气候变化领域集成服务门户(CCPortal): Investigation of new particle formation mechanisms and aerosol processes at Marambio Station, Antarctic Peninsula

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DOI	10.5194/acp-22-8417-2022
	Investigation of new particle formation mechanisms and aerosol processes at Marambio Station, Antarctic Peninsula
	Quelever, Lauriane L. J.; Dada, Lubna; Asmi, Eija; Lampilahti, Janne; Chan, Tommy; Ferrara, Jonathan E.; Copes, Gustavo E.; Perez-Fogwill, German; Barreira, Luis; Aurela, Minna; Worsnop, Douglas R.; Jokinen, Tuija; Sipila, Mikko
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	8417
结束页码	8437
卷号	22 期号:12 页码:21
英文摘要	Understanding chemical processes leading to the formation of atmospheric aerosol particles is crucial to improve our capabilities in predicting the future climate. However, those mechanisms are still inadequately characterized, especially in polar regions. In this study, we report observations of neutral and charged aerosol precursor molecules and chemical cluster composition (qualitatively and quantitatively), as well as air ions and aerosol particle number concentrations and size distributions from the Marambio research station (64 degrees 15' S, 56 degrees 38' W), located north of the Antarctic Peninsula. We conducted measurements during the austral summer, between 15 January and 25 February 2018. The scope of this study is to characterize new particle formation (NPF) event parameters and connect our observations of gas-phase compounds with the formation of secondary aerosols to resolve the nucleation mechanisms at the molecular scale. NPF occurred on 40% of measurement days. All NPF events were observed during days with high solar radiation, mostly with above-freezing temperatures and with low relative humidity. The averaged formation rate for 3 nm particles (J(3)) was 0.686 cm(-3) s(-1), and the average particle growth rate (GR(3.8-12 nm)) was 4.2 nm h(-1). Analysis of neutral aerosol precursor molecules showed measurable concentrations of iodic acid (IA), sulfuric acid (SA), and methane sulfonic acid (MSA) throughout the entire measurement period with significant increase in MSA and SA concentrations during NPF events. We highlight SA as a key contributor to NPF processes, while IA and MSA likely only contribute to particle growth. Mechanistically, anion clusters containing ammonia and/or dimethylamine (DMA) and SA were identified, suggesting significant concentration of ammonia and DMA as well. Those species are likely contributing to NPF events since SA alone is not sufficient to explain observed nucleation rates. Here, we provide evidence of the marine origin of the measured chemical precursors and discuss their potential contribution to the aerosol phase.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000819424300001
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/273199
作者单位	University of Helsinki; Swiss Federal Institutes of Technology Domain; Ecole Polytechnique Federale de Lausanne; Swiss Federal Institutes of Technology Domain; Paul Scherrer Institute; Finnish Meteorological Institute; Aerodyne Research
推荐引用方式 GB/T 7714	Quelever, Lauriane L. J.,Dada, Lubna,Asmi, Eija,et al. Investigation of new particle formation mechanisms and aerosol processes at Marambio Station, Antarctic Peninsula[J],2022,22(12):21.
APA	Quelever, Lauriane L. J..,Dada, Lubna.,Asmi, Eija.,Lampilahti, Janne.,Chan, Tommy.,...&Sipila, Mikko.(2022).Investigation of new particle formation mechanisms and aerosol processes at Marambio Station, Antarctic Peninsula.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(12),21.
MLA	Quelever, Lauriane L. J.,et al."Investigation of new particle formation mechanisms and aerosol processes at Marambio Station, Antarctic Peninsula".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.12(2022):21.