Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-18-0138.1 |
Role of Finite-Amplitude Eddies and Mixing in the Life Cycle of Stratospheric Sudden Warmings | |
Lubis, Sandro W.; Huang, Clare S. Y.; Nakamura, Noboru | |
2018-11-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2018 |
卷号 | 75期号:11页码:3987-4003 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Despite the advances in theories and data availability since the first observation of stratospheric sudden warmings (SSWs) in the 1950s, some dynamical aspects of SSWs remain elusive, including the roles of wave transience at finite amplitude and irreversible wave dissipation due to mixing. This is likely due to a limitation of the traditional theory for SSWs that is tailored to small-amplitude waves and is unsuitable for large-scale wave events. To circumvent these difficulties, the authors utilized a novel approach based on finite-amplitude wave activity theory to quantify the roles of finite-amplitude wave transience and mixing in the life cycle of SSWs. In this framework, a departure from the exact nonacceleration relation can be directly attributed to irreversible mixing and diabatic forcings. The results show that prior to the warming event, an increase in pseudomomentum/wave activity largely compensates for the anomalous Eliassen-Palm flux convergence, while the total wave dissipation due to mixing (enstrophy dissipation) and radiative forcing only plays a secondary role. After the vortex breaks down, enhanced mixing increases irreversible wave dissipation and in turn slows down vortex recovery. It is shown that (i) a rapid recovery of the polar vortex is characterized by weak wave transience that follows a nonacceleration relation reversibly and (ii) a delayed recovery is attributed to stronger and more persistent irreversible wave dissipation due to mixing, a deviation from the classical nonacceleration relation. The results highlight the importance of mixing in the asymmetry between breakdown and recovery of the polar vortex during SSWs. |
英文关键词 | Nonlinear dynamics Planetary waves Rossby waves Stratospheric circulation Stratosphere-troposphere coupling |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000448364800004 |
WOS关键词 | LAGRANGIAN-MEAN DIAGNOSTICS ; WAVE ACTIVITY ; NORTHERN-HEMISPHERE ; WINTER STRATOSPHERE ; POTENTIAL VORTICITY ; CIRCULATION MODEL ; FLOW INTERACTION ; PLANETARY-WAVES ; POLAR VORTICES ; PART I |
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/29266 |
专题 | 地球科学 |
作者单位 | Univ Chicago, Dept Geophys Sci, 5734 S Ellis Ave, Chicago, IL 60637 USA |
推荐引用方式 GB/T 7714 | Lubis, Sandro W.,Huang, Clare S. Y.,Nakamura, Noboru. Role of Finite-Amplitude Eddies and Mixing in the Life Cycle of Stratospheric Sudden Warmings[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2018,75(11):3987-4003. |
APA | Lubis, Sandro W.,Huang, Clare S. Y.,&Nakamura, Noboru.(2018).Role of Finite-Amplitude Eddies and Mixing in the Life Cycle of Stratospheric Sudden Warmings.JOURNAL OF THE ATMOSPHERIC SCIENCES,75(11),3987-4003. |
MLA | Lubis, Sandro W.,et al."Role of Finite-Amplitude Eddies and Mixing in the Life Cycle of Stratospheric Sudden Warmings".JOURNAL OF THE ATMOSPHERIC SCIENCES 75.11(2018):3987-4003. |
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