Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2018.01.015 |
The impact of boundary layer turbulence on snow growth and precipitation: Idealized Large Eddy Simulations | |
Chu, Xia1; Xue, Lulin2; Geerts, Bart1; Kosovic, Branko2 | |
2018-05-15 | |
发表期刊 | ATMOSPHERIC RESEARCH |
ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2018 |
卷号 | 204页码:54-66 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Ice particles and supercooled droplets often co-exist in planetary boundary-layer (PBL) clouds. The question examined in this numerical study is how large turbulent PBL eddies affect snow growth and surface precipitation from mixed-phase PBL clouds. In order to simplify this question, this study assumes an idealized BL with well developed turbulence but no surface heat fluxes or radiative heat exchanges. Large Eddy Simulations with and without resolved PBL turbulence are compared. This comparison demonstrates that the impact on snow growth in mixed-phase clouds is controlled by two opposing mechanisms, a microphysical and a dynamical one. The cloud microphysical impact of large turbulent eddies is based on the difference in saturation vapor pressure over water and over ice. The net outcome of alternating turbulent up- and downdrafts is snow growth by diffusion and/or accretion (riming). On the other hand, turbulence-induced entrainment and detrainment may suppress snow growth. In the case presented herein, the net effect of these microphysical and dynamical processes is positive, but in general the net effect depends on ambient conditions, in particular the profiles of temperature, humidity, and wind. |
英文关键词 | Large-eddy turbulence Mixed-phase cloud Snow growth Large Eddy Simulation |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000428494800005 |
WOS关键词 | DROPLET SIZE DISTRIBUTIONS ; TOP GENERATING CELLS ; MIXED-PHASE CLOUDS ; PART I ; MARINE STRATOCUMULUS ; EXPLICIT FORECASTS ; CUMULUS CLOUD ; COLD CLOUDS ; MODEL ; MICROPHYSICS |
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/38290 |
专题 | 地球科学 |
作者单位 | 1.Univ Wyoming, Dept Atmospher Sci, Laramie, WY 82071 USA; 2.Natl Ctr Atmospher Res, Res Applicat Lab, Boulder, CO 80307 USA |
推荐引用方式 GB/T 7714 | Chu, Xia,Xue, Lulin,Geerts, Bart,et al. The impact of boundary layer turbulence on snow growth and precipitation: Idealized Large Eddy Simulations[J]. ATMOSPHERIC RESEARCH,2018,204:54-66. |
APA | Chu, Xia,Xue, Lulin,Geerts, Bart,&Kosovic, Branko.(2018).The impact of boundary layer turbulence on snow growth and precipitation: Idealized Large Eddy Simulations.ATMOSPHERIC RESEARCH,204,54-66. |
MLA | Chu, Xia,et al."The impact of boundary layer turbulence on snow growth and precipitation: Idealized Large Eddy Simulations".ATMOSPHERIC RESEARCH 204(2018):54-66. |
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