Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019JD031073 |
Aerosol-Cloud Interactions in Trade Wind Cumulus Clouds and the Role of Vertical Wind shear | |
Yamaguchi, Takanobu1,2; Feingold, Graham2; Kazil, Jan1,2 | |
2019-11-24 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:22页码:12244-12261 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | In shallow cumulus clouds, cloud deepening as a dynamical response to increased droplet number concentration has recently been shown to buffer the microphysical suppression of precipitation. In the current study, large eddy simulations with a two-moment bin microphysics model are employed to revisit this buffering and to investigate the role of vertical wind shear in aerosol-cloud interactions in trade wind cumuli. An idealized case is developed based on ship measurements and corresponding reanalysis data over the Sulu Sea in the Philippines in September 2012. A quasi-steady state is reached after roughly 25 - 35 hr for all six simulations performed (three different aerosol concentrations covering 35 - 230 cm(-3), with/without vertical wind shear). All simulations show that the aerosol effect is buffered, to first order; increased aerosol results in deeper clouds, a reduced cloud fraction, and an increase in the shortwave cloud radiative effect. For the no-shear cases, positive aerosol perturbations result in a small increase in surface precipitation, while the opposite is true in the presence of vertical wind shear because of muted deepening. Analysis shows competing influences of vertical wind shear; enhanced cloud clustering protects clouds from evaporation and entrainment while tilting of clouds enhances evaporation. In spite of the small responses of surface precipitation to very large changes in aerosol, cloud size and spatial distributions and charge/discharge precipitation cycles differ significantly, expressing changes in the pathways to surface precipitation and a dynamical buffering of the system. |
英文关键词 | Trade wind cumulus Aerosol-cloud interaction Wind shear Large eddy simulation |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000498235100001 |
WOS关键词 | LARGE-EDDY SIMULATION ; COALESCENCE EFFICIENCIES ; SIZE DISTRIBUTIONS ; PRECIPITATION ; MODEL ; PARAMETERIZATION ; ORGANIZATION ; COLLISION ; BREAKUP ; INVIGORATION |
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/225806 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA; 2.NOAA, Earth Syst Res Lab, Boulder, CO 80305 USA |
推荐引用方式 GB/T 7714 | Yamaguchi, Takanobu,Feingold, Graham,Kazil, Jan. Aerosol-Cloud Interactions in Trade Wind Cumulus Clouds and the Role of Vertical Wind shear[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(22):12244-12261. |
APA | Yamaguchi, Takanobu,Feingold, Graham,&Kazil, Jan.(2019).Aerosol-Cloud Interactions in Trade Wind Cumulus Clouds and the Role of Vertical Wind shear.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(22),12244-12261. |
MLA | Yamaguchi, Takanobu,et al."Aerosol-Cloud Interactions in Trade Wind Cumulus Clouds and the Role of Vertical Wind shear".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.22(2019):12244-12261. |
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