气候变化领域集成服务门户(CCPortal): Multiphase buffer theory explains contrasts in atmospheric aerosol acidity

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DOI	10.1126/SCIENCE.ABA3719
	Multiphase buffer theory explains contrasts in atmospheric aerosol acidity
	Zheng G.; Su H.; Wang S.; Andreae M.O.; Pöschl U.; Cheng Y.
发表日期	2020
ISSN	0036-8075
起始页码	1374
结束页码	1377
卷号	369 期号:6509
英文摘要	Aerosol acidity largely regulates the chemistry of atmospheric particles, and resolving the drivers of aerosol pH is key to understanding their environmental effects. We find that an individual buffering agent can adopt different buffer pH values in aerosols and that aerosol pH levels in populated continental regions are widely buffered by the conjugate acid-base pair NH4+/NH3 (ammonium/ ammonia). We propose a multiphase buffer theory to explain these large shifts of buffer pH, and we show that aerosol water content and mass concentration play a more important role in determining aerosol pH in ammonia-buffered regions than variations in particle chemical composition. Our results imply that aerosol pH and atmospheric multiphase chemistry are strongly affected by the pervasive human influence on ammonia emissions and the nitrogen cycle in the Anthropocene. © 2020 The Authors.
英文关键词	ammonia; nitrate; nitric acid; sulfate; sulfur dioxide; sulfuric acid; acidity; aerosol; Anthropocene; atmospheric chemistry; chemical composition; emission; nitrogen cycle; pH; acid base balance; acid dissociation constant; acidity; aerosol; air pollution; air pollution control; alkalinity; aqueous solution; Article; carbon footprint; chemical composition; chemical interaction; China; climate change; comparative study; concentration (parameter); Europe; human; humidity; India; low temperature; mathematical model; nitrogen cycle; nonaqueous phase liquid; partition coefficient; prediction; priority journal; simulation; thermodynamics; United States; urban area; urban population; water content; water temperature; winter
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246170
作者单位	Minerva Research Group, Max Planck Institute for Chemistry, Mainz, 55128, Germany; Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, 55128, Germany; Scripps Institution of Oceanography, University of California, San Diego, San Diego, CA 92093, United States; Department of Geology and Geophysics, King Saud University, Riyadh, 11451, Saudi Arabia
推荐引用方式 GB/T 7714	Zheng G.,Su H.,Wang S.,et al. Multiphase buffer theory explains contrasts in atmospheric aerosol acidity[J],2020,369(6509).
APA	Zheng G.,Su H.,Wang S.,Andreae M.O.,Pöschl U.,&Cheng Y..(2020).Multiphase buffer theory explains contrasts in atmospheric aerosol acidity.Science,369(6509).
MLA	Zheng G.,et al."Multiphase buffer theory explains contrasts in atmospheric aerosol acidity".Science 369.6509(2020).