气候变化领域集成服务门户(CCPortal): Aerosol pH and liquid water content determine when particulate matter is sensitive to ammonia and nitrate availability

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DOI	10.5194/acp-20-3249-2020
	Aerosol pH and liquid water content determine when particulate matter is sensitive to ammonia and nitrate availability
	Nenes A.; Pandis S.N.; Weber R.J.; Russell A.
发表日期	2020
ISSN	16807316
起始页码	3249
结束页码	3258
卷号	20 期号:5
英文摘要	Nitrogen oxides (NOx ) and ammonia (NH3) from anthropogenic and biogenic emissions are central contributors to particulate matter (PM) concentrations worldwide. The response of PM to changes in the emissions of both compounds is typically studied on a case-by-case basis, owing in part to the complex thermodynamic interactions of these aerosol precursors with other PM constituents. Here we present a simple but thermodynamically consistent approach that expresses the chemical domains of sensitivity of aerosol particulate matter to NH3 and HNO3 availability in terms of aerosol pH and liquid water content. From our analysis, four policy-relevant regimes emerge in terms of sensitivity: (i) NH3 sensitive, (ii) HNO3 sensitive, (iii) NH3 and HNO3 sensitive, and (iv) insensitive to NH3 or HNO3. For all regimes, the PM remains sensitive to nonvolatile precursors, such as nonvolatile cations and sulfate. When this framework is applied to ambient measurements or predictions of PM and gaseous precursors, the "chemical regime" of PM sensitivity to NH3 and HNO3 availability is directly determined. The use of these regimes allows for novel insights, and this framework is an important tool to evaluate chemical transport models. With this extended understanding, aerosol pH and associated liquid water content naturally emerge as previously ignored state parameters that drive PM formation. © Author(s) 2020.
关键词	aerosol composition ammonia nitrate particulate matter pH sensitivity analysis thermodynamics transport process water content
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/132162
推荐引用方式 GB/T 7714	Nenes A.,Pandis S.N.,Weber R.J.,et al. Aerosol pH and liquid water content determine when particulate matter is sensitive to ammonia and nitrate availability[J]. Atmospheric Chemistry and Physics,2020,20(5).
APA	Nenes A.,Pandis S.N.,Weber R.J.,&Russell A..(2020).Aerosol pH and liquid water content determine when particulate matter is sensitive to ammonia and nitrate availability.,20(5).
MLA	Nenes A.,et al."Aerosol pH and liquid water content determine when particulate matter is sensitive to ammonia and nitrate availability".20.5(2020).