气候变化领域集成服务门户(CCPortal): Aerosol acidity and liquid water content regulate the dry deposition of inorganic reactive nitrogen

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DOI	10.5194/acp-21-6023-2021
	Aerosol acidity and liquid water content regulate the dry deposition of inorganic reactive nitrogen
	Nenes A.; Pandis S.N.; Kanakidou M.; Russell A.G.; Song S.; Vasilakos P.; Weber R.J.; Nenes A.
发表日期	2021
ISSN	1680-7316
起始页码	6023
结束页码	6033
卷号	21 期号:8
英文摘要	Ecosystem productivity is strongly modulated by the atmospheric deposition of inorganic reactive nitrogen (the sum of ammonium and nitrate). The individual contributions of ammonium and nitrate vary considerably over space and time, giving rise to complex patterns of nitrogen deposition. In the absence of rain, much of this complexity is driven by the large difference between the dry deposition velocity of nitrogen-containing molecules in the gas or condensed phase. Here we quantify how aerosol liquid water and acidity, through their impact on gas particle partitioning, modulate the deposition velocity of total NH3 and total HNO3 individually while simultaneously affecting the dry deposition of inorganic reactive nitrogen. Four regimes of deposition velocity emerge: (i) HNO3 fast, NH3 slow, (ii) HNO3 slow, NH3 fast, (iii) HNO3 fast, NH3 fast, and (iv) HNO3 slow, NH3 slow. Conditions that favor partitioning of species to the aerosol phase strongly reduce the local deposition of reactive nitrogen species and promote their accumulation in the boundary layer and potential for long-range transport. Application of this framework to select locations around the world reveals fundamentally important insights: The dry deposition of total ammonia displays little sensitivity to pH and liquid water variations, except under conditions of extreme acidity and/or low aerosol liquid water content. The dry deposition of total nitric acid, on the other hand, is quite variable, with maximum deposition velocities (close to gas deposition rates) found in the eastern United States and minimum velocities in northern Europe and China. In the latter case, the low deposition velocity leads to up to 10-fold increases in PM2:5 nitrate aerosol, thus contributing to the high PM2:5 levels observed during haze episodes. In this light, aerosol pH and associated liquid water content can be considered to be control parameters that drive dry deposition flux and can accelerate the accumulation of aerosol contributing to intense haze events throughout the globe. © 2021 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	aerosol composition; aerosol formation; atmospheric deposition; dry deposition; long range transport; nitrogen; parameter estimation; trace element; China; Europe; United States
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/246958
作者单位	Institute for Chemical Engineering Sciences, Foundation for Research and Technology Hellas, Patras, 26504, Greece; School of Architecture, Civil and Environmental Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, 1015, Switzerland; Department of Chemical Engineering, University of Patras, Patras, 26504, Greece; Environmental Chemical Processes Laboratory, Department of Chemistry, University of Crete, Voutes, Heraklion, Crete, 70013, Greece; School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States; School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, United States; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30332, United States
推荐引用方式 GB/T 7714	Nenes A.,Pandis S.N.,Kanakidou M.,et al. Aerosol acidity and liquid water content regulate the dry deposition of inorganic reactive nitrogen[J],2021,21(8).
APA	Nenes A..,Pandis S.N..,Kanakidou M..,Russell A.G..,Song S..,...&Nenes A..(2021).Aerosol acidity and liquid water content regulate the dry deposition of inorganic reactive nitrogen.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(8).
MLA	Nenes A.,et al."Aerosol acidity and liquid water content regulate the dry deposition of inorganic reactive nitrogen".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.8(2021).