气候变化领域集成服务门户(CCPortal): How alkaline compounds control atmospheric aerosol particle acidity

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DOI	10.5194/acp-21-14983-2021
	How alkaline compounds control atmospheric aerosol particle acidity
	Karydis V.A.; Tsimpidi A.P.; Pozzer A.; Lelieveld J.
发表日期	2021
ISSN	1680-7316
起始页码	14983
结束页码	15001
卷号	21 期号:19
英文摘要	The acidity of atmospheric particulate matter regulates its mass, composition, and toxicity and has important consequences for public health, ecosystems and climate. Despite these broad impacts, the global distribution and evolution of aerosol particle acidity are unknown. We used the comprehensive atmospheric multiphase chemistry-climate model EMAC (ECHAM5/MESSy Atmospheric Chemistry) to investigate the main factors that control aerosol particle acidity and uncovered remarkable variability and unexpected trends during the past 50 years in different parts of the world. Aerosol particle acidity decreased strongly over Europe and North America during the past decades while at the same time it increased over Asia. Our simulations revealed that these particle acidity trends are strongly related to changes in the phase partitioning of nitric acid, production of sulfate in aqueous aerosols, and the aerosol hygroscopicity. It is remarkable that the aerosol hygroscopicity (κ) has increased in many regions following the particle pH. Overall, we find that alkaline compounds, notably ammonium and to a lesser extent crustal cations, regulate the particle pH on a global scale. Given the importance of aerosol particles for the atmospheric energy budget, cloud formation, pollutant deposition, and public health, alkaline species hold the key to control strategies for air quality and climate change. © Copyright:
语种	英语
scopus关键词	acidity; aerosol composition; air quality; alkalinity; atmospheric chemistry; cation; climate modeling; hygroscopicity; nitric acid; particle size; pH; sulfate
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/246499
作者单位	Atmospheric Chemistry Dept., Max Planck Institute for Chemistry, Mainz, 55128, Germany; Inst. for Energy and Climate Research, IEK-8, Forschungszentrum Jülich, Jülich, 52425, Germany; Inst. for Environmental Research and Sustainable Development, National Observatory of Athens, Athens, 15236, Greece; International Centre for Theoretical Physics, Trieste, 34151, Italy; The Cyprus Institute, Climate and Atmosphere Research Center, Nicosia, 1645, Cyprus
推荐引用方式 GB/T 7714	Karydis V.A.,Tsimpidi A.P.,Pozzer A.,et al. How alkaline compounds control atmospheric aerosol particle acidity[J],2021,21(19).
APA	Karydis V.A.,Tsimpidi A.P.,Pozzer A.,&Lelieveld J..(2021).How alkaline compounds control atmospheric aerosol particle acidity.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(19).
MLA	Karydis V.A.,et al."How alkaline compounds control atmospheric aerosol particle acidity".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.19(2021).