Effects of model resolution and parameterizations on the simulations of clouds, precipitation, and their interactions with aerosols
- 주제(기타) Meteorology & Atmospheric Sciences
- 설명문(일반) [Lee, Seoung Soo; Li, Zhanqing; Zhang, Yuwei; Mok, Jungbin] Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20742 USA; [Yoo, Hyelim] Earth Resources Technol Inc, NOAA, College Pk, MD USA; [Kim, Seungbum] Korea Meteorol Adm, Weather Impact Forecasts Team, Seoul, South Korea; [Kim, Byung-Gon] Gangneung Wonju Natl Univ, Dept Atmospher Environm Sci, Kangnung, Gang Won Do, South Korea; [Choi, Yong-Sang] Ewha Womans Univ, Dept Environm Sci & Engn, Seoul, South Korea; [Um, Junshik] Univ Oklahoma, Cooperat Inst Mesoscale Meteorol Studies, Norman, OK 73019 USA; [Choi, Kyoung Ock] Yonsei Univ, Cloud Phys Lab, Seoul, South Korea; [Dong, Danhong] Chinese Acad Sci, State Key Lab Numer Modeling Atmospher Sci & Geop, Inst Atmospher Phys, Beijing, Peoples R China
- 등재 SCIE, SCOPUS
- 발행기관 COPERNICUS GESELLSCHAFT MBH
- 발행년도 2018
- URI http://www.dcollection.net/handler/ewha/000000150052
- 본문언어 영어
- Published As http://dx.doi.org/10.5194/acp-18-13-2018
초록/요약
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.
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