Mean properties of mesoscale eddies in the Kuroshio recirculation region
文献类型：期刊论文
| 作者 | Ma Libin1,2; Wang Qiang1 |
| 刊名 | CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
 |
| 出版日期 | 2014-05-01 |
| 卷号 | 32期号:3页码:681-702 |
| 关键词 | mesoscale eddies spatial distributions temporal variations potential factors |
| 通讯作者 | Ma, LB (reprint author), Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China. |
| 英文摘要 | Using a 19-year altimetric dataset, the mean properties and spatiotemporal variations of eddies in the Kuroshio recirculation region are examined. A total of 2 001 cyclonic tracks and 1 847 anticyclonic tracks were identified using a geometry-based eddy detection method. The mean radius was 57 km for cyclonic eddies and was 61 km for anticyclonic eddies, respectively, and the mean lifetime was about 10 weeks for both type eddies. There were asymmetric spatial distributions for eddy generation and eddy termination, which were domain-dependent. Mean eddy generation rates were 2.0 per week for cyclonic eddies and were 1.9 per week for anticyclonic eddies. Both type eddies tended to deform during their lifetime and had different propagation characteristics, which mainly propagated westward and southwestward with velocities 4.0-9.9 cm/s, in the Kuroshio recirculation region. Further discussion illustrates that the eddy westward speed maybe influenced by the combined effect of vertical shear of horizontal currents and nonlinearity of eddy. To better understand the evolution of eddy tracks, a total of 134 long-lived tracks (lifetime a parts per thousand yen20 weeks) were examined. Comparison between short-span eddies (lifetime a parts per thousand yen4 weeks and < 20 weeks) and long-lived eddies is also conducted and the result shows that the short-span and long-lived eddies have similar time evolution. Finally, eddy seasonal variations and interannual changes are discussed. Correlation analysis shows that eddy activity is sensitive to the wind stress curl and meridional gradient of sea surface temperature on interannual timescales. Besides, the strength and orientation of background flows also have impacts on the eddy genesis. |
| 学科主题 | Marine & Freshwater Biology; Oceanography |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000335767800019 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/23943]  |
| 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.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma Libin,Wang Qiang. Mean properties of mesoscale eddies in the Kuroshio recirculation region[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2014,32(3):681-702. |
| APA | Ma Libin,&Wang Qiang.(2014).Mean properties of mesoscale eddies in the Kuroshio recirculation region.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,32(3),681-702. |
| MLA | Ma Libin,et al."Mean properties of mesoscale eddies in the Kuroshio recirculation region".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 32.3(2014):681-702. |
入库方式： OAI收割
来源：海洋研究所
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