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DOI	10.5194/acp-20-13069-2020
	Role of the dew water on the ground surface in HONO distribution: A case measurement in Melpitz
	Ren Y.; Stieger B.; Spindler G.; Grosselin B.; Mellouki A.; Tuch T.; Wiedensohler A.; Herrmann H.
发表日期	2020
ISSN	16807316
起始页码	13069
结束页码	13089
卷号	20 期号:21
英文摘要	To characterize the role of dew water for the ground surface HONO distribution, nitrous acid (HONO) measurements with a Monitor for AeRosols and Gases in ambient Air (MARGA) and a LOng Path Absorption Photometer (LOPAP) instrument were performed at the Leibniz Institute for Tropospheric Research (TROPOS) research site in Melpitz, Germany, from 19 to 29 April 2018. The dew water was also collected and analyzed from 8 to 14 May 2019 using a glass sampler. The high time resolution of HONO measurements showed characteristic diurnal variations that revealed that (i) vehicle emissions are a minor source of HONO at Melpitz station; (ii) the heterogeneous conversion of NO2 to HONO on the ground surface dominates HONO production at night; (iii) there is significant nighttime loss of HONO with a sink strength of 0.16±0.12ppbv h-1; and (iv) dew water with mean NO-2 of 7.91±2.14 μgm-2 could serve as a temporary HONO source in the morning when the dew droplets evaporate. The nocturnal observations of HONO and NO2 allowed the direct evaluation of the ground uptake coefficients for these species at night: γNO2→HONO = 2.4±10-7 to 3.5±10-6, γHONO;ground = 1.7×10-5 to 2.8×10-4. A chemical model demonstrated that HONO deposition to the ground surface at night was 90 %-100% of the calculated unknown HONO source in the morning. These results suggest that dew water on the ground surface was controlling the temporal HONO distribution rather than straightforward NO2-HONO conversion. This can strongly enhance the OH reactivity throughout the morning time or in other planted areas that provide a large amount of ground surface based on the OH production rate calculation. © 2020 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	aerosol composition; aerosol formation; ambient air; dew; diurnal variation; precipitation intensity; troposphere; Germany; Melpitz; Saxony; Varanidae
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/143835
作者单位	Institut de Combustion, Aérothermique, Réactivité et Environnement (ICARE), Cnrs (UPR 3021), Observatoire des Sciences de l'Univers en Région Centre (OSUC), 1C Avenue de la Recherche Scientifique, Orléans CEDEX 2, 45071, France; Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, Leipzig, 04318, Germany
推荐引用方式 GB/T 7714	Ren Y.,Stieger B.,Spindler G.,et al. Role of the dew water on the ground surface in HONO distribution: A case measurement in Melpitz[J],2020,20(21).
APA	Ren Y..,Stieger B..,Spindler G..,Grosselin B..,Mellouki A..,...&Herrmann H..(2020).Role of the dew water on the ground surface in HONO distribution: A case measurement in Melpitz.Atmospheric Chemistry and Physics,20(21).
MLA	Ren Y.,et al."Role of the dew water on the ground surface in HONO distribution: A case measurement in Melpitz".Atmospheric Chemistry and Physics 20.21(2020).