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DOI	10.1016/j.atmosres.2020.105367
	Variability of aerosol-cloud interactions induced by different cloud droplet nucleation schemes
	Chang D.Y.; Lelieveld J.; Steil B.; Yoon J.; Yum S.S.; Kim A.-H.
发表日期	2021
ISSN	0169-8095
卷号	250
英文摘要	Aerosol-cloud-climate interactions (ACI) involve the activation of aerosol particles, acting as cloud condensation nuclei (CCN), into cloud droplets and their influence on planetary albedo and climate, which have been incorporated in a general circulation model. CCN activation is calculated using aerosol physical and chemical characteristics in cloud droplet nucleation (CDN) schemes. We applied three different CDN schemes to study the variability of climate predictions from aerosol-cloud interactions using the ECHAM5/MESSy Atmospheric Chemistry-climate model (EMAC). Tuning has been performed for each simulation to achieve net radiative balance at the top of the atmosphere. EMAC generally performs well in simulating climate in comparison to observations. The choice of CDN scheme has a large impact on estimated cloud radiative effects especially in regions with high anthropogenic fine particle pollution. Most pronounced regional variability is found in Europe, India, and China. This is mainly due to differences in the calculated CCN activation of small (Aitken) size particles. Köhler methods, which consider both aerosol physical and chemical properties in the CDN calculations, are recommended for investigating anthropogenic aerosol effects on climate. The tuning process towards radiative balance confines these impacts and can be regarded as important as the choice of CDN scheme. Regional variability is also found in Central Africa and South America, related to the high sensitivity of cloud optical parameter tuning as well as differences among CDNC. The tunable parameters affect the water budget and cloud optical properties, and the sensitivity of CDN. The overall variability of simulated climate, induced by different CDN schemes, is found to be less than 27%, which can be restricted by parameter tuning. In general, tuning tends to improve the general performance of the climate model, but not necessarily for all variables. We find that it is important to consider the regional sensitivity of various CCN activation and tuning parameters to optimally simulate climate. © 2020 Elsevier B.V.
英文关键词	Aerosol; Aerosol-cloud interactions; CCN activation; Cloud; EMAC atmospheric chemistry model; Tuning parameters
语种	英语
scopus关键词	Aerosols; Atmospheric chemistry; Budget control; Chemical activation; Crystallization; Drops; Nucleation; Optical properties; Aerosol-cloud interaction; Chemistry-climate models; Cloud condensation nuclei; Cloud optical properties; Cloud radiative effects; General circulation model; Physical and chemical characteristics; Physical and chemical properties; Climate models; aerosol; atmospheric chemistry; climate modeling; climate prediction; cloud condensation nucleus; cloud droplet; cloud radiative forcing; comparative study; nucleation; physicochemical property; China; Europe; India
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162023
作者单位	Atmospheric Chemistry Department, Max-Planck Institute for Chemistry, P. O. Box 3060, Mainz, 55020, Germany; Atmospheric sciences, Yonsei University, Seoul, South Korea; The Cyprus Institute, P. O. Box 27456, Nicosia, 1645, Cyprus; Climate and Air Quality Research Department, National Institute of Environmental Research, Incheon, South Korea
推荐引用方式 GB/T 7714	Chang D.Y.,Lelieveld J.,Steil B.,et al. Variability of aerosol-cloud interactions induced by different cloud droplet nucleation schemes[J],2021,250.
APA	Chang D.Y.,Lelieveld J.,Steil B.,Yoon J.,Yum S.S.,&Kim A.-H..(2021).Variability of aerosol-cloud interactions induced by different cloud droplet nucleation schemes.Atmospheric Research,250.
MLA	Chang D.Y.,et al."Variability of aerosol-cloud interactions induced by different cloud droplet nucleation schemes".Atmospheric Research 250(2021).