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DOI | 10.1175/JAS-D-16-0184.1 |
The Impact of Dimensionality on Barotropic Processes during KWAJEX | |
Xu, Huiyan; Li, Xiaofan | |
2017-08-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2017 |
卷号 | 74期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | In this study, the 2D and 3D cloud-resolving model simulations of the Tropical Rainfall Measuring Mission (TRMM) Kwajalein Experiment (KWAJEX) are compared to study the impact of dimensionality on barotropic processes during tropical convective development. Barotropic conversion of perturbation kinetic energy is associated with vertical transport of horizontal momentum under vertical shear of background horizontal winds. The similarities in both 2D and 3D model simulations show that 1) vertical wind shear is a necessary condition for barotropic conversion, but it does not control the barotropic conversion; 2) the evolution of barotropic conversion is related to that of the vertical transport of horizontal momentum; and 3) the tendency of vertical transport of horizontal momentum is mainly determined by the covariance between horizontal wind and the cloud hydrometeor component of buoyancy. The differences between the 2D and 3D model simulations reveal that 1) the barotropic conversion has shorter time scales and a larger contribution in the 2D model simulation than in the 3D model simulation and 2) kinetic energy is generally converted from the mean circulations to perturbation circulations in the 3D model simulation. In contrast, more kinetic energy is transferred from perturbation circulations to the mean circulations in the 2D model simulation. The same large-scale vertical velocity may account for the similarities, whereas the inclusion of meridional winds in the 3D model simulation may be responsible for the differences in barotropic conversion between the 2D and 3D model simulations. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000409133100014 |
WOS关键词 | VERTICAL WIND SHEAR ; RESOLVING MODEL SIMULATIONS ; RADIATIVE-CONVECTIVE EQUILIBRIUM ; TROPICAL CONVECTION ; DEEP CONVECTION ; MESOSCALE PROCESSES ; CUMULUS CLOUDS ; PART I ; MOMENTUM ; SYSTEMS |
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/29298 |
专题 | 地球科学 |
作者单位 | Zhejiang Univ, Sch Earth Sci, Dept Atmospher Sci, Hangzhou, Zhejiang, Peoples R China |
推荐引用方式 GB/T 7714 | Xu, Huiyan,Li, Xiaofan. The Impact of Dimensionality on Barotropic Processes during KWAJEX[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2017,74(8). |
APA | Xu, Huiyan,&Li, Xiaofan.(2017).The Impact of Dimensionality on Barotropic Processes during KWAJEX.JOURNAL OF THE ATMOSPHERIC SCIENCES,74(8). |
MLA | Xu, Huiyan,et al."The Impact of Dimensionality on Barotropic Processes during KWAJEX".JOURNAL OF THE ATMOSPHERIC SCIENCES 74.8(2017). |
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