Articles | Volume 14, issue 1
https://doi.org/10.5194/gmd-14-259-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-14-259-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Development and technical paper
| 
15 Jan 2021
Development and technical paper |
| 15 Jan 2021
| 15 Jan 2021
Optimization of the sulfate aerosol hygroscopicity parameter in WRF-Chem
Ah-Hyun Kim
Department of Atmospheric Sciences, Yonsei University, Seoul, 03722, Republic of Korea
Seong Soo Yum
CORRESPONDING AUTHOR
Department of Atmospheric Sciences, Yonsei University, Seoul, 03722, Republic of Korea
Dong Yeong Chang
Department of Atmospheric Sciences, Yonsei University, Seoul, 03722, Republic of Korea
Minsu Park
Department of Atmospheric Sciences, Yonsei University, Seoul, 03722, Republic of Korea
Related authors
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Inyeob La, Wojciech W. Grabowski, Yongjoon Kim, Sanggyeom Kim, and Seong Soo Yum
EGUsphere, https://doi.org/10.5194/egusphere-2025-3952, https://doi.org/10.5194/egusphere-2025-3952, 2025
This preprint is open for discussion and under review for Atmospheric Chemistry and Physics (ACP).
Short summary
Short summary
We ask how the amount of aerosol particles shapes cloud structure. Using computer simulations of a laboratory cloud chamber, we varied aerosol levels and tracked droplet growth. When aerosols are few, cloud water increases with height; when many, it becomes almost uniform because vapor is used up near the bottom. These findings clarify when upward motions matter and guide chamber design and better cloud treatment in weather and climate models.
Najin Kim, Seong Soo Yum, Minsu Park, Jong Sung Park, Hye Jung Shin, and Joon Young Ahn
Atmos. Chem. Phys., 20, 11245–11262, https://doi.org/10.5194/acp-20-11245-2020, https://doi.org/10.5194/acp-20-11245-2020, 2020
Short summary
Short summary
Chemical effects on the size-resolved hygroscopicity of urban aerosols were examined based on the KORUS-AQ field campaign data (HTDMA and HR-ToF-AMS). The size-resolved chemical composition data were found to be critical in explaining the size-dependent hygroscopicity, as well as the diurnal variation of κ for small particles. Aerosol mixing state information was associated with the size-resolved chemical composition data to reveal chemical information of different hygroscopicity modes.
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Short summary
A new method to estimate the sulfate aerosol hygroscopicity parameter (κSO4) is suggested that can consider κSO4 for two different sulfate species instead of prescribing a single κSO4 value, as in most previous studies. The new method simulates more realistic cloud droplet concentrations and, thus, a more realistic cloud albedo effect than the original method. The new method is simple and readily applicable to modeling studies investigating sulfate aerosols’ effect in aerosol–cloud interactions.
A new method to estimate the sulfate aerosol hygroscopicity parameter (κSO4) is suggested that...
