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| Effect of Baroclinicity on Vortex Axisymmetrization.Part Ⅰ：Barotropic Basic Vortex | |
| 引用本文： | Melinda S.PENG,;Jiayi PENG,;Tim LI,;Eric HENDRICKS. Effect of Baroclinicity on Vortex Axisymmetrization.Part Ⅰ：Barotropic Basic Vortex[J]. 大气科学进展, 2014, 31(6): 1256-1266. DOI: 10.1007/s00376-014-3237-x |
| 作者姓名： | Melinda S.PENG, Jiayi PENG, Tim LI, Eric HENDRICKS |
| 作者单位： | [1]Naval Research Laboratory, Monterey, California, USA; [2]IMSG at Environmental Modeling Center, NCEP/NOAA, College Park, Maryland, USA; [3]Department of Meteorology and IPRC, University of Hawaii at Manoa, Honolulu, Hawaii, USA |
| 基金项目： | This work was sponsored by ONR Grants PE 0602435N and N000140310739. |
| 摘 要： | The barotropic and baroclinic disturbances axisymmetrized by the barotropic basic vortex are examined in an idealized modeling framework consisting of two layers.Using a Wentzel-Kramers-Brillouin approach,the radial propagation of a baroclinic disturbance is shown to be slower than a barotropic disturbance,resulting in a slower linear axisymmetrization for baroclinic disturbances.The slower-propagating baroclinic waves also cause more baroclinic asymmetric kinetic energy to be transferred directly to the barotropic symmetric vortex than from barotropic disturbances,resulting in a faster axisymmetrization process in the nonlinear baroclinic wave case than in the nonlinear barotropic wave case. |
| 关 键 词： | 斜压波 涡流比 正压 理想化模型 非线性 不对称 扰动 框架包 |
Effect of baroclinicity on vortex axisymmetrization. Part I: Barotropic basic vortex |
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| Melinda S. Peng,Jiayi Peng,Tim Li,Eric Hendricks. Effect of baroclinicity on vortex axisymmetrization. Part I: Barotropic basic vortex[J]. Advances in Atmospheric Sciences, 2014, 31(6): 1256-1266. DOI: 10.1007/s00376-014-3237-x | |
| Authors: | Melinda S. Peng Jiayi Peng Tim Li Eric Hendricks |
| Affiliation: | 1. Naval Research Laboratory, Monterey, California, USA 2. IMSG at Environmental Modeling Center, NCEP/NOAA, College Park, Maryland, USA 3. Department of Meteorology and IPRC, University of Hawaii at Manoa, Honolulu, Hawaii, USA |
| Abstract: | The barotropic and baroclinic disturbances axisymmetrized by the barotropic basic vortex are examined in an idealized modeling framework consisting of two layers. Using a Wentzel-Kramers-Brillouin approach, the radial propagation of a baroclinic disturbance is shown to be slower than a barotropic disturbance, resulting in a slower linear axisymmetrization for baroclinic disturbances. The slower-propagating baroclinic waves also cause more baroclinic asymmetric kinetic energy to be transferred directly to the barotropic symmetric vortex than from barotropic disturbances, resulting in a faster axisymmetrization process in the nonlinear baroclinic wave case than in the nonlinear barotropic wave case. |
| Keywords: | vortex axisymmetrization asymmetry baroclinicity |
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