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Effects of model resolution and parameterizations on the simulations of clouds, precipitation, and their interactions with aerosols

Title
Effects of model resolution and parameterizations on the simulations of clouds, precipitation, and their interactions with aerosols
Authors
Lee, Seoung SooLi, ZhanqingZhang, YuweiYoo, HyelimKim, SeungbumKim, Byung-GonChoi, Yong-SangMok, JungbinUm, JunshikChoi, Kyoung OckDong, Danhong
Ewha Authors
최용상
SCOPUS Author ID
최용상scopus
Issue Date
2018
Journal Title
ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN
1680-7324JCR Link1680-7316JCR Link
Citation
vol. 18, no. 1, pp. 13 - 29
Publisher
COPERNICUS GESELLSCHAFT MBH
Indexed
SCOPUS; SCI; SCIE WOS scopus
Abstract
This study investigates the roles played by model resolution and microphysics parameterizations in the wellknown uncertainties or errors in simulations of clouds, precipitation, and their interactions with aerosols by the numerical weather prediction (NWP) models. For this investigation, we used cloud-system-resolving model (CSRM) simulations as benchmark simulations that adopt high-resolution and full-fledged microphysical processes. These simulations were evaluated against observations, and this evaluation demonstrated that the CSRM simulations can function as benchmark simulations. Comparisons between the CSRM simulations and the simulations at the coarse resolutions that are generally adopted by current NWP models indicate that the use of coarse resolutions as in the NWP models can lower not only updrafts and other cloud variables (e.g., cloud mass, condensation, deposition, and evaporation) but also their sensitivity to increasing aerosol concentration. The parameterization of the saturation process plays an important role in the sensitivity of cloud variables to aerosol concentrations. while the parameterization of the sedimentation process has a substantial impact on how cloud variables are distributed vertically. The variation in cloud variables with resolution is much greater than what happens with varying microphysics parameterizations, which suggests that the uncertainties in the NWP simulations are associated with resolution much more than microphysics parameterizations.
DOI
10.5194/acp-18-13-2018
Appears in Collections:
엘텍공과대학 > 환경공학전공 > Journal papers
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