Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-19-2933-2019 |
Technical note: The role of evolving surface tension in the formation of cloud droplets | |
Davies, James F.1; Zuend, Andreas2; Wilson, Kevin R.3 | |
2019-03-07 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2019 |
卷号 | 19期号:5页码:2933-2946 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Canada |
英文摘要 | The role of surface tension (sigma) in cloud droplet activation has long been ambiguous. Recent studies have reported observations attributed to the effects of an evolving surface tension in the activation process. However, the adoption of a surface-mediated activation mechanism has been slow and many studies continue to neglect the composition dependence of aerosol-droplet surface tension, using instead a value equal to the surface tension of pure water (sigma(w)). In this technical note, we clearly describe the fundamental role of surface tension in the activation of multicomponent aerosol particles into cloud droplets. It is demonstrated that the effects of surface tension in the activation process depend primarily on the evolution of surface tension with droplet size, typically varying in the range 0.5 sigma(w)less than or similar to sigma <=sigma(w) due to the partitioning of organic species with a high surface affinity. We go on to report some recent laboratory observations that exhibit behavior that may be associated with surface tension effects and propose a measurement coordinate that will allow surface tension effects to be better identified using standard atmospheric measurement techniques. Unfortunately, interpreting observations using theory based on surface film and liquid-liquid phase separation models remains a challenge. Our findings highlight the need for experimental measurements that better reveal the role of composition-dependent surface tensions, critical for advancing predictive theories and parameterizations of cloud droplet activation. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000460622900001 |
WOS关键词 | SINGLE-PARAMETER REPRESENTATION ; CONDENSATION NUCLEUS ACTIVITY ; HYGROSCOPIC GROWTH ; ORGANIC-COMPOUNDS ; THERMODYNAMIC MODEL ; CCN ACTIVITY ; AEROSOL-PARTICLES ; ACTIVATION ; ACID ; MIXTURES |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/28426 |
专题 | 地球科学 |
作者单位 | 1.Univ Calif Riverside, Dept Chem, Riverside, CA 92521 USA; 2.McGill Univ, Dept Atmospher & Ocean Sci, Montreal, PQ, Canada; 3.Lawrence Berkeley Natl Lab, Chem Sci Div, Berkeley, CA USA |
推荐引用方式 GB/T 7714 | Davies, James F.,Zuend, Andreas,Wilson, Kevin R.. Technical note: The role of evolving surface tension in the formation of cloud droplets[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2019,19(5):2933-2946. |
APA | Davies, James F.,Zuend, Andreas,&Wilson, Kevin R..(2019).Technical note: The role of evolving surface tension in the formation of cloud droplets.ATMOSPHERIC CHEMISTRY AND PHYSICS,19(5),2933-2946. |
MLA | Davies, James F.,et al."Technical note: The role of evolving surface tension in the formation of cloud droplets".ATMOSPHERIC CHEMISTRY AND PHYSICS 19.5(2019):2933-2946. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论