Aerosol–Cloud Interactions: Recent Trends, Current Progress and Future Directions

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

Deadline for manuscript submissions: closed (5 February 2023) | Viewed by 2618

Special Issue Editor


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Guest Editor
Institute for Meteorology, University of Leipzig, Leipzig 04103, Germany
Interests: aerosol–cloud–radiation interactions (aerosol indirect effect); global climate change; satellite observations; climate modeling

Special Issue Information

Dear Colleagues,

Anthropogenic aerosols exert a negative effective radiative forcing that partly offsets warming due to greenhouse gases. The large uncertainty associated with aerosol climatic forcing and the low level of scientific understanding, which limit our ability to accurately predict future climate change, are largely associated with significant differences in the effects of anthropogenic aerosols on clouds (aerosol–cloud interactions, etc.) derived from model simulations and satellite observations. In addition to the gap between observations and simulations, both the weak signal of aerosol–cloud interactions relative to the natural variability of clouds and the satellite retrieval biases of aerosol/cloud properties make it a challenge to identify and quantify aerosol effects on cloud, especially from the observational side. To sidestep the complications raised from these issues, the evident trends in anthropogenic emissions over major industrial region during the past few decades offer an opportunity to detect and confidently assess the effects on cloud properties (e.g., cloud droplet number concentration, liquid water path, and cloud fraction) and the subsequent radiation budget.

In view of above, the journal Atmosphere is hosting this dedicated Special Issue to showcase the most recent findings on regarding global and regional aerosol forcing over the past few decades. This SI is open for submissions of original research studies, reviews, and perspective articles. Comprehensive analysis on the long-term trends of aerosol, cloud, radiation, and other climate-relevant parameters from ground-based and satellite observations as well as climate modeling studies are highly welcome. The encouraged topics are, however, not limited to long-term studies. Papers contributing to garnering insight into the mechanism of aerosol–cloud interactions and the quantification of anthropogenic radiative forcing are also welcome.

Dr. Hailing Jia
Guest Editor

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Keywords

  • aerosol trend
  • cloud trend
  • aerosol–cloud interactions
  • data analysis
  • climate modeling
  • climate response to emission control

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Published Papers (1 paper)

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Research

13 pages, 2655 KiB  
Article
Parameterization of Mean Terminal Velocity of Hydrometeors in Convective Clouds
by Zeyong Zou, Qian Chen, Chunsong Lu, Lei Yang, Qinyao Zou and Boai Sun
Atmosphere 2022, 13(9), 1404; https://doi.org/10.3390/atmos13091404 - 31 Aug 2022
Cited by 1 | Viewed by 2094
Abstract
The relationships between mean terminal velocity and volume mean diameter of different hydrometeors, as well as how they change with different background aerosol concentrations have been investigated with numerical simulations of tropical deep convection from the Weather Forecast and Research Model (WRF), coupled [...] Read more.
The relationships between mean terminal velocity and volume mean diameter of different hydrometeors, as well as how they change with different background aerosol concentrations have been investigated with numerical simulations of tropical deep convection from the Weather Forecast and Research Model (WRF), coupled with spectral bin microphysics. The results showed a positive correlation between either the mass-weighted mean terminal velocity (Vm) or the number-weighted mean terminal velocity (Vn) and the volume-mean diameter (Dv), with a correlation coefficient greater than 0.8. The number concentrations of both large and small hydrometeors increase with enhanced aerosol loading, resulting in increased Vm and decreased Vn. The parameterizations of Vm (Vn) were established under different aerosol conditions. The parameterized Vm (Vn) was then compared with default values used in the model when a fixed shape parameter (gamma distribution) was used in the bulk microphysics, which suggests smaller Vm and larger Vn values from the parameterizations. Moreover, the proposed parameterizations were further applied to the Morrison microphysical scheme for the simulation of a convective cloud. Changes in Vm and Vn as mentioned above directly affect the sedimentation of precipitating hydrometeors, such as raindrops, snow, and graupel, which lead to increased (decreased) mass (number) concentration of hydrometeors. Full article
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