Estimation of geostrophic velocity from seismic images of mesoscale eddy in the South China Sea
文献类型：期刊论文
| 作者 | Huang Xing-Hui1,2; Song Hai-Bin1; Bai Yang1,2; Liu Bo-Ran1,2; Chen Jiang-Xin1,2 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2013 |
| 卷号 | 56期号:1页码:181-187 |
| 关键词 | Seismic Oceanography Southwest Sub-basin Of South China Sea Mesoscale Eddy Geostrophic Shear |
| ISSN号 | 0001-5733 |
| DOI | 10.6038/cjg20130118 |
| 文献子类 | Article |
| 英文摘要 | Mesoscale eddy is an important oceanographic phenomenon which significantly affects the whole oceanic energy budget. Due to the inherent limitations of traditional oceanographic observation methods, the degree of observations and research of mesoscale eddy has been relatively low. Seismic Oceanography, a new interdisciplinary subject of reflection seismology and physical oceanography, provides a new approach for oceanographic observations. After reprocessing of a legacy seismic data acquired in the South China Sea, a lens-like structure was detected for the first time in this region from seismic profiles. It is located in the Southwestern sub-basin of South China Sea (similar to 113.6 degrees E, 11.4 degrees N) with the equilibrium depth of about 450 m, center thickness of about 300 m and radius of 55 similar to 65 km, showing typical characteristics of a mesoscale eddy. With the additional information of sea level anomalies (SLA) and sea-surface geostrophic current from AVISO, the lens-like structure was interpreted as an anticyclonic mesoscale eddy. Geostrophic shear was also estimated using the seismic oceanographic method. Absolute values of geostrophic velocity were determined by integrating the shear over depth from a known level, i.e. sea surface values from AVISO. The results show that the maximum value of geostrophic velocity is about 0.7 m/s, distributed in the depth range of 400 similar to 450 m, corresponding to the equilibrium depth. Of this eddy, the northwest part is positive while the southeast part is negative, showing a clockwise rotation as a whole, indicating that it is an anticyclonic structure. |
| WOS关键词 | EMPIRICAL MODE DECOMPOSITION ; INTERNAL WAVES ; EDDIES ; TEMPERATURE |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000314480100018 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/86500]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Huang Xing-Hui |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang Xing-Hui,Song Hai-Bin,Bai Yang,et al. Estimation of geostrophic velocity from seismic images of mesoscale eddy in the South China Sea[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2013,56(1):181-187. |
| APA | Huang Xing-Hui,Song Hai-Bin,Bai Yang,Liu Bo-Ran,&Chen Jiang-Xin.(2013).Estimation of geostrophic velocity from seismic images of mesoscale eddy in the South China Sea.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,56(1),181-187. |
| MLA | Huang Xing-Hui,et al."Estimation of geostrophic velocity from seismic images of mesoscale eddy in the South China Sea".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 56.1(2013):181-187. |
入库方式： OAI收割
来源：地质与地球物理研究所
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