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Atmosphere
Special Issues
Aerosols: Direct, Semi-direct, and Indirect Radiative Effects
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Aerosols: Direct, Semi-direct, and Indirect Radiative Effects

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

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 3094

Special Issue Editors

Dr. Wenhao Xue

E-Mail Website
Guest Editor
School of Economics, Qingdao University, Qingdao 266071, China
Interests: aerosol; air pollution; environmental economy; fine particulate matter; ozone; big data
Dr. Jing Zhang

E-Mail Website
Guest Editor
College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, China
Interests: atmospheric physics and atmospheric environment; aerosol-cloud-radiation interaction; atmosphere-land surface interaction
Dr. Jing Wei

E-Mail Website
Guest Editor
Department of Atmospheric and Oceanic Science, Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD 20740, USA
Interests: remote sensing; artificial intelligence; big data; air pollution; aerosol; particulate matter; trace gas; cloud
Special Issues, Collections and Topics in MDPI journals
Dr. Yulu Tian

E-Mail Website
Guest Editor
College of Urban and Environmental Sciences, Northwest University, Xi’an 710127, China
Interests: air quality; atmospheric pollution; environmental management

Special Issue Information

Dear Colleagues,

Atmospheric aerosols can affect solar radiation directly through absorption and diffusion. In addition, they can indirectly affect solar radiation by altering cloud cover. A comprehensive and accurate understanding of the radiative effects of aerosols is not only conducive to addressing global climate change but is also powerful for the realization of global carbon neutralization and the mitigation of global warming. In recent years, with the improvements in observation technology, the development of model simulations, and the optimization of statistical methods, research pertaining to the radiative effects of aerosols has been widely conducted at the theoretical and applied levels. Nevertheless, there are still many complex problems to be solved. Therefore, novel and insightful research are needed to better understand the mechanism and influence of the radiative effects of aerosols.

This Special Issue welcomes all manuscripts that present novel and advanced scientific contributions in the mechanism analysis and application research of the radiative effects of aerosols, including, but not limited to, the following:

- Characteristics of direct, semi-direct, and indirect radiation effects;

- Observation, estimation, and model simulations of aerosol radiative effects;

- Cause analysis of the properties of the radiative effects of aerosols;

- Impacts of the radiative effects of aerosols on terrestrial and marine ecosystems;

- Response of human health to the radiative effects of aerosols;

- Economic effects of the radiative effects of aerosols.

Dr. Wenhao Xue
Dr. Jing Zhang
Dr. Jing Wei
Dr. Yulu Tian

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

  • aerosols
  • direct, semi-direct, and indirect radiative effects
  • direct and diffuse radiation
  • modeling simulations
  • remote sensing
  • ground-based measurements
  • climate change

Published Papers (2 papers)

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Research

10 pages, 2128 KiB  
Article
On the Trend in Below-Cloud Solar Irradiance in The Netherlands versus That in Aerosol Sulfate Concentration
by Suzanne Crumeyrolle, Andrey Khlystov and Harry Ten Brink
Atmosphere 2022, 13(12), 2037; https://doi.org/10.3390/atmos13122037 - 04 Dec 2022
Viewed by 996
Abstract
The below-cloud irradiance in The Netherlands increased by over 10 Wm−2 in the past half century. It was hypothesized that this could be due to a decrease in the aerosol serving as cloud condensation nuclei, on which the cloud droplets form, in [...] Read more.
The below-cloud irradiance in The Netherlands increased by over 10 Wm−2 in the past half century. It was hypothesized that this could be due to a decrease in the aerosol serving as cloud condensation nuclei, on which the cloud droplets form, in the following way. With unchanged macrophysics, clouds with a lower number of droplets are less reflective, in other words, they transmit more solar radiation. This hypothesis cannot be substantiated with data because of a generic absence of long-term information on cloud droplet number concentrations (CDNCs) worldwide. To assess the historic trend in CDNC, we used the Boucher and Lohmann (B&L) empirical relationship between CDNC and the mass concentration of the water-attracting hygroscopic aerosol components. The B&L parameterization was tested and validated with observations from the CHIEF cloud chamber, in which the formation of marine stratocumulus, the most frequent cloud type in The Netherlands, is simulated. This study will focus on summer periods because the irradiance governs the yearly average at this latitude. The summer trend of sulfate, the most dominant hygroscopic component of observed aerosol mass concentration, was analyzed with EBAS data from 1972 onwards. The average summer CDNCs were then calculated via the B&L parameterization, showing an upper limit of 380 cm−3 in the 1970s and decreasing to around 200 cm−3 in the 2010s. The associated increase in transmission for thin marine stratocumulus without overlying clouds would be, at most, 3.5 W m−2. Unobstructed stratocumuli occur only part of the time, and the change in irradiance based on the reduction in cloud droplet number is certainly small in comparison to the empirically derived trend of 10 W m−2. Full article
(This article belongs to the Special Issue Aerosols: Direct, Semi-direct, and Indirect Radiative Effects)
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17 pages, 3278 KiB  
Article
Impact of Cloud Condensation Nuclei Reduction on Cloud Characteristics and Solar Radiation during COVID-19 Lockdown 2020 in Moscow
by Julia Shuvalova, Natalia Chubarova and Marina Shatunova
Atmosphere 2022, 13(10), 1710; https://doi.org/10.3390/atmos13101710 - 18 Oct 2022
Cited by 6 | Viewed by 1228
Abstract
We used MODIS observations to retrieve number concentration of cloud droplets (Nd) at cloud lower boundary during spring 2018–2020 for the Moscow region. Looking through the similar synoptic situations of the northern clear air advection, we obtained Nd within the [...] Read more.
We used MODIS observations to retrieve number concentration of cloud droplets (Nd) at cloud lower boundary during spring 2018–2020 for the Moscow region. Looking through the similar synoptic situations of the northern clear air advection, we obtained Nd within the limits of 200–300 cm−3. During the lockdown period, with similar northern advection conditions, the reduction of Nd on 40–50 cm−3 (or 14–16%), with the increase in droplet effective radius by 8 ± 1% and cloud optical thickness reduction by 5 ± 2%, was observed in contrast to the values in typical conditions in 2018–2019. We used these values for setting up corresponding parameters in numerical simulations with the COSMO-Ru model. According to the numerical experiments, we showed that the observed reduction in cloud droplet concentration by 50 cm−3 provides a 5–9 W/m2 (or 9–11%) increase in global irradiance at ground in overcast cloud conditions with LWP = 200–400 g/m2. Full article
(This article belongs to the Special Issue Aerosols: Direct, Semi-direct, and Indirect Radiative Effects)
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