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DOI	10.5194/acp-22-3525-2022
	Interpretation of NO3-N2O5 observation via steady state in high-aerosol air mass: the impact of equilibrium coefficient in ambient conditions
	Chen, Xiaorui; Wang, Haichao; Lu, Keding
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	3525
结束页码	3533
卷号	22 期号:5 页码:9
英文摘要	Steady-state approximation for interpreting NO3 and N2O5 has large uncertainty under complicated ambient conditions and could even produce incorrect results unconsciously. To provide an assessment and solution to the dilemma, we formulate datasets based on in situ observations to reassess the applicability of the method. In most of steady-state cases, we find a prominent discrepancy between K-eq (equilibrium coefficient for reversible reactions of NO3 and N2O5) and correspondingly simulated [N2O5]/([NO2] x [NO3]), especially under high-aerosol conditions in winter. This gap reveals that the accuracy of K-eq has a critical impact on the steady-state analysis in polluted regions. In addition, the accuracy of gamma (N2O5) derived by steady-state fit depends closely on the reactivity of NO3 (kNO(3)) and N2O5(kN(2)O(5)). Based on a complete set of simulations, air mass of kNO(3) less than 0.01 s(-)(1) with high aerosol and temperature higher than 10 degrees C is suggested to be the best suited for steady-state analysis of NO3-N2O5 chemistry. Instead of confirming the validity of steady state by numerical modeling for every case, this work directly provides appropriate concentration ranges for accurate steady-state approximation, with implications for choosing suited methods to interpret nighttime chemistry in high-aerosol air mass.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000772539000001
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/273022
作者单位	Peking University; Peking University; Sun Yat Sen University; Southern Marine Science & Engineering Guangdong Laboratory; Southern Marine Science & Engineering Guangdong Laboratory (Zhuhai)
推荐引用方式 GB/T 7714	Chen, Xiaorui,Wang, Haichao,Lu, Keding. Interpretation of NO3-N2O5 observation via steady state in high-aerosol air mass: the impact of equilibrium coefficient in ambient conditions[J],2022,22(5):9.
APA	Chen, Xiaorui,Wang, Haichao,&Lu, Keding.(2022).Interpretation of NO3-N2O5 observation via steady state in high-aerosol air mass: the impact of equilibrium coefficient in ambient conditions.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(5),9.
MLA	Chen, Xiaorui,et al."Interpretation of NO3-N2O5 observation via steady state in high-aerosol air mass: the impact of equilibrium coefficient in ambient conditions".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.5(2022):9.