The impact of mean dynamic topography on a sea-level anomaly assimilation in the South China Sea based on an eddy-resolving model
文献类型：期刊论文
| 作者 | Xu, DZ ; Zhu, J ; Qi, YQ ; Li, XC ; Yan, YF |
| 刊名 | ACTA OCEANOLOGICA SINICA
 |
| 出版日期 | 2012 |
| 卷号 | 31期号:5页码:41603 |
| 关键词 | data assimilation mean dynamic topography sea level anomaly South China Sea |
| ISSN号 | 0253-505X |
| 通讯作者 | jzhu@mail.iap.ac.cn |
| 中文摘要 | The sea-level anomaly (SLA) from a satellite altimeter has a high accuracy and can be used to improve ocean state estimation by assimilation techniques. However, the lack of an accurate mean dynamic topography (MDT) is still a bothersome issue in an ocean data assimilation. The previous studies showed that the errors in MDT have significant impacts on assimilation results, especially on the time-mean components of ocean states and on the time variant parts of states via nonlinear ocean dynamics. The temporal-spatial differences of three MDTs and their impacts on the SLA analysis are focused on in the South China Sea (SCS). The theoretical analysis shows that even for linear models, the errors in MDT have impacts on the SLA analysis using a sequential data assimilation scheme. Assimilation experiments, based on EnOI scheme and HYCOM, with three MDTs from July 2003 to June 2004 also show that the SLA assimilation is very sensitive to the choice of different MDTs in the SCS with obvious differences between the experimental results and observations in the centre of the SCS and in the vicinity of the Philippine Islands. A new MDT for assimilation of SLA data in the SCS was proposed. The results from the assimilation experiment with this new MDT show a marked reduction (increase) in the RMSEs (correlation coefficient) between the experimental and observed SLA. Furthermore, the subsurface temperature field is also improved with this new MDT in the SCS. |
| 学科主题 | Oceanography |
| 语种 | 英语 |
| WOS记录号 | WOS:000309856200002 |
| 公开日期 | 2013-08-28 |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/10111]  |
| 专题 | 南海海洋研究所_热带海洋环境国家重点实验室(LTO) |
| 推荐引用方式 GB/T 7714 | Xu, DZ,Zhu, J,Qi, YQ,et al. The impact of mean dynamic topography on a sea-level anomaly assimilation in the South China Sea based on an eddy-resolving model[J]. ACTA OCEANOLOGICA SINICA,2012,31(5):41603. |
| APA | Xu, DZ,Zhu, J,Qi, YQ,Li, XC,&Yan, YF.(2012).The impact of mean dynamic topography on a sea-level anomaly assimilation in the South China Sea based on an eddy-resolving model.ACTA OCEANOLOGICA SINICA,31(5),41603. |
| MLA | Xu, DZ,et al."The impact of mean dynamic topography on a sea-level anomaly assimilation in the South China Sea based on an eddy-resolving model".ACTA OCEANOLOGICA SINICA 31.5(2012):41603. |
入库方式： OAI收割
来源：南海海洋研究所
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