气候变化领域集成服务门户(CCPortal): An Observational Based Modeling of the Surface Layer Particulate Nitrate in the North China Plain During Summertime

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DOI	10.1029/2021JD035623
	An Observational Based Modeling of the Surface Layer Particulate Nitrate in the North China Plain During Summertime
	Tan Z.; Wang H.; Lu K.; Dong H.; Liu Y.; Zeng L.; Hu M.; Zhang Y.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:18
英文摘要	Particulate nitrate (pNO3−) is an important component in atmospheric fine particulate matter. Here, we present a case study investigating the production and loss processes of pNO3− in surface-layer based on the observation at a regional site Wangdu in North China Plain (NCP) during summer. The averaged diurnal of nitric acid (HNO3) production reached a maximum of 1.5 μg m−3 h−1 determined from the observed OH and NO2, indicating a fast HNO3 production in the surface layer during the daytime. The chemical processes affecting surface nitrate concentration and daily variation were simulated by a box model based on the Regional Atmospheric Chemical Mechanism version 2 and coupled with the ISORROPIA-II thermodynamic equilibrium model. The chemical formation of total soluble nitrate (TNO3) at the surface layer cannot explain the fast increase of pNO3− in the morning and overshoot pNO3− in the afternoon, suggesting missing processes in the model. The pNO3− budget analysis suggests the importance of entrainment from residual layer air into the surface layer as an important process for surface pNO3− concentration enhancement in the early morning. In the afternoon, the partition to pNO3− was limited due to the high temperature near the ground. Nevertheless, the observed fast nitrate production still significantly overshot pNO3− in the afternoon. This difference indicates HNO3 production was less efficient throughout the boundary layer than what was observed in the surface layer. Our results highlight the importance of vertical measurements to understand the formation mechanism of nitrate pollution in summer. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	budget; formation mechanism; particulate nitrate; PM2.5; vertical gradient
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/237017
作者单位	State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, China; Institute of Energy and Climate Research, IEK-8: Troposphere, Forschungszentrum Jülich GmbH, Jülich, Germany; International Joint laboratory for Regional pollution Control (IJRC), Peking University, Beijing, China; School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou, China; Guangdong Provincial Observation and Research Station for Climate Environment and Air Quality Change in the Pearl River Estuary, Key Laboratory of Tropical Atmosphere-Ocean System, Ministry of Education, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China
推荐引用方式 GB/T 7714	Tan Z.,Wang H.,Lu K.,et al. An Observational Based Modeling of the Surface Layer Particulate Nitrate in the North China Plain During Summertime[J],2021,126(18).
APA	Tan Z..,Wang H..,Lu K..,Dong H..,Liu Y..,...&Zhang Y..(2021).An Observational Based Modeling of the Surface Layer Particulate Nitrate in the North China Plain During Summertime.Journal of Geophysical Research: Atmospheres,126(18).
MLA	Tan Z.,et al."An Observational Based Modeling of the Surface Layer Particulate Nitrate in the North China Plain During Summertime".Journal of Geophysical Research: Atmospheres 126.18(2021).