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| Effects of nonlinear physical processes on optimal error growth in predictability experiments of the Kuroshio Large Meander | |
| Wang, Qiang1,2; Mu, Mu1; Dijkstra, Henk A.3; Mu, M | |
| 2013-12-01 | |
| 发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
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| ISSN | 2169-9275 |
| 卷号 | 118期号:12页码:6425-6436 |
| 文章类型 | Article |
| 摘要 | Within a 1.5-layer shallow-water model, the effects of nonlinear physical processes on the optimal error growth in the predictability experiments of the Kuroshio Large Meander (LM) are investigated. To clarify these effects, we use both the conditional nonlinear optimal perturbation (CNOP) and the first singular vector (FSV) methods. By examining the nonlinear evolution of the CNOPs and the FSVs, we find that the nonlinear physical processes play an important role in the error growth, in particular for the initial errors with large amplitudes. The specific roles of nonlinear processes in error growth are identified by determining the error development in modified nonlinear equations in which particular terms are neglected. The results demonstrate that advection of momentum perturbations, associated with the nonlinear development of barotropic instabilities, tend to enhance the evolution of the errors and cause the forecasted Kuroshio Large Meander to be strengthened. The nonlinear process related to the divergence of velocity perturbations caused by upper-layer thickness perturbations enhances the optimal error growth, whereas the advection of upper-layer thickness perturbations by velocity perturbations suppresses it.; Within a 1.5-layer shallow-water model, the effects of nonlinear physical processes on the optimal error growth in the predictability experiments of the Kuroshio Large Meander (LM) are investigated. To clarify these effects, we use both the conditional nonlinear optimal perturbation (CNOP) and the first singular vector (FSV) methods. By examining the nonlinear evolution of the CNOPs and the FSVs, we find that the nonlinear physical processes play an important role in the error growth, in particular for the initial errors with large amplitudes. The specific roles of nonlinear processes in error growth are identified by determining the error development in modified nonlinear equations in which particular terms are neglected. The results demonstrate that advection of momentum perturbations, associated with the nonlinear development of barotropic instabilities, tend to enhance the evolution of the errors and cause the forecasted Kuroshio Large Meander to be strengthened. The nonlinear process related to the divergence of velocity perturbations caused by upper-layer thickness perturbations enhances the optimal error growth, whereas the advection of upper-layer thickness perturbations by velocity perturbations suppresses it. |
| 关键词 | Error Growth Kuroshio Large Meander Cnop Singular Vector |
| 学科领域 | Oceanography |
| DOI | 10.1002/2013JC009276 |
| URL | 查看原文 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS研究方向 | Oceanography |
| WOS类目 | Oceanography |
| WOS记录号 | WOS:000329926200007 |
| WOS关键词 | RANGE PREDICTION EXPERIMENTS ; PATH VARIABILITIES SOUTH ; DATA-ASSIMILATION ; OPTIMAL PERTURBATION ; WIND STRESS ; JAPAN ; MODEL ; OCEAN ; BIMODALITY ; EXTENSION |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/16406 |
| 专题 | 海洋环流与波动重点实验室 |
| 通讯作者 | Mu, M |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Ocean Circulat & Waves, Inst Oceanol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Inst Atmospher Phys, LASG, Beijing, Peoples R China 3.Univ Utrecht, Dept Phys & Astron, Inst Marine & Atmospher Res Utrecht, Utrecht, Netherlands |
| 第一作者单位 | 海洋环流与波动重点实验室 |
| 推荐引用方式 GB/T 7714 | Wang, Qiang,Mu, Mu,Dijkstra, Henk A.,et al. Effects of nonlinear physical processes on optimal error growth in predictability experiments of the Kuroshio Large Meander[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2013,118(12):6425-6436. |
| APA | Wang, Qiang,Mu, Mu,Dijkstra, Henk A.,&Mu, M.(2013).Effects of nonlinear physical processes on optimal error growth in predictability experiments of the Kuroshio Large Meander.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,118(12),6425-6436. |
| MLA | Wang, Qiang,et al."Effects of nonlinear physical processes on optimal error growth in predictability experiments of the Kuroshio Large Meander".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 118.12(2013):6425-6436. |
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| Effects of nonlinear（896KB） | 限制开放 | CC BY-NC-SA | 浏览 | |||
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