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Atmosphere
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Atmospheric Deposition: New Insights into an Important Self-Cleaning Process in...
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Atmospheric Deposition: New Insights into an Important Self-Cleaning Process in Atmosphere with Environmental Consequences

A special issue of Atmosphere (ISSN 2073-4433). This special issue belongs to the section "Air Quality".

Deadline for manuscript submissions: closed (23 January 2024) | Viewed by 1134

Special Issue Editor

Dr. Iva Hůnová

E-Mail Website
Guest Editor
Czech Hydrometeorological Institute, Na Šabatce 17, 143 06 Prague, Czech Republic
Interests: atmosphere; ambient air quality; atmospheric deposition; ground-level ozone; long-term trends and spatial patterns; air pollution assessment
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Atmospheric deposition is an important process contributing to the self-cleaning of the atmosphere and introducing not only nutrients but also pollutants into the ecosystems and environment. This indeed crucial process involves different mechanisms influenced by numerous factors, such as the capacity and spatial distribution of both natural and anthropogenic emission sources, meteorological processes, atmospheric chemistry, land use and ecosystems. It occurs via wet or dry pathways, the first one being an episodic process related to rain and snow events, whereas the latter one is a continuous direct transfer of gases and particles to the Earth´s surface. Occult deposition, related to fog and rime, is mostly neglected due to the lack of data, though it is known to contribute substantially to the total deposition fluxes in certain areas, such as mountain forests.

The infamous acid deposition, a result of the long-range transport of air pollutants such as sulphur dioxide and nitrogen oxides from highly polluted emission source areas, resulted in vast damages both in terrestrial and water ecosystems in the fairly clean Scandinavia as well as in the Northeastern US in the 1970s. Due to stringent emission reductions the acid deposition has substantially improved since in Europe and the US; however, it has become a challenge in other parts of the world, such as Southeast Asia, due to its fast growing population and related activities.

This Special Issue seeks manuscripts presenting new insights into both wet and dry deposition pathways and processes from different world regions and environments. We invite you to contribute articles by reporting on observation-based and modelling studies, related not only to wet and dry, but to occult deposition as well. Contributions elucidating the deposition of major ions and trace elements, both inorganic and organic species, are encouraged. Studies considering the role of on-going climate change in atmospheric deposition processes are gladly accepted. Both original research studies and review articles are welcome.

Dr. Iva Hůnová
Guest Editor

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

  • wet deposition
  • dry deposition
  • occult deposition
  • washout
  • rainout
  • gases
  • particles

Published Papers (1 paper)

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Research

17 pages, 5028 KiB  
Article
Experimental Study of Particle Transport and Deposition Distribution over Complex Terrains Based on Spherical Alumina
by Yusheng Liu, Jie Zhang, Hongchao Dun, Kang Gong, Li Shi and Ning Huang
Atmosphere 2023, 14(12), 1756; https://doi.org/10.3390/atmos14121756 - 29 Nov 2023
Viewed by 816
Abstract
The transport and deposition of atmospheric particulate matter have attracted significant attention recently due to the increasing frequency of extreme disaster events, such as dust storms, volcanic eruptions, and extensive forest fires. The size distribution of the transported material and the conditions of [...] Read more.
The transport and deposition of atmospheric particulate matter have attracted significant attention recently due to the increasing frequency of extreme disaster events, such as dust storms, volcanic eruptions, and extensive forest fires. The size distribution of the transported material and the conditions of the land–air interface are dominant factors in comprehending the detrimental potential of atmospheric particulate matter. However, it is still a challenge to understand the mechanism of dust deposition, especially over complex terrain. In an effort to investigate the deposition characteristics of particles over complex terrain, a series of experiments were conducted in a multifunctional environmental wind tunnel. The results show that the wind speed directly above the top of the mild slope model is significantly greater than that in the steep slope model, which indicates that a steep slope has a greater blocking effect on wind fields. At low wind speeds, the average wind speed at the top of the mild slope model is 17.8% higher than that at the top of the steep slope model, and at high wind speeds the average wind speed at the top of the mild slope model is 8.6% higher than that at the top of the steep slope model. The influence trend of the steep slope model and the combination model is basically the same, with both decreasing first and then increasing with the direction of wind velocity. The amount of surface deposition is greatly affected by the location of the feeding point and the microscale characteristics of the surface. In the steep slope model, the deposition is mainly distributed on the windward side, while the leeward side has a small amount of deposition. In the mild slope model, particles are deposited not only on the windward side, but also on the leeward side. The average rate of decline in deposition flux in the steep slope model is 88.4% and 75.1% in the mild slope model. The use of the combination model reduces the particle concentration at the back end compared with the single model. In three different models, the deposition on the windward side was shown to be significantly greater than that on the leeward side of the model. Our work increases understanding of the deposition of coarse dust particles over complex terrain and provides basic data for improving the accuracy of large-region particle transport and deposition simulations. Full article
(This article belongs to the Special Issue Atmospheric Deposition: New Insights into an Important Self-Cleaning Process in Atmosphere with Environmental Consequences)
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