Eddy generation and evolution in the North Pacific Subtropical Countercurrent(NPSC) zone
文献类型：CNKI期刊论文
| 作者 | Kang L(康霖); Wang F(王凡) ; Chen YL(陈永利)
|
| 发表日期 | 2010-09-15 |
| 出处 | Chinese Journal of Oceanology and Limnology
 |
| 关键词 | TOPEX/POSEIDON altimetry eddy field EKE velocity shear North Pacific Subtropical Countercurrent |
| 英文摘要 | The seasonal generation and evolution of eddies in the region of the North Pacific Subtropical Countercurrent remain poorly understood due to the scarcity of available data.We used TOPEX/POSEIDON altimetry data from 1992 to 2007 to study the eddy field in this zone.We found that velocity shear between this region and the neighboring North Equatorial Current contributes greatly to the eddy generation.Furthermore,the eddy kinetic energy level(EKE) shows an annual cycle,maximum in April/May and minimum in December/January.Analyses of the temporal and spatial distributions of the eddy field revealed clearly that the velocity shear closely related to baroclinic instability processes.The eddy field seems to be more zonal than meridional,and the energy containing length scale shows a surprising lag of 2-3 months in comparison with the 1-D and 2-D EKE level.A similar phenomenon is observed in individual eddies in this zone.The results show that in this eddy field band,the velocity shear may drive the EKE level change so that the eddy field takes another 2-3 months to grow and interact to reach a relatively stable state.This explains the seasonal evolution of identifiable eddies. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | Supported by the Key Program of the Knowledge Innovation Program of the Chinese Academy of Sciences (No.KZCX1-YW-12-04) ; the National Basic Research Program (973 Program) (No.2006CB403601) |
| 卷 | v.28期:05页:16-21 |
| 语种 | 英文; |
| 分类号 | P731.2 |
| ISSN号 | 0254-4059 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/191955]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.KeyLaboratoryofCirculationandWaves,ChineseAcademyofSciences 2.InstituteofOceanology,ChineseAcademyofSciences 3.GraduateUniversityofChineseAcademyofSciences |
| 推荐引用方式 GB/T 7714 | Kang L,Wang F,Chen YL. Eddy generation and evolution in the North Pacific Subtropical Countercurrent(NPSC) zone. 2010. |
入库方式： OAI收割
来源：海洋研究所
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