气候变化领域集成服务门户(CCPortal): Aerosol hygroscopicity and its link to chemical composition in the coastal atmosphere of Mace Head: Marine and continental air masses

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DOI	10.5194/acp-20-3777-2020
	Aerosol hygroscopicity and its link to chemical composition in the coastal atmosphere of Mace Head: Marine and continental air masses
	Xu W.; Ovadnevaite J.; Fossum K.N.; Lin C.; Huang R.-J.; O'Dowd C.; Ceburnis D.
发表日期	2020
ISSN	16807316
起始页码	3777
结束页码	3791
卷号	20 期号:6
英文摘要	Chemical composition and hygroscopicity closure of marine aerosol in high time resolution has not been achieved yet due to the difficulty involved in measuring the refractory sea-salt concentration in near-real time. In this study, attempts were made to achieve closure for marine aerosol based on a humidified tandem differential mobility analyser (HTDMA) and a high-resolution time-of-flight aerosol mass spectrometer (AMS) for wintertime aerosol at Mace Head, Ireland. The aerosol hygroscopicity was examined as a growth factor (GF) at 90% relative humidity (RH). The corresponding GFs of 35, 50, 75, 110 and 165 nm particles were 1:540:26, 1:600:29, 1:660:31, 1:720:29 and 1:780:30 (meanstandard deviation), respectively. Two contrasting air masses (continental and marine) were selected to study the temporal variation in hygroscopicity; the results demonstrated a clear diurnal pattern in continental air masses, whereas no diurnal pattern was found in marine air masses. In addition, wintertime aerosol was observed to be largely externally mixed in both of the contrasting air masses. Concurrent high time resolution PM1 (particulate matter 1 um) chemical composition data from combined AMS and MAAP measurements, comprising organic matter, non-sea-salt sulfate, nitrate, ammonium, sea salt and black carbon (BC), were used to predict aerosol hygroscopicity with the Zdanovskii-Stokes-Robinson (ZSR) mixing rule. Overall, good agreement (an R2 value of 0.824 and a slope of 1.02) was found between the growth factor of 165 nm particles measured by the HTDMA (GFHTDMA) and the growth factor derived from the AMSCMAAP bulk chemical composition (GFAMS). Over 95% of the estimated GF values exhibited less than a 10%deviation for the whole dataset, and this deviation was mostly attributed to the neglected mixing state as a result of the bulk PM1 composition. © 2020 BMJ Publishing Group. All rights reserved.
关键词	aerosol air mass chemical composition hygroscopicity marine atmosphere mass spectrometry relative humidity winter Connacht Galway [(CNT) Connacht]Ireland Mace Head
语种	英语
来源机构	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132135
推荐引用方式 GB/T 7714	Xu W.,Ovadnevaite J.,Fossum K.N.,et al. Aerosol hygroscopicity and its link to chemical composition in the coastal atmosphere of Mace Head: Marine and continental air masses[J]. Atmospheric Chemistry and Physics,2020,20(6).
APA	Xu W..,Ovadnevaite J..,Fossum K.N..,Lin C..,Huang R.-J..,...&Ceburnis D..(2020).Aerosol hygroscopicity and its link to chemical composition in the coastal atmosphere of Mace Head: Marine and continental air masses.,20(6).
MLA	Xu W.,et al."Aerosol hygroscopicity and its link to chemical composition in the coastal atmosphere of Mace Head: Marine and continental air masses".20.6(2020).