Advances in Aerosol–Cloud Interactions: From Microphysical Processes to Earth System Model Evaluation

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

Deadline for manuscript submissions: 25 March 2027 | Viewed by 1241

Editor


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Guest Editor
Faculty of Geographical Science, College of Earth System Science, Beijing Normal University, Beijing 100875, China
Interests: aerosol modeling; climate models; aerosol–cloud interaction
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Special Issue Information

Dear Colleagues,

Aerosol–cloud interactions (ACIs) are a significant topic in climate change research. Aerosols emitted from natural sources and anthropogenic activities serve as the nuclei for liquid or ice water to form cloud droplets. Through microphysical processes, aerosols modify the microphysical and macrophysical  properties of clouds, thereby exerting influences on cloud radiative forcing, precipitation, and severe weather systems. These cloud-mediated aerosol impacts fundamentally change the Earth’s energy budget and water cycle, reshaping the regional and global climate. Nevertheless, owing to the complexity of these processes and limitations in the observational and modeling tools, ACI remains the primary source of uncertainty in climate change projections.

This Special Issue aims to encourage authors to share their latest findings in aerosol–cloud interactions through innovative investigations of the associated microphysical processes. We invite submissions of model-based studies on multiple scales, from large eddy simulations and cloud resolving modeling to Earth System Model development and evaluation. We also welcome contributions from laboratory experiments, in situ measurements, remote sensing studies, and artificial intelligence studies that provide process-level insights to constrain the representation of ACI in models. Through this Special Issue, we seek to advance the fundamental understanding of ACI and reduce uncertainty in climate change projections.

Dr. Tianyi Fan
Guest Editor

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Keywords

  • aerosol–cloud interaction
  • microphysical processes
  • Earth System Models
  • cloud-mediated aerosol impact
  • susceptibility of cloud to aerosols
  • radiative forcing

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Published Papers (1 paper)

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Research

14 pages, 8559 KB  
Article
Opposing Hemispheric Responses of Eastern Pacific Marine Low Clouds to ENSO
by Ehsan Erfani
Atmosphere 2026, 17(7), 668; https://doi.org/10.3390/atmos17070668 - 4 Jul 2026
Viewed by 839
Abstract
Marine low clouds (MLCs) strongly affect Earth’s radiation budget due to their extensive coverage and strong reflection of incoming solar radiation. Despite their important role in the Earth system, the extent and mechanisms of MLC response to climate oscillations are not well understood. [...] Read more.
Marine low clouds (MLCs) strongly affect Earth’s radiation budget due to their extensive coverage and strong reflection of incoming solar radiation. Despite their important role in the Earth system, the extent and mechanisms of MLC response to climate oscillations are not well understood. In this study, the effect of the El Niño–Southern Oscillation (ENSO) on cloud and meteorological properties across the Pacific Ocean is investigated by integrating various satellite observations and reanalysis datasets. The results reveal a pronounced hemispheric asymmetry in the response of subtropical MLCs to ENSO. During El Niño events, the Northeast Pacific exhibits reduced cloud cover and weaker shortwave radiative cooling, while an opposite response is observed over the Southeast Pacific, where cloudiness and radiative cooling are enhanced. These contrasting responses are linked to distinct ENSO-driven meteorological changes between the two hemispheres. Over the Northeast Pacific, El Niño conditions weaken inversion strength and the subtropical high, suppressing MLCs. In contrast, the Southeast Pacific experiences enhanced inversion strength and lower-tropospheric geopotential height during El Niño, which favor MLC development. It is suggested that hemispheric asymmetries in the climatological positions and ENSO-induced responses of the Pacific subtropical highs contribute to the opposite MLC responses between the two hemispheres. These findings highlight the importance of large-scale controls in shaping regional cloud responses to climate variability and provide insights for improving cloud representation in global climate models. Full article
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