Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-16-0220.1 |
The Route to Raindrop Formation in a Shallow Cumulus Cloud Simulated by a Lagrangian Cloud Model | |
Hoffmann, Fabian1; Noh, Yign2; Raasch, Siegfried1 | |
2017-07-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
![]() |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2017 |
卷号 | 74期号:7 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; South Korea |
英文摘要 | The mechanism of raindrop formation in a shallow cumulus cloud is investigated using a Lagrangian cloud model (LCM). The analysis is focused on how and under which conditions a cloud droplet grows to a raindrop by tracking the history of individual Lagrangian droplets. It is found that the rapid collisional growth, leading to raindrop formation, is triggered when single droplets with a radius of 20 mm appear in the region near the cloud top, characterized by large liquid water content, strong turbulence, large mean droplet size, broad drop size distribution (DSD), and high supersaturations. Raindrop formation easily occurs when turbulence-induced collision enhancement (TICE) is considered, with or without any extra broadening of the DSD by another mechanism (such as entrainment and mixing). In contrast, when TICE is not considered, raindrop formation is severely delayed if no other broadening mechanism is active. The reason for the difference is clarified by the additional analysis of idealized box simulations of the collisional growth process for different DSDs in varied turbulent environments. It is found that TICE does not accelerate the timing of the raindrop formation for individual droplets, but it enhances the collisional growth rate significantly afterward by providing a greater number of large droplets for collision. Higher droplet concentrations increase the time for raindrop formation and decrease precipitation but intensify the effect of TICE. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000405556700002 |
WOS关键词 | MICROPHYSICS PARAMETERIZATION ; SIZE DISTRIBUTIONS ; TURBULENCE ; ENTRAINMENT ; AEROSOL ; PRECIPITATION ; COALESCENCE ; SUPERSATURATION ; EFFICIENCIES ; COLLECTION |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | 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/29209 |
专题 | 地球科学 |
作者单位 | 1.Leibniz Univ Hannover, Inst Meteorol & Climatol, Hannover, Germany; 2.Yonsei Univ, Dept Atmospher Sci, Seoul, South Korea |
推荐引用方式 GB/T 7714 | Hoffmann, Fabian,Noh, Yign,Raasch, Siegfried. The Route to Raindrop Formation in a Shallow Cumulus Cloud Simulated by a Lagrangian Cloud Model[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2017,74(7). |
APA | Hoffmann, Fabian,Noh, Yign,&Raasch, Siegfried.(2017).The Route to Raindrop Formation in a Shallow Cumulus Cloud Simulated by a Lagrangian Cloud Model.JOURNAL OF THE ATMOSPHERIC SCIENCES,74(7). |
MLA | Hoffmann, Fabian,et al."The Route to Raindrop Formation in a Shallow Cumulus Cloud Simulated by a Lagrangian Cloud Model".JOURNAL OF THE ATMOSPHERIC SCIENCES 74.7(2017). |
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