| LI Juan,LIU Junliang,CAI Shuqun,PAN Jiayi. 2015. The spatiotemporal variation of the wind-induced near-inertial energy flux in the mixed layer of the South China Sea. Acta Oceanologica Sinica, 34(1):66－72 |
| The spatiotemporal variation of the wind-induced near-inertial energy flux in the mixed layer of the South China Sea |
| 南海混合层近惯性能通量的时空变化 |
| Received:July 23, 2014 Revised:September 10, 2014 |
| DOI：10.1007/s13131-015-0597-8 |
| Key words:near-inertial energy flux mixed layer spatiotemporal variation slab model South China Sea |
| 中文关键词: 近惯性能通量 混合层 时空变化 slab模式 南海 |
| 基金项目:The Strategic Priority Research Program of the Chinese Academy of Sciences under contract No. XdA11020201; the National Basic Research Program of China under contract No. 2013CB956101; the Knowledge Innovation Program of the Chinese Academy of Sciences under contract No. SQ201302; the National Science Foundation Council Grant of China under contract Nos 41430964, 41406023 and 41025019; the Chinese Academy of Sciences/State Administration of Foreign Experts Affairs International Partnership Program for Creative Research Teams and General Research Fund of Hong Kong Research Grants Council under contract No. CUHK402912. |
| Author Name | Affiliation | E-mail | | LI Juan | State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
University of Chinese Academy of Sciences, Beijing 100049, China | | | LIU Junliang | State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China | | | CAI Shuqun | State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China | caisq@scsio.ac.cn | | PAN Jiayi | Institute of Earth and Space Information Science, Chinese University of Hong Kong, Hong Kong, China | |
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| Abstract: |
| On the basis of the QSCAT/NCEP blended wind data and simple ocean data assimilation (SOdA), the wind-induced near-inertial energy flux (NIEF) in the mixed layer of the South China Sea (SCS) is estimated by a slab model, and the model results are verified by observational data near the Xisha Islands in the SCS. Then, the spatial and temporal variations of the NIEF in the SCS are analyzed. It is found that, the monthly mean NIEF exhibits obvious spatial and temporal variabilities, i.e., it is large west of Luzon Island all the year, east of the Indo-China Peninsula all the year except in spring, and in the northern SCS from May to September. The large monthly mean NIEF in the first two zones may be affected by the large local wind stress curl whilst that in the last zone is probably due to the shallow mixed layer depth. Moreover, the monthly mean NIEF is relatively large in summer and autumn due to the passage of typhoons. The spatial mean NIEF in the mixed layer of the SCS is estimated to be about 1.25 mW/m2 and the total wind energy input from wind is approximately 4.4 GW. Furthermore, the interannual variability of the spatial monthly mean NIEF and the Niño3.4 index are negatively correlated. |
| 中文摘要: |
| 本文基于QuikSCAT /NCEP混合风场资料和SOdA资料, 利用经实测流场验证的slab模式来计算南海混合层的近惯性能通量, 进而剖析了南海混合层近惯性能通量的时空分布特征. 研究结果表明: 南海混合层近惯性能通量存在着显著的时空变化, 在吕宋岛西侧整年、中南半岛东侧的夏、秋、冬季以及南海北部的5至9月存在着一个高值区, 前两个海区可能是受当地较大的风应力旋度影响, 而南海北部则可能是由于该海域夏季前后浅薄的混合层影响;且由于台风的影响, 南海混合层月平均的近惯性能通量在夏秋季比较大. 南海混合层多年平均的近惯性能通量约为1.25 mW/m2, 近惯性能量约为4.4GW. 研究还表明, 南海混合层近惯性能通量月平均值与Niño3.4指数的年际变化呈负相关关系. |
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