Optimal precursor of the transition from Kuroshio large meander to straight path
文献类型：期刊论文
| 作者 | Wang Qiang1,2; Ma Libin1,3; Xu Qiangqiang4 |
| 刊名 | CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
 |
| 出版日期 | 2013-09-01 |
| 卷号 | 31期号:5页码:1153-1161 |
| 关键词 | Kuroshio large meander (LM) precursor conditional nonlinear optimal perturbation (CNOP) |
| ISSN号 | 0254-4059 |
| 通讯作者 | Ma, LB |
| 中文摘要 | We used the conditional nonlinear optimal perturbation (CNOP) method to explore the optimal precursor of the transition from Kuroshio large meander (LM) to straight path within a barotropic inflowout-flow model, and found that large amplitudes of the optimal precursor are mainly located in the east of Kyushu, which implies that perturbations in the region are important for the transition from LM to straight path. Furthermore, we investigated the transition processes caused by the optimal precursor, and found that these processes could be divided into three stages. In the first stage, a cyclonic eddy is advected to the formation region of the Kuroshio large meander, which enhances the LM path and causes a cyclonic eddy to shed from the Kuroshio mainstream. This process causes the LM path to change into a small meander path. Subsequently, the small meander is maintained for a period because the vorticity advection is balanced by the beta effect in the second stage. In the third stage, the small meander weakens and the straight path ultimately forms. The positive vorticity advecting downstream is responsible for this process. The exploration of the optimal precursor will conduce to improve the prediction of the transition processes from LM path to straight path, and its spatial structure can be used to guide Kuroshio targeted observation studies. |
| 英文摘要 | We used the conditional nonlinear optimal perturbation (CNOP) method to explore the optimal precursor of the transition from Kuroshio large meander (LM) to straight path within a barotropic inflowout-flow model, and found that large amplitudes of the optimal precursor are mainly located in the east of Kyushu, which implies that perturbations in the region are important for the transition from LM to straight path. Furthermore, we investigated the transition processes caused by the optimal precursor, and found that these processes could be divided into three stages. In the first stage, a cyclonic eddy is advected to the formation region of the Kuroshio large meander, which enhances the LM path and causes a cyclonic eddy to shed from the Kuroshio mainstream. This process causes the LM path to change into a small meander path. Subsequently, the small meander is maintained for a period because the vorticity advection is balanced by the beta effect in the second stage. In the third stage, the small meander weakens and the straight path ultimately forms. The positive vorticity advecting downstream is responsible for this process. The exploration of the optimal precursor will conduce to improve the prediction of the transition processes from LM path to straight path, and its spatial structure can be used to guide Kuroshio targeted observation studies. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences |
| 学科主题 | Marine & Freshwater Biology ; Oceanography |
| 类目[WOS] | Limnology ; Oceanography |
| 研究领域[WOS] | Marine & Freshwater Biology ; Oceanography |
| 关键词[WOS] | NONLINEAR OPTIMAL PERTURBATION ; RANGE PREDICTION EXPERIMENTS ; VARIABILITIES SOUTH ; JAPAN ; MODEL ; PREDICTABILITY ; CIRCULATION ; SENSITIVITY ; FORECAST ; SYSTEM |
| 收录类别 | SCI |
| 原文出处 | 10.1007/s00343-013-2301-1 |
| 语种 | 英语 |
| WOS记录号 | WOS:000324111300023 |
| 公开日期 | 2014-07-17 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/16425]  |
| 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 Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Inst Atmospher Phys, LASG, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Shanghai 200090, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang Qiang,Ma Libin,Xu Qiangqiang. Optimal precursor of the transition from Kuroshio large meander to straight path[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2013,31(5):1153-1161. |
| APA | Wang Qiang,Ma Libin,&Xu Qiangqiang.(2013).Optimal precursor of the transition from Kuroshio large meander to straight path.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,31(5),1153-1161. |
| MLA | Wang Qiang,et al."Optimal precursor of the transition from Kuroshio large meander to straight path".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 31.5(2013):1153-1161. |
入库方式： OAI收割
来源：海洋研究所
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