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| 黄海对台风“利奇马”响应的观测研究 |
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于博1,2, 葛勇1,2, 任殿军1,2, 冀承振1,2, 胡伟1,2
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1.国家海洋局北海预报中心, 山东 青岛 266061;2.山东省海洋生态环境与防灾减灾重点实验室, 山东 青岛 266061
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| 摘要: |
| 2019年8月台风“利奇马”经过黄海海域，对海洋环境产生重要影响，本文利用QF103和QF111浮标观测资料分析了黄海海洋对台风的响应。结果表明：受台风影响，海面温度明显下降，海面水温降幅可达5℃；海面生态要素响应明显，海洋表层盐度、叶绿素a质量浓度（简称叶绿素a浓度）、溶解氧质量浓度（简称溶解氧浓度）均有明显升高，盐度升高约0.6，叶绿素a浓度的最大值可达1.4 mg/m3，溶解氧浓度最大值超过7.9 mg/L。台风过境时的强风应力使表层流速明显增强，台风对海洋表层流的能量输入使得近惯性频带能量大幅增加，台风激发的近惯性流速最大振幅为0.15 m/s，在垂直方向上具有第一斜压模态的特征；在黄海海域近惯性振荡衰减的时间尺度约为2.2 d。 |
| 关键词: 台风“利奇马” 海面温度 叶绿素 近惯性振荡 |
| DOI：10.11759/hykx20200616001 |
| 分类号:P731 |
| 基金项目:国家重点研发计划项目（2016YFC1401205）；山东省海洋生态环境与防灾减灾重点实验室项目（201903） |
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| Observation of the Yellow Sea response to Typhoon Lekima |
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YU Bo1,2, GE Yong1,2, REN Dian-jun1,2, JI Cheng-zhen1,2, HU Wei1,2
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1.North China Sea Marine Forecasting Center of State Oceanic Administration, Qingdao 266061, China;2.Shandong Provincial Key Laboratory of Marine Ecological Environment and Disaster Prevention and Mitigation, Qingdao 266061, China
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| Abstract: |
| In August 2019, typhoon Lekima passed through the Yellow Sea, and the ocean response to typhoon was analyzed based on the data of the buoy QF103 and QF111. Affected by the typhoon, the sea surface temperature(SST) decreased significantly, and the SST decreased by up to 5℃. The response of sea surface ecological elements was obvious. The sea surface salinity, the concentration of chlorophyll a, and the concentration of dissolved oxygen all increased significantly. The salinity increased by about 0.6, the maximum concentration of chlorophyll a reached 1.4 mg/m3, and the maximum concentration of dissolved oxygen exceeded 7.9 mg/L. The current increased forced by strong wind stress during the transit of the typhoon, the energy of the near-inertial increased significantly because of the energy flux induced by typhoon, and the maximum amplitude of the near-inertial velocity inspired by the typhoon was 0.15 m/s. The near-inertial velocities were characterized by a first baroclinic mode vertically. In the Yellow Sea, the damped timescale of the inertial oscillations was only about 2.2 d. |
| Key words: Typhoon Lekima sea surface temperature chlorophyll inertial oscillations |