| Sun Baonan,Lian Zhan,Yuan Yeli,Xu Haiyang. 2019. Seasonal variability of the wind-generated near-inertial energy flux in the South China Sea. Acta Oceanologica Sinica, 38(4):136－145 |
| Seasonal variability of the wind-generated near-inertial energy flux in the South China Sea |
| 南海风生近惯性能通量的敏感性分析 |
| Received:May 23, 2018 |
| DOI：10.1007/s13131-018-1338-6 |
| Key words:near-inertial energy flux mixed layer depth South China Sea typhoon |
| 中文关键词: 近惯性能量通量 混合层深度 敏感性分析 南海 台风影响 |
| 基金项目:The National Natural Science Foundation of China under contract No. 40976016; the Basic Scientific Fund for the National Public Research Institutes of China under contract No. GY0217Q06; the National Science and Technology Major Project of the Ministry of Science and Technology of China under contract No. 2018YFF01014100; the Natural Science Foundation of Shandong Province, China under contract No. ZR2015PD009. |
| Author Name | Affiliation | E-mail | | Sun Baonan | College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China
Key Laboratory of Marine Science and Numerical Modeling, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
Laboratory for Regional Oceanography and Numerical Modeling, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China | | | Lian Zhan | Key Laboratory of Marine Science and Numerical Modeling, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
Laboratory for Regional Oceanography and Numerical Modeling, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China | lianzhan@fio.org.cn | | Yuan Yeli | College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China
Key Laboratory of Marine Science and Numerical Modeling, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
Laboratory for Regional Oceanography and Numerical Modeling, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China | | | Xu Haiyang | Key Laboratory of Marine Science and Numerical Modeling, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China | |
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| Abstract: |
| After validated by the in-situ observation, the slab model is used to study the wind-generated near-inertial energy flux (NIEF) in the South China Sea (SCS) based on satellite-observed wind data, and its dependence on calculation methods and threshold criteria of the mixed layer depth (MLD) is investigated. Results illustrate that the total amount of NIEF in the SCS could be doubled if different threshold criteria of MLD are adopted. The NIEF calculated by the iteration and spectral solutions can lead to a discrepancy of 2.5 GW (1 GW=1×109 W). Results also indicate that the NIEF exhibits spatial and temporal variations, which are significant in the boreal autumn, and in the southern part of the SCS. Typhoons are an important generator of NIEF in the SCS, which could account for approximately 30% of the annual mean NIEF. In addition, deepening of the MLD due to strong winds could lead to a decrease of NIEF by approximately by 10%. We re-estimate the annual mean NIEF in the SCS, which is (10±4) GW and much larger than those reported in previous studies. |
| 中文摘要: |
| 有研究表明南海（SCS）的湍流混合率显著高于深海海洋，而风生的近惯性能量通量（NIEF）是其主要的能量来源。针对NIEF的计算方法，本文设计了一系列试验方案并分析了南海NIEF对不同计算方法中的各类参数的敏感性。结果表明，混合层深度（MLD）的定义对NIEF的量值影响明显，采用不同的MLD定义计算得到的NIEF最大值和最小值差值可达到后者的2倍以上。此外，在同样的MLD定义下，不同方法得到的NIEF在南海的差异可达2.5GW（1GW=1×109 W）。基于时空特征的分析表明，不同方法得到的NIEF在南海南部和北半球的秋冬季差异更为显著。经过诊断计算，我们证实了台风是南海NIEF的重要来源，其提供的NIEF约占年平均结果的30%。海表风场增强可导致MLD加深，随之引起的NIEF减小量约为年平均的10%。是否考虑台风和相应的MLD变化，不会影响NIEF对于不同计算方案的敏感性。本文最终重新估计了南海年平均NIEF值为10±4 GW，显示基于多方案多参数的统计平均结果显著大于以往研究采用单一计算方案所得到的数值。 |
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