气候变化领域集成服务门户(CCPortal): CCN measurements at the Princess Elisabeth Antarctica research station during three austral summers

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DOI	10.5194/acp-19-275-2019
	CCN measurements at the Princess Elisabeth Antarctica research station during three austral summers
	Herenz P.; Wex H.; Mangold A.; Laffineur Q.; Gorodetskaya I.V.; Fleming Z.L.; Panagi M.; Stratmann F.
发表日期	2019
ISSN	16807316
起始页码	275
结束页码	294
卷号	19 期号:1
英文摘要	For three austral summer seasons (2013-2016, each from December to February) aerosol particles arriving at the Belgian Antarctic research station Princess Elisabeth (PE) in Dronning Maud Land in East Antarctica were characterized. This included number concentrations of total aerosol particles (N CN ) and cloud condensation nuclei (N CCN ), the particle number size distribution (PNSD), the aerosol particle hygroscopicity, and the influence of the air mass origin on N CN and N CCN . In general N CN was found to range from 40 to 6700cm -3 , with a median of 333cm -3 , while N CCN was found to cover a range between less than 10 and 1300cm-3 for supersaturations (SSs) between 0.1% and 0.7%. It is shown that the aerosol is dominated by the Aitken mode, being characterized by a significant amount of small, and therefore likely secondarily formed, aerosol particles, with 94% and 36% of the aerosol particles smaller than 90 and ≈35nm, respectively. Measurements of the basic meteorological parameters as well as the history of the air masses arriving at the measurement station indicate that the station is influenced by both marine air masses originating from the Southern Ocean and coastal areas around Antarctica (marine events - MEs) and continental air masses (continental events - CEs). CEs, which were defined as instances when the air masses spent at least 90% of the time over the Antarctic continent during the last 10 days prior to arrival at the measurements station, occurred during 61% of the time during which measurements were done. CEs came along with rather constant N CN and N CCN values, which we denote as Antarctic continental background concentrations. MEs, however, cause large fluctuations in N CN and N CCN , with low concentrations likely caused by scavenging due to precipitation and high concentrations likely originating from new particle formation (NPF) based on marine precursors. The application of HYSPLIT back trajectories in form of the potential source contribution function (PSCF) analysis indicate that the region of the Southern Ocean is a potential source of Aitken mode particles. On the basis of PNSDs, together with N CCN measured at an SS of 0.1%, median values for the critical diameter for cloud droplet activation and the aerosol particle hygroscopicity parameter ° were determined to be 110nm and 1, respectively. For particles larger than ĝ‰110nm the Southern Ocean together with parts of the Antarctic ice shelf regions were found to be potential source regions. While the former may contribute sea spray particles directly, the contribution of the latter may be due to the emission of sea salt aerosol particles, released from snow particles from surface snow layers, e.g., during periods of high wind speed, leading to drifting or blowing snow. The region of the Antarctic inland plateau, however, was not found to feature a significant source region for aerosol particles in general or page276 for cloud condensation nuclei measured at the PE station in the austral summer. © 2018 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	aerosol; cloud condensation nucleus; concentration (composition); point source; research work; sea salt; size distribution; summer; supersaturation; weather station; Antarctica; East Antarctica; Princess Elizabeth Land; Southern Ocean
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/144737
作者单位	Leibniz Institute for Tropospheric Research, Leipzig, Germany; Senate Department for the Environment, Transport and Climate Protection, Berlin, Germany; Royal Meteorological Institute of Belgium, Brussels, Belgium; Centre for Environmental and Marine Studies, Department of Physics, University of Aveiro, Aveiro, Portugal; Department of Earth and Environmental Sciences, KU Leuven, Leuven, Belgium; National Centre for Atmospheric Science, Department of Chemistry, University of Leicester, Leicester, United Kingdom
推荐引用方式 GB/T 7714	Herenz P.,Wex H.,Mangold A.,et al. CCN measurements at the Princess Elisabeth Antarctica research station during three austral summers[J],2019,19(1).
APA	Herenz P..,Wex H..,Mangold A..,Laffineur Q..,Gorodetskaya I.V..,...&Stratmann F..(2019).CCN measurements at the Princess Elisabeth Antarctica research station during three austral summers.Atmospheric Chemistry and Physics,19(1).
MLA	Herenz P.,et al."CCN measurements at the Princess Elisabeth Antarctica research station during three austral summers".Atmospheric Chemistry and Physics 19.1(2019).