| LIU Hongwei,ZHANG Qilong,DUAN Yongliang,HOU Yijun. 2011. The three-dimensional structure and seasonal variation of the North Pacific meridional overturning circulation. Acta Oceanologica Sinica, (3):33－42 |
| The three-dimensional structure and seasonal variation of the North Pacific meridional overturning circulation |
| The three-dimensional structure and seasonal variation of the North Pacific meridional overturning circulation |
| Received:February 05, 2010 Revised:January 15, 2011 |
| DOI：10.1007/s13131-011-0117-4 |
| Key words:North Pacific meridional overturning circulation three-dimensional structure seasonal variation |
| 中文关键词: North Pacific meridional overturning circulation three-dimensional structure seasonal variation |
| 基金项目:Supported by the National Basic Research Development Program of China (973 Program) under contract Nos 2007CB816002, 2007CB816005 and the innovative key project of Chinese Academy of Sciences under contract No. KZCXZ-YW-201. |
| Author Name | Affiliation | E-mail | | LIU Hongwei | Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
Key Laboratory of Ocean Circulation and Waves(KLOCAW), Chinese Academy of Sciences, Qingdao 266071, China
The Graduate School of the Chinese Academy of Sciences, Beijing 100049, China | | | ZHANG Qilong | Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
Key Laboratory of Ocean Circulation and Waves(KLOCAW), Chinese Academy of Sciences, Qingdao 266071, China | qlzhang@qdio.ac.cn | | DUAN Yongliang | Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
Key Laboratory of Ocean Circulation and Waves(KLOCAW), Chinese Academy of Sciences, Qingdao 266071, China
The Graduate School of the Chinese Academy of Sciences, Beijing 100049, China | | | HOU Yijun | Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
Key Laboratory of Ocean Circulation and Waves(KLOCAW), Chinese Academy of Sciences, Qingdao 266071, China | |
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| Abstract: |
The three-dimensional structure and the seasonal variation of the North Pacific meridional overturning circulation (NPMOC) are analyzed based on the Simple Ocean Data Assimilation data and Argo profiling float data. The NPMOC displays a multi-cell structure with four cells in the North Pacific altogether. The TC and the STC are a strong clockwise meridional cell in the low latitude ocean and a weaker clockwise meridional cell between 7°N and 18°N, respectively, while the DTC and the subpolar cell are a weaker anticlockwise meridional cell between 3°N and 15°N and a weakest anticlockwise meridional cell between 35°N and 50°N, respectively.
The DTC, the TC and the STC are all of very strong seasonal variations. As to the DTC, the southward transport is strongest in fall and weakest in spring. For the TC, the northward transport is strongest in winter and weakest in spring, while the southward transport is strongest in fall and weakest in spring, which is associated with the strong southward flow of the DTC in fall. As the STC, the northward transport is strongest in winter and weakest in summer, while the southward transport is strongest in summer and weakest in spring. This seasonal difference may be associated with the DTC. The zonal wind stress and the east-west slope of sea level play important roles in the seasonal variations of the TC, the STC and the DTC. |
| 中文摘要: |
The three-dimensional structure and the seasonal variation of the North Pacific meridional overturning circulation (NPMOC) are analyzed based on the Simple Ocean Data Assimilation data and Argo profiling float data. The NPMOC displays a multi-cell structure with four cells in the North Pacific altogether. The TC and the STC are a strong clockwise meridional cell in the low latitude ocean and a weaker clockwise meridional cell between 7°N and 18°N, respectively, while the DTC and the subpolar cell are a weaker anticlockwise meridional cell between 3°N and 15°N and a weakest anticlockwise meridional cell between 35°N and 50°N, respectively.
The DTC, the TC and the STC are all of very strong seasonal variations. As to the DTC, the southward transport is strongest in fall and weakest in spring. For the TC, the northward transport is strongest in winter and weakest in spring, while the southward transport is strongest in fall and weakest in spring, which is associated with the strong southward flow of the DTC in fall. As the STC, the northward transport is strongest in winter and weakest in summer, while the southward transport is strongest in summer and weakest in spring. This seasonal difference may be associated with the DTC. The zonal wind stress and the east-west slope of sea level play important roles in the seasonal variations of the TC, the STC and the DTC. |
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