity at low temperature
	Caudillo L.; Rörup B.; Heinritzi M.; Marie G.; Simon M.; Wagner A.C.; Müller T.; Granzin M.; Amorim A.; Ataei F.; Baalbaki R.; Bertozzi B.; Brasseur Z.; Chiu R.; Chu B.; Dada L.; Duplissy J.; Finkenzeller H.; Gonzalez Carracedo L.; He X.-C.; Hofbauer V.; Kong W.; Lamkaddam H.; Lee C.P.; Lopez B.; Mahfouz N.G.A.; Makhmutov V.; Manninen H.E.; Marten R.; Massabò D.; Mauldin R.L.; Mentler B.; Molteni U.; Onnela A.; Pfeifer J.; Philippov M.; Piedehierro A.A.; Schervish M.; Scholz W.; Schulze B.; Shen J.; Stolzenburg D.; Stozhkov Y.; Surdu M.; Tauber C.; Tham Y.J.; Tian P.; Tomé A.; Vogt S.; Wang M.; Wang D.S.; Weber S.K.; Welti A.; Yonghong W.; Yusheng W.; Zauner-Wieczorek M.; Baltensperger U.; El Haddad I.; Flagan R.C.; Hansel A.; Höhler K.; Kirkby J.; Kulmala M.; Lehtipalo K.; Möhler O.; Saathoff H.; Volkamer R.; Winkler P.M.; Donahue N.M.; Kürten A.; Curtius J.
发表日期	2021
ISSN	1680-7316
起始页码	17099
结束页码	17114
卷号	21 期号:22
英文摘要	Biogenic organic precursors play an important role in atmospheric new particle formation (NPF). One of the major precursor species is α-pinene, which upon oxidation can form a suite of products covering a wide range of volatilities. Highly oxygenated organic molecules (HOMs) comprise a fraction of the oxidation products formed. While it is known that HOMs contribute to secondary organic aerosol (SOA) formation, including NPF, they have not been well studied in newly formed particles due to their very low mass concentrations. Here we present gas-and particle-phase chemical composition data from experimental studies of α-pinene oxidation, including in the presence of isoprene, at temperatures (-50 and-30 C) and relative humidities (20% and 60%) relevant in the upper free troposphere. The measurements took place at the CERN Cosmics Leaving Outdoor Droplets (CLOUD) chamber. The particle chemical composition was analyzed by a thermal desorption differential mobility analyzer (TD-DMA) coupled to a nitrate chemical ionization-atmospheric pressure interface-time-of-flight (CI-APi-TOF) mass spectrometer. CI-APi-TOF was used for particle-and gas-phase measurements, applying the same ionization and detection scheme. Our measurements revealed the presence of C8-10 monomers and C18-20 dimers as the major compounds in the particles (diameter up to ∼100nm). Particularly, for the system with isoprene added, C5 (C5H10O5-7) and C15 compounds (C15H24O5-10) were detected. This observation is consistent with the previously observed formation of such compounds in the gas phase. However, although the C5 and C15 compounds do not easily nucleate, our measurements indicate that they can still contribute to the particle growth at free tropospheric conditions. For the experiments reported here, most likely isoprene oxidation products enhance the growth of particles larger than 15nm. Additionally, we report on the nucleation rates measured at 1.7nm (J1.7nm) and compared with previous studies, we found lower J1.7nm values, very likely due to the higher α-pinene and ozone mixing ratios used in the present study. © 2021 Lucía Caudillo et al.
语种	英语
scopus关键词	aerosol formation; chemical composition; isoprene; low temperature; nanoparticle; nucleation; relative humidity
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246413
作者单位	Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, Frankfurt am Main, 60438, Germany; Institute for Atmospheric and Earth System Research (INAR)/Physics, Faculty of Science, University of Helsinki, Helsinki, 00014, Finland; Department of Chemistry and Cires, University of Colorado Boulder, Boulder, CO 80309-0215, United States; Atmospheric Chemistry Department, Max Planck Institute for Chemistry, Mainz, 55128, Germany; Centra and Fcul, University of Lisbon, Lisbon, 1749-016, Portugal; Leibniz Institute for Tropospheric Research, Leipzig, 04318, Germany; Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, 76344, Germany; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen, 5232, Switzerland; Helsinki Institute of Physics (HIP)/Physics, Faculty of Science, University of Helsinki, Helsinki, 00014, Finland; Faculty of Physics, University of Vienna, Vienna, 1090, Austria; Center for Atmospheric Particle ...
推荐引用方式 GB/T 7714	Caudillo L.,Rörup B.,Heinritzi M.,et al. Chemical composition of nanoparticles from α-pinene nucleation and the influence of isoprene and relative humidity at low temperature[J],2021,21(22).
APA	Caudillo L..,Rörup B..,Heinritzi M..,Marie G..,Simon M..,...&Curtius J..(2021).Chemical composition of nanoparticles from α-pinene nucleation and the influence of isoprene and relative humidity at low temperature.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(22).
MLA	Caudillo L.,et al."Chemical composition of nanoparticles from α-pinene nucleation and the influence of isoprene and relative humidity at low temperature".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.22(2021).