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Atmosphere
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Measurements and Chemistry of Atmospheric Radical
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Measurements and Chemistry of Atmospheric Radical

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 (25 July 2022) | Viewed by 4245

Special Issue Editors

Dr. Haichao Wang

E-Mail Website
Guest Editor
School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou 519082, China
Interests: atmospheric chemistry; instrumentation; reactive nitrogen species; optical spectroscopy
Dr. Zhaofeng Tan

E-Mail Website
Guest Editor
Institute of Energy and Climate Research, IEK-8: Troposphere, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
Interests: hydroxyl radical chemistry; reactive halogen species; laser-induced fluorescence; ozone pollution formation

Special Issue Information

Dear colleagues,

Atmospheric radicals are the driving force of secondary pollution, which creates several environmental issues in urban agglomeration areas and threatens human health. However, the atmospheric oxidation capacity and critical mechanism are different from case to case. Understanding the driving force of pollution formation is an important way to alleviate air pollution. Therefore, knowledge of temporal and spatial distribution and budgets of radicals at global, regional, and local scales is essential to further understand how they cause air pollution.

We are pleased to announce that this Special Issue of Atmosphere will focus on the broad topic of atmospheric radical measurement and chemistry. We invite researchers to submit original research manuscripts in this subject area, which may include instrument development of atmospheric radicals and their precursors, including but not limited to OH, HO2, RO2, NO3, reactive nitrogen species, reactive organic carbon and reactive halogen species, field measurements, and results from model simulations and laboratory experiments. We invite contributions that address the development of atmospheric radical and precursor measurement techniques, field budget studies, estimation of trends and variability, environmental effects, and laboratory dynamics experiments.

Dr. Haichao Wang
Dr. Zhaofeng Tan
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 2400 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

  • atmospheric radical
  • instrumentation
  • budgets
  • precursors
  • field measurement
  • lab studies
  • trace gas detection
  • speciation monitoring
  • optical spectroscopy
  • mass spectroscopy

Published Papers (2 papers)

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Research

13 pages, 1871 KiB  
Article
Investigation of the Gas-Phase Reaction of Nopinone with OH Radicals: Experimental and Theoretical Study
by Gisèle El Dib, Angappan Mano Priya and Senthilkumar Lakshmipathi
Atmosphere 2022, 13(8), 1247; https://doi.org/10.3390/atmos13081247 - 5 Aug 2022
Cited by 3 | Viewed by 1605
Abstract
Monoterpenes are the most essential reactive biogenic volatile organic compounds. Their removal from the atmosphere leads to the formation of oxygenated compounds, such as nopinone (C9H14O), one of the most important first-generation β-pinene oxidation products that play a pivotal [...] Read more.
Monoterpenes are the most essential reactive biogenic volatile organic compounds. Their removal from the atmosphere leads to the formation of oxygenated compounds, such as nopinone (C9H14O), one of the most important first-generation β-pinene oxidation products that play a pivotal role in environmental and biological applications. In this study, experimental and theoretical rate coefficients were determined for the gas-phase reaction of nopinone with hydroxyl radicals (OH). The absolute rate coefficient was measured for the first time using a cryogenically cooled cell along with the pulsed laser photolysis–laser-induced fluorescence technique at 298 K and 7 Torr. The hydrogen abstraction pathways were found by using electronic structure calculations to determine the most favourable H-abstraction position. Pathway 5 (bridgehead position) was more favourable, with a small barrier height of −1.23 kcal/mol. The rate coefficients were calculated based on the canonical variational transition state theory with the small-curvature tunnelling method (CVT/SCT) as a function of temperature. The average experimental rate coefficient (1.74 × 10−11 cm3 molecule−1 s−1) was in good agreement with the theoretical value (2.2 × 10−11 cm3 molecule−1 s−1). Conclusively, the results of this study pave the way to understand the atmospheric chemistry of nopinone with OH radicals. Full article
(This article belongs to the Special Issue Measurements and Chemistry of Atmospheric Radical)
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12 pages, 2547 KiB  
Article
Intercomparison of Ambient Nitrous Acid Measurements in a Shanghai Urban Site
by Zhenni Yang, Meng Wang, Yanping Hou, Yucun Liu, Satheesh Chandran, Ravi Varma, Shengrong Lou and Jun Chen
Atmosphere 2022, 13(2), 329; https://doi.org/10.3390/atmos13020329 - 16 Feb 2022
Cited by 2 | Viewed by 1861
Abstract
Nitrous acid (HONO) is the major source of OH radicals in polluted regions and plays a key role in the nitrogen cycle of the atmosphere. Therefore, accurate measurements of HONO in the atmosphere is important. Long Path Absorption Photometer (LOPAP) is a common [...] Read more.
Nitrous acid (HONO) is the major source of OH radicals in polluted regions and plays a key role in the nitrogen cycle of the atmosphere. Therefore, accurate measurements of HONO in the atmosphere is important. Long Path Absorption Photometer (LOPAP) is a common and highly sensitive method used for ambient HONO measurements. Incoherent Broadband Cavity Enhanced Absorption Spectroscopy (IBBCEAS) is a recent alternative for the detection of HONO with high temporal and spatial resolutions, which has shown a detection limit of 0.76 ppbv at a sampling average of 180 s. In this study, LOPAP and IBBCEAS-HONO instruments were deployed in a Shanghai Urban Site (Shanghai Academy of Environmental Sciences) and simultaneously recorded the data from both instruments for a quantitative intercomparison of the measured atmospheric HONO for four days from 30 December 2017–2 January 2018. The HONO concentration measured by IBBCEAS and LOPAP were well matched. The campaign average concentrations measured by IBBCEAS and LOPAP were 1.28 and 1.20 ppbv, respectively. The intercomparison results demonstrated that both the IBBCEAS-HONO instrument and LOPAP-HONO instrument are suitable for ambient monitoring of HONO in a polluted urban environment. Full article
(This article belongs to the Special Issue Measurements and Chemistry of Atmospheric Radical)
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