Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-19-0149.1 |
A Budget Equation for the Amplitude of Rossby Wave Packets Based on Finite-Amplitude Local Wave Activity | |
Ghinassi, Paolo1,2; Baumgart, Marlene1; Teubler, Franziska1; Riemer, Michael1; Wirth, Volkmar1 | |
2020 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2020 |
卷号 | 77期号:1页码:277-296 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; Italy |
英文摘要 | Recently, the authors proposed a novel diagnostic to quantify the amplitude of Rossby wave packets. This diagnostic extends the local finite-amplitude wave activity (LWA) of N. Nakamura and collaborators to the primitive-equations framework and combines it with a zonal filter to remove the phase dependence. In the present work, this diagnostic is used to investigate the dynamics of upper-tropospheric Rossby wave packets, with a particular focus on distinguishing between conservative dynamics and nonconservative processes. For this purpose, a budget equation for filtered LWA is derived and its utility is tested in a hierarchy of models. Idealized simulations with a barotropic and a dry primitive-equation model confirm the ability of the LWA diagnostic to identify nonconservative local sources or sinks of wave activity. In addition, the LWA budget is applied to forecast data for an episode in which the amplitude of an upper-tropospheric Rossby wave packet was poorly represented. The analysis attributes deficiencies in the Rossby wave packet amplitude to the misrepresentation of diabatic processes and illuminates the importance of the upper-level divergent outflow as a source for the error in the wave packet amplitude. |
英文关键词 | Large-scale motions Potential vorticity Rossby waves Baroclinic models Diagnostics |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000503247900001 |
WOS关键词 | POTENTIAL VORTICITY ; EXTRACTING ENVELOPES ; DYNAMICS ; CIRCULATION ; ERROR ; DISTURBANCES ; ATMOSPHERE ; FORECASTS ; MODEL ; VIEW |
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/280259 |
专题 | 地球科学 |
作者单位 | 1.Johannes Gutenberg Univ Mainz, Inst Atmospher Phys, Mainz, Germany; 2.CNR, ISAC, Bologna, Italy |
推荐引用方式 GB/T 7714 | Ghinassi, Paolo,Baumgart, Marlene,Teubler, Franziska,et al. A Budget Equation for the Amplitude of Rossby Wave Packets Based on Finite-Amplitude Local Wave Activity[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2020,77(1):277-296. |
APA | Ghinassi, Paolo,Baumgart, Marlene,Teubler, Franziska,Riemer, Michael,&Wirth, Volkmar.(2020).A Budget Equation for the Amplitude of Rossby Wave Packets Based on Finite-Amplitude Local Wave Activity.JOURNAL OF THE ATMOSPHERIC SCIENCES,77(1),277-296. |
MLA | Ghinassi, Paolo,et al."A Budget Equation for the Amplitude of Rossby Wave Packets Based on Finite-Amplitude Local Wave Activity".JOURNAL OF THE ATMOSPHERIC SCIENCES 77.1(2020):277-296. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论