Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-16-0376.1 |
A Grid-Refinement-Based Approach for Modeling the Convective Boundary Layer in the Gray Zone: A Pilot Study | |
Zhou, Bowen1,2; Xue, Ming1,2,3,4; Zhu, Kefeng1,2 | |
2017-11-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2017 |
卷号 | 74期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | The model gray zone refers to the range of grid spacings comparable to the dominant length scale of the flow. In the gray zone, the flow is partially resolved and partially subgrid scale (SGS). Neither ensemble-averaging-based parameterizations nor turbulence closures are appropriate for parameterizing the effects of SGS motions on the resolved flow. The gray zone of the convective boundary layer (CBL) is in the range of CBL depth, typically O(1) km. A new approach that seeks explicit resolution of the unstable surface layer through a nest layer of fine grid spacing is proposed to improve CBL parameterization in the gray zone. To provide the theoretical basis for the approach, a linear analytic model is presented, and one-way nested simulations are performed to investigate the dynamical coupling between the surface layer and the mixed layer. The analytic model shows that at the onset of thermal instability, the vertical and horizontal structures of the mixed layer are set by surface-layer forcings. The nested 3D simulations extend the findings from the analytic model and further reveal potential improvements in high-order statistics and resolved convective structures both including and extending above the nest region compared to the stand-alone gray-zone simulations. This study suggests that when the most energetic scales of CBL convection are resolved in the surface layer, the overall simulation of the CBL improves at gray-zone resolutions. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000417994800001 |
WOS关键词 | NUMERICAL WEATHER PREDICTION ; NONHYDROSTATIC ATMOSPHERIC SIMULATION ; LARGE-EDDY SIMULATIONS ; TERRA-INCOGNITA ; PART I ; SYSTEM ARPS ; MESOSCALE ; FLOW ; TRANSITION ; TURBULENCE |
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/29718 |
专题 | 地球科学 |
作者单位 | 1.Nanjing Univ, Minist Educ, Key Lab Mesoscale Severe Weather, Nanjing, Jiangsu, Peoples R China; 2.Nanjing Univ, Sch Atmospher Sci, Nanjing, Jiangsu, Peoples R China; 3.Univ Oklahoma, Ctr Anal & Predict Storms, Norman, OK 73019 USA; 4.Univ Oklahoma, Sch Meteorol, Norman, OK 73019 USA |
推荐引用方式 GB/T 7714 | Zhou, Bowen,Xue, Ming,Zhu, Kefeng. A Grid-Refinement-Based Approach for Modeling the Convective Boundary Layer in the Gray Zone: A Pilot Study[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2017,74(11). |
APA | Zhou, Bowen,Xue, Ming,&Zhu, Kefeng.(2017).A Grid-Refinement-Based Approach for Modeling the Convective Boundary Layer in the Gray Zone: A Pilot Study.JOURNAL OF THE ATMOSPHERIC SCIENCES,74(11). |
MLA | Zhou, Bowen,et al."A Grid-Refinement-Based Approach for Modeling the Convective Boundary Layer in the Gray Zone: A Pilot Study".JOURNAL OF THE ATMOSPHERIC SCIENCES 74.11(2017). |
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