Observation and Properties of Atmospheric Aerosol

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

Deadline for manuscript submissions: 30 November 2025 | Viewed by 882

Special Issue Editors


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Guest Editor
Institute of Atmospheric Sciences and Climate (ISAC), National Research Council (CNR), Str. Prv. Lecce-Monteroni km 1.2, 73100 Lecce, Italy
Interests: aerosol; atmospheric pollution; microphysical properties; chemical properties; optical properties; aerosol mixing state; aerosol ageing; aerosol in situ measurements; aerosol remote sensing; analytical microscopy; aerosol single-particle analysis; aerosol chemical composition; elemental composition of aerosol; aerosol typing; modeling of aerosol optical properties; aerosol sampling techniques; aerosol sources and apportionment; long-range transport of aerosols

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Guest Editor
Department of Physics, Gheorghe Asachi Technical University of Iași, 700050 Iași, Romania
Interests: remote sensing techniques for environmental monitoring; long-range transport of aerosols; pollution; environmental engineering; atmospheric pollution; analytical microscopy; nanoscale imaging and spectroscopy; optical atmosphere; spectroscopy and lasers; physics
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Special Issue Information

Dear Colleagues,

Atmospheric aerosol microphysical, microchemical, and optical properties are the core characteristics for understanding their role in assessing air pollution, radiative forcing, and health impacts. Improved aerosol observations and characterization are currently achieved by long-term monitoring and measurement campaigns, using in situ, remote sensing from ground-based methods and satellites, as well as laboratory off-line analysis techniques. Monitoring of aerosols and their properties is carried out at fixed locations via air quality and research networks, through mobile measurements with transportable stations, and via measurements during movement involving instrumentation boarding vehicles, scientific flights with UAVs as well as manned aircraft, and research vessels.

For this purpose, we are pleased to announce a Special Issue with a focus on observations and properties of atmospheric aerosol, involving topics for characterizing atmospheric aerosol properties, such as size, shape, mixing state, chemical composition, and optical properties, and their source and ageing mechanisms during transport, achieved by observations during long-term and measurement campaigns, via fixed or mobile measurements.

The following areas are of interest, but are not limited to them:

  • Observations and properties of atmospheric aerosol via long-term monitoring and campaign measurements;
  • Aerosol microphysical properties, chemical composition, aerosol typing, and source apportionment;
  • On-line measurements and off-line aerosol single-particle or bulk chemical analysis;
  • Aerosol morphology (size, shape, and mixing state), ageing, and effects on optical properties, radiative forcing, climate models, and human health;
  • In situ, remote sensing, and off-line laboratory analyses of aerosol properties, as well as their synergy and the intercomparison of methods;
  • Air quality monitoring and air pollution studies via fixed or mobile stations;
  • Chamber studies of aerosol properties;
  • Applications of effective-cost sensors for observations of atmospheric aerosol properties;
  • Machine learning techniques for atmospheric aerosol property classification and typing.

We are eager to receive your submission articles for this new Special Issue.

Dr. Florin Unga
Dr. Marius M. Cazacu
Guest Editors

Manuscript Submission Information

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Keywords

  • atmospheric aerosol and air pollution
  • microphysical properties
  • chemical composition
  • optical properties
  • aerosol typing and source apportionment
  • mixing state
  • long-term measurements
  • campaign measurements
  • mobile measurements
  • machine learning

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Published Papers (1 paper)

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Research

24 pages, 9545 KiB  
Article
Analysis of the PM2.5/PM10 Ratio in Three Urban Areas of Northeastern Romania
by Liliana Drăgoi (Oniu), Marius-Mihai Cazacu and Iuliana-Gabriela Breabăn
Atmosphere 2025, 16(6), 720; https://doi.org/10.3390/atmos16060720 - 13 Jun 2025
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Abstract
The study was conducted in Suceava, Iasi, and Botosani, three geographically different cities in Romania with increasing PM10 concentrations, especially during the colder months. In order to assess the contributions of PM2.5 and PM10, the PM2.5/PM10 ratios were analyzed for the period 2019–2023. [...] Read more.
The study was conducted in Suceava, Iasi, and Botosani, three geographically different cities in Romania with increasing PM10 concentrations, especially during the colder months. In order to assess the contributions of PM2.5 and PM10, the PM2.5/PM10 ratios were analyzed for the period 2019–2023. The results showed a downward trend in PM10 and PM2.5 concentrations, with a more significant decrease observed for PM2.5. However, although the annual PM2.5/PM10 ratios also decreased, their decrease did not follow the same pattern as the decrease in PM10 and PM2.5 concentrations. The annual PM2.5/PM10 ratios varied from 0.48 to 0.61 in Botosani, from 0.54 to 0.72 in Iasi and from 0.60 to 0.71 in Suceava. The seasonal analysis of the data showed that the highest ratios were observed in winter in Suceava, where wood is also used for residential heating. The frequency distribution of the ratios was examined for each season to determine the nature of the emissions: natural or anthropogenic. The analysis of the spatial variation of the PM2.5/PM10 ratio showed that the greatest differences occurred between Iasi and Botosani as indicated by a coefficient of divergence (COD) value of 0.236. Furthermore, the temperature was used to analyze its potential relationships in relation with the PM2.5/PM10 ratio. Full article
(This article belongs to the Special Issue Observation and Properties of Atmospheric Aerosol)
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