| 摘要: |
| Stokes漂流对海洋上层温度变化具有重要影响。本文以"麦德姆（Matmo）"台风过程为例，基于浪流耦合模型，通过对比分析考虑和未考虑Stokes漂流的模拟结果，研究了台风过程中浪致Stokes漂流及其效应对海洋上层温度变化的影响。研究表明Stokes漂流及其效应与海浪大小的分布密切相关，海浪越大，Stokes漂流、Stokes输运和Ekman-Stokes数相对越大。Stokes漂流在台风过程中起降低海表面温度的作用，台风路径处的Stokes漂流及其效应较大，降温较明显，最大降温约2℃。产生降温的原因是Stokes漂流造成海表流场改变，以及Stokes输运引起海水辐散等作用加强了上下层海水质量和能量的交换。利用Argo资料进行验证，发现考虑了Stokes漂流作用的海洋上层温度模拟结果与Argo测量结果更接近。 |
| 关键词: 台风 海浪 Stokes漂流 海洋上层温度 |
| DOI：10.11693/hyhz20190600114 |
| 分类号:P731 |
| 基金项目:国家自然科学基金，41676014号。 |
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| NUMERICAL SIMULATION OF INFLUENCE OF WAVE-INDUCED STOKES DRIFT ON UPPER OCEAN TEMPERATURE DURING TYPHOON |
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SHI Jian1, ZHU Chao2, LIU Jing-Dong1, LIU Zhen-Yu1
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1.College of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101, China;2.Key Laboratory of Coastal Disaster and Defense, Ministry of Education, Hohai University, Nanjing 210098, China
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| Abstract: |
| The influence of Stokes drift on the temperature variation in the upper ocean is important. We investigated the course of typhoon Matmo of 2014. Based on a wave-current coupling model, the influence of wave-induced Stokes drift and its effect on the temperature variation in the upper ocean during the typhoon was simulated numerically and analyzed with or without considering the Stokes drift. It shows that Stokes drift and its effect are closely related to the distribution of waves. When waves were larger, Stokes drift, Stokes transport, and Ekman-Stokes number were larger. Stokes drift reduced sea surface temperature during the typhoon. Stokes drift and its effect at the path of the typhoon were large and the sea surface cooling was obvious. The maximum temperature drop was about 2℃, which was due to the change of current that caused by Stokes drift and the divergence of sea water caused by Stokes transport strengthen the exchange of mass and energy between the upper and lower layers in the ocean. It is found that the simulation results of upper ocean temperature considering the effect of Stokes drift are closer to the measurement results of Argo. |
| Key words: typhoon ocean wave Stokes drift upper ocean temperature |
