气候变化领域集成服务门户(CCPortal): Quantifying Nitrous Acid Formation Mechanisms Using Measured Vertical Profiles During the CalNex 2010 Campaign and 1D Column Modeling

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DOI	10.1029/2021JD034689
	Quantifying Nitrous Acid Formation Mechanisms Using Measured Vertical Profiles During the CalNex 2010 Campaign and 1D Column Modeling
	Tuite K.; Thomas J.L.; Veres P.R.; Roberts J.M.; Stevens P.S.; Griffith S.M.; Dusanter S.; Flynn J.H.; Ahmed S.; Emmons L.; Kim S.-W.; Washenfelder R.; Young C.; Tsai C.; Pikelnaya O.; Stutz J.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:13
英文摘要	Nitrous acid (HONO) is an important radical precursor that can impact secondary pollutant levels, especially in urban environments. Due to uncertainties in its heterogeneous formation mechanisms, models often under predict HONO concentrations. A number of heterogeneous sources at the ground have been proposed but there is no consensus about which play a significant role in the urban boundary layer. We present a new one-dimensional chemistry and transport model which performs surface chemistry based on molecular collisions and chemical conversion, allowing us to add detailed HONO formation chemistry at the ground. We conducted model runs for the 2010 CalNex campaign, finding good agreement with observations for key species such as O3, NOx, and HOx. With the ground sources implemented, the model captures the diurnal and vertical profile of the HONO observations. Primary HOx production from HONO photolysis is 2–3 times more important than O3 or HCHO photolysis at mid-day, below 10 m. The HONO concentration, and its contribution to HOx, decreases quickly with altitude. Heterogeneous chemistry at the ground provided a HONO source of 2.5 × 1011 molecules cm−2 s−1 during the day and 5 × 1010 molecules cm−2 s−1 at night. The night time source was dominated by NO2 hydrolysis. During the day, photolysis of surface HNO3/nitrate contributed 45%–60% and photo-enhanced conversion of NO2 contributed 20%–45%. Sensitivity studies addressing the uncertainties in both photolytic mechanisms show that, while the relative contribution of either source can vary, HNO3/nitrate is required to produce a surface HONO source that is strong enough to explain observations. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	air pollution; atmospheric chemistry; CalNex; nitrous acid; surface chemistry
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/237148
作者单位	Department of Atmospheric and Oceanic Sciences, University of California Los Angeles, Los Angeles, CA, United States; Institut des Géosciences de l'Environnement, Université Grenoble Alpes, CNRS, IRD, Grenoble INP, Grenoble, France; Earth Systems Research Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO, United States; School of Public and Environmental Affairs and Department of Chemistry, Indiana University, Bloomington, IN, United States; Department of Atmospheric Sciences, National Central University, Taoyuan, Taiwan; Département Sciences de l'Atmosphére et Génie de l'Environnement, IMT Lille Douai, Université de Lille, Lille, France; Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX, United States; Atmospheric Chemistry Observations and Modeling Lab, National Center for Atmospheric Research, Boulder, CO, United States; Department of Atmospheric Sciences, Yonsei University, Seoul, South Korea; Department of Chemistry, York University, Ontario, Cana...
推荐引用方式 GB/T 7714	Tuite K.,Thomas J.L.,Veres P.R.,et al. Quantifying Nitrous Acid Formation Mechanisms Using Measured Vertical Profiles During the CalNex 2010 Campaign and 1D Column Modeling[J],2021,126(13).
APA	Tuite K..,Thomas J.L..,Veres P.R..,Roberts J.M..,Stevens P.S..,...&Stutz J..(2021).Quantifying Nitrous Acid Formation Mechanisms Using Measured Vertical Profiles During the CalNex 2010 Campaign and 1D Column Modeling.Journal of Geophysical Research: Atmospheres,126(13).
MLA	Tuite K.,et al."Quantifying Nitrous Acid Formation Mechanisms Using Measured Vertical Profiles During the CalNex 2010 Campaign and 1D Column Modeling".Journal of Geophysical Research: Atmospheres 126.13(2021).