气候变化领域集成服务门户(CCPortal): Acidity across the interface from the ocean surface to sea spray aerosol

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DOI	10.1073/pnas.2018397118
	Acidity across the interface from the ocean surface to sea spray aerosol
	Angle K.J.; Crocker D.R.; Simpson R.M.C.; Mayer K.J.; Garofalo L.A.; Moore A.N.; Mora Garcia S.L.; Or V.W.; Srinivasan S.; Farhan M.; Sauer J.S.; Lee C.; Pothier M.A.; Farmer D.K.; Martz T.R.; Bertram T.H.; Cappa C.D.; Prather K.A.; Grassian V.H.
发表日期	2021
ISSN	00278424
卷号	118 期号:2
英文摘要	Aerosols impact climate, human health, and the chemistry of the atmosphere, and aerosol pH plays a major role in the physicochemical properties of the aerosol. However, there remains uncertainty as to whether aerosols are acidic, neutral, or basic. In this research, we show that the pH of freshly emitted (nascent) sea spray aerosols is significantly lower than that of sea water (approximately four pH units, with pH being a log scale value) and that smaller aerosol particles below 1 μm in diameter have pH values that are even lower. These measurements of nascent sea spray aerosol pH, performed in a unique ocean−atmosphere facility, provide convincing data to show that acidification occurs “across the interface” within minutes, when aerosols formed from ocean surface waters become airborne. We also show there is a correlation between aerosol acidity and dissolved carbon dioxide but no correlation with marine biology within the seawater. We discuss the mechanisms and contributing factors to this acidity and its implications on atmospheric chemistry. © This open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND).
英文关键词	Acidity; Aerosols; Sea spray
语种	英语
scopus关键词	carbon dioxide; sea water; aerosol; airborne particle; Article; chemical composition; controlled study; correlational study; environmental monitoring; marine biology; ocean acidification; pH; physical chemistry; priority journal; sample size; sea pollution
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/181078
作者单位	Department of Chemistry and Biochemistry, University of California San Diego, San Diego, CA 92093, United States; Scripps Institution of Oceanography, University of California San Diego, San Diego, CA 92093, United States; Department of Chemistry, Colorado State University, Fort Collins, CO 80523, United States; Department of Chemistry, University of Wisconsin−Madison, Madison, WI 53706, United States; Department of Civil and Environmental Engineering, University of California, Davis, CA 95616, United States; Department of Nanoengineering, University of California San Diego, San Diego, CA 92093, United States
推荐引用方式 GB/T 7714	Angle K.J.,Crocker D.R.,Simpson R.M.C.,et al. Acidity across the interface from the ocean surface to sea spray aerosol[J],2021,118(2).
APA	Angle K.J..,Crocker D.R..,Simpson R.M.C..,Mayer K.J..,Garofalo L.A..,...&Grassian V.H..(2021).Acidity across the interface from the ocean surface to sea spray aerosol.Proceedings of the National Academy of Sciences of the United States of America,118(2).
MLA	Angle K.J.,et al."Acidity across the interface from the ocean surface to sea spray aerosol".Proceedings of the National Academy of Sciences of the United States of America 118.2(2021).