Optimal Perturbations Triggering Weather Regime Transitions: Onset of Blocking and Strong Zonal Flow
文献类型：期刊论文
| 作者 | Jiang Zhina1; Mu Mu2,3; Wang Donghai1 |
| 刊名 | ADVANCES IN ATMOSPHERIC SCIENCES
 |
| 出版日期 | 2011 |
| 卷号 | 28期号:1页码:59-68 |
| 关键词 | Linear Approximation Symmetry Nonlinearity Asymmetry |
| ISSN号 | 0256-1530 |
| DOI | 10.1007/s00376-010-9097-0 |
| 文献子类 | Article |
| 英文摘要 | In this paper, the approach proposed by Mu and Jiang (2008) to obtain the optimal perturbations for triggering blocking (BL) onset is generalized to seek the optimal perturbations triggering onset of the strong zonal flow (SZF) regime. The BL and SZF regimes are characterized by the same dipole-like anomaly pattern superposed on the climatological flow, but with opposite sign. The results show that this method is also superior at finding the initial optimal perturbations triggering onset of the SZF regime, especially in the medium range.; In this paper, the approach proposed by Mu and Jiang (2008) to obtain the optimal perturbations for triggering blocking (BL) onset is generalized to seek the optimal perturbations triggering onset of the strong zonal flow (SZF) regime. The BL and SZF regimes are characterized by the same dipole-like anomaly pattern superposed on the climatological flow, but with opposite sign. The results show that this method is also superior at finding the initial optimal perturbations triggering onset of the SZF regime, especially in the medium range. Furthermore, by comparing the two kinds of conditional nonlinear optimal perturbations (CNOPs) triggering onset; of BL and SZF regimes, we find that in the linear approximation, there is symmetry in the sensitivities for BL and SZF onset, and the perturbations that optimally trigger onset of BL and SZF regimes at times when linear approximation is valid are also characterized by the same spatial pattern but with opposite sign. Whereas when the optimization time is extended to 6 days, the two kinds of CNOPs lose their out-of-phase behavior. The nonlinearity results in an asymmetry between the sensitivity for BL and SZF onset. Additionally, we find that the optimal perturbations have one common property, which is that the second baroclinic mode contributes more to the initial perturbations while the barotropic mode dominates the final structures. |
| 学科主题 | Meteorology & Atmospheric Sciences |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000285274700005 |
| 公开日期 | 2012-07-03 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/11600]  |
| 专题 | 海洋研究所_海洋环流与波动重点实验室 |
| 作者单位 | 1.Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing 100081, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Wave, Qingdao 266071, Peoples R China 3.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang Zhina,Mu Mu,Wang Donghai. Optimal Perturbations Triggering Weather Regime Transitions: Onset of Blocking and Strong Zonal Flow[J]. ADVANCES IN ATMOSPHERIC SCIENCES,2011,28(1):59-68. |
| APA | Jiang Zhina,Mu Mu,&Wang Donghai.(2011).Optimal Perturbations Triggering Weather Regime Transitions: Onset of Blocking and Strong Zonal Flow.ADVANCES IN ATMOSPHERIC SCIENCES,28(1),59-68. |
| MLA | Jiang Zhina,et al."Optimal Perturbations Triggering Weather Regime Transitions: Onset of Blocking and Strong Zonal Flow".ADVANCES IN ATMOSPHERIC SCIENCES 28.1(2011):59-68. |
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来源：海洋研究所
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