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Atmosphere
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Measurements and Analysis of Atmospheric Oxidation: Recent Trends, Current Progress...
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Special Issue "Measurements and Analysis of Atmospheric Oxidation: Recent Trends, Current Progress and Future Directions"

A special issue of Atmosphere (ISSN 2073-4433). This special issue belongs to the section "Atmospheric Techniques, Instruments, and Modeling".

Deadline for manuscript submissions: closed (15 February 2023) | Viewed by 1556

Special Issue Editors

Dr. Renzhi Hu

E-Mail Website
Guest Editor
Key Laboratory of Environment Optics and Technology, Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
Interests: atmospheric chemistry; laser-induced fluorescence; ozone pollution; reactive nitrogen species
Dr. Shengrong Lou
E-Mail Website
Guest Editor
State Environmental Protection Key Laboratory of Formation and Prevention of the Urban Air Pollution Complex, Shanghai Academy of Environmental Sciences, Shanghai 200233, China
Interests: atmospheric photochemistry; trace gas measurement techniques; ozone pollution control;

Special Issue Information

Dear Colleagues,

The deterioration of air quality in urban areas has received increasing concerns among government agencies and scientific communities. Tropospheric oxidation is an essential driving force of complex air pollution. The oxidation of primary pollutants by OH, O3, NO3 and reactive halogen species controls the lifetime of primary pollutants on local to global scales, which is, in turn, responsible for secondary product formation, such as asozone and fine particulate matter. A thorough measurement and analysis of atmospheric oxidation processes is helpful to understand the causes of urban air pollution and shed light on further control policies.

Through this Special Issue of Atmosphere, we invite original research manuscripts (including review articles) with regard to a variety of issues relevant to the measurement and analysis of atmospheric oxidation. Topics include but are not limited to instrument development on ozone, PM2.5 and its precursors (OH, HO2, RO2, NO3, reactive nitrogen species, volatile organic compounds and reactive halogen species), field measurements reports and air quality model simulations study in urban, rural, and background environments, smog chamber simulation and laboratory dynamics experiments, Artificial Intelligence and machine learning application in atmospheric oxidation research, and policy-related studies for pollution control.

Dr. Renzhi Hu
Dr. Shengrong Lou
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Atmosphere is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2000 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • tropospheric oxidation
  • secondary pollutants
  • field measurements
  • air quality model
  • ozone sensitivity
  • precursors
  • trace gas detection
  • instrumentation

Published Papers (2 papers)

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Article
Compact, Fast Cavity Ring-Down Spectroscopy Monitor for Simultaneous Measurement of Ozone and Nitrogen Dioxide in the Atmosphere
by
Xiaoyan Liu
,
Zhijing Hu
,
Hehe Tang
,
Huijie Xue
,
Yang Chen
and
Renzhi Hu
Atmosphere 2022, 13(12), 2106; https://doi.org/10.3390/atmos13122106 - 15 Dec 2022
Viewed by 488
Abstract
A sensitive, compact detector for the simultaneous measurement of O3 and NO2 is presented in this work. There are two channels in the detector, namely the Ox channel and the NO2 channel. In the presence of excess NO, ambient [...] Read more.
A sensitive, compact detector for the simultaneous measurement of O3 and NO2 is presented in this work. There are two channels in the detector, namely the Ox channel and the NO2 channel. In the presence of excess NO, ambient O3 is converted to NO2 in the Ox measurement channel. In both channels, NO2 is directly detected via cavity ring-down spectroscopy (CRDS) at 409 nm. At a 10 s integration time, the Ox and NO2 channels have a 1σ precision of 14.5 and 13.5 pptv, respectively. The Allan deviation plot shows that the optimal sensitivity of O3 and NO2 occurs at an integration time of ~60 s, with values of 10.2 and 8.5 pptv, respectively. The accuracy is 6% for the O3 channel and 5% for the NO2 channel, and the largest uncertainty comes from the effective NO2 absorption cross-section. Intercomparison of the NO2 detection between the NO2 and Ox channels shows good agreement within their uncertainties, with an absolute shift of 0.31 ppbv, a correlation coefficient of R2 = 0.99 and a slope of 0.98. Further intercomparison for ambient O3 measurement between the O3/NO2-CRDS developed in this work and a commercial UV O3 monitor also shows excellent agreement, with linear regression slopes close to unity and an R2 value of 0.99 for 1 min averaged data. The system was deployed to measure O3 and NO2 concentrations in Hefei, China, and the observation results show obvious diurnal variation characteristics. The successful deployment of the system has demonstrated that the instrument can provide a new method for retrieving fast variations in ambient O3 and NO2. Full article
(This article belongs to the Special Issue Measurements and Analysis of Atmospheric Oxidation: Recent Trends, Current Progress and Future Directions)
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Article
Reactivity and Loss Mechanisms of NO3 and N2O5 at a Rural Site on the North China Plain
by
Dan Wang
,
Pinhua Xie
,
Renzhi Hu
,
Zhiyan Li
,
Hao Chen
and
Huawei Jin
Atmosphere 2022, 13(8), 1268; https://doi.org/10.3390/atmos13081268 - 10 Aug 2022
Viewed by 658
Abstract
NO3, NO2, O3, and relevant parameters were measured at a rural site on the North China Plain during June 2014. During the campaign, the average concentrations of NO3 and N2O5 were 4.8 ± [...] Read more.
NO3, NO2, O3, and relevant parameters were measured at a rural site on the North China Plain during June 2014. During the campaign, the average concentrations of NO3 and N2O5 were 4.8 ± 3.3 pptv and 30.5 ± 35.4 pptv, respectively. The average NO3 production rate was 1.03 ± 0.48 ppbvh−1, and the steady-state lifetimes of NO3 and N2O5 were 26 s and 162 s, respectively, indicating that the NOx chemistry in the rural site during summer was active. The uptake coefficient range of N2O5 was 0.023 to 0.118, with an average value of 0.062 ± 0.035. Meanwhile, the fitting for kNO3 was 0.013 ± 0.016 s−1, corresponding to the shorter NO3 lifetime below 1 min. The results show that the indirect loss pathways caused by the heterogonous uptake of N2O5 contributed 64–90% of the overall NO3 loss, with an average of 81%, suggesting that the N2O5 heterogeneous reaction dominated the nocturnal NOx loss over this region. Full article
(This article belongs to the Special Issue Measurements and Analysis of Atmospheric Oxidation: Recent Trends, Current Progress and Future Directions)
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