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Toxics
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The Evolution of Atmospheric Composition and Its Impact on Human...
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The Evolution of Atmospheric Composition and Its Impact on Human Health and Ecosystem in Asia

A special issue of Toxics (ISSN 2305-6304). This special issue belongs to the section "Air Pollution and Health".

Deadline for manuscript submissions: 31 December 2024 | Viewed by 1778

Special Issue Editors

Prof. Dr. Gen Zhang

E-Mail Website
Guest Editor
Chinese Academy of Meteorological Sciences, Beijing, China
Interests: regional photochemical pollution; trace-level gas observation and modeling; greenhouse gases
Dr. Yan Yan

E-Mail Website
Guest Editor
Nation Climate Center, China Meteorological Administration, Beijing, China
Interests: atmospheric boundary layer climatology; regional pollution and global change
Dr. Kunpeng Zang

E-Mail Website
Guest Editor
Zhejiang Carbon Neutral Innovation Institute, Zhejiang University of Technology, Hangzhou 310014, China
Interests: greenhouse gases; atmospheric reactive compositions; observation techniques and instruments; marine carbon cycle; air–sea interaction

Special Issue Information

Dear Colleagues,

The atmospheric composition, including trace gases and aerosols in high concentrations, not only affects the regional atmospheric environment, but also threatens human health and the ecosystem. Multiple national governments take actions to protect the ozone layer and mitigate air pollution under a series of international agreements, such as the Montreal Protocol and Pairs Agreement. Asia, as an intensive source of air pollution, has continuously received increasing attention. In addition, air pollution in Asia has worldwide consequences through long-range transport, climate change, and its interaction with the other regions. Thus, this Special Issue focuses on changes in atmospheric trace gases and aerosols in terms of their emissions, composition and physicochemical properties, as well as their consequent impacts on human, the climate and the ecosystem in Asia under the latest international agreement. Specifically, manuscripts related to novel detection methods, field measurements, and improved numerical simulations for these species are especially welcome.

Prof. Dr. Gen Zhang
Dr. Yan Yan
Dr. Kunpeng Zang
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. Toxics 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 2600 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 compositon
  • air pollution
  • health risks
  • exposure
  • sources

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Published Papers (1 paper)

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Research

23 pages, 6947 KiB  
Article
The Impact of Agroecosystems on Nitrous Acid (HONO) Emissions during Spring and Autumn in the North China Plain
by Jianhui Zeng, Wanyun Xu, Ye Kuang, Weiqi Xu, Chang Liu, Gen Zhang, Huarong Zhao, Sanxue Ren, Guangsheng Zhou and Xiaobin Xu
Toxics 2024, 12(5), 331; https://doi.org/10.3390/toxics12050331 - 30 Apr 2024
Viewed by 1456
Abstract
Solar radiation triggers atmospheric nitrous acid (HONO) photolysis, producing OH radicals, thereby accelerating photochemical reactions, leading to severe secondary pollution formation. Missing daytime sources were detected in the extensive HONO budget studies carried out in the past. In the rural North China Plain, [...] Read more.
Solar radiation triggers atmospheric nitrous acid (HONO) photolysis, producing OH radicals, thereby accelerating photochemical reactions, leading to severe secondary pollution formation. Missing daytime sources were detected in the extensive HONO budget studies carried out in the past. In the rural North China Plain, some studies attributed those to soil emissions and more recent studies to dew evaporation. To investigate the contributions of these two processes to HONO temporal variations and unknown production rates in rural areas, HONO and related field observations obtained at the Gucheng Agricultural and Ecological Meteorological Station during spring and autumn were thoroughly analyzed. Morning peaks in HONO frequently occurred simultaneously with those of ammonia (NH3) and water vapor both during spring and autumn, which were mostly caused by dew and guttation water evaporation. In spring, the unknown HONO production rate revealed pronounced afternoon peaks exceeding those in the morning. In autumn, however, the afternoon peak was barely detectable compared to the morning peak. The unknown afternoon HONO production rates were attributed to soil emissions due to their good relationship to soil temperatures, while NH3 soil emissions were not as distinctive as dew emissions. Overall, the relative daytime contribution of dew emissions was higher during autumn, while soil emissions dominated during spring. Nevertheless, dew emission remained the most dominant contributor to morning time HONO emissions in both seasons, thus being responsible for the initiation of daytime OH radical formation and activation of photochemical reactions, while soil emissions further maintained HONO and associated OH radial formation rates at a high level, especially during spring. Future studies need to thoroughly investigate the influencing factors of dew and soil emissions and establish their relationship to HONO emission rates, form reasonable parameterizations for regional and global models, and improve current underestimations in modeled atmospheric oxidation capacity. Full article
(This article belongs to the Special Issue The Evolution of Atmospheric Composition and Its Impact on Human Health and Ecosystem in Asia)
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