| 台风“康森”产生的海洋近惯性能量的数值模拟研究 |
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| 引用本文： | 李娟,刘军亮,蔡树群.台风“康森”产生的海洋近惯性能量的数值模拟研究[J].热带海洋学报,2020,39(2):35-43. |
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| 作者姓名： | 李娟 刘军亮 蔡树群 |
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| 作者单位： | 1. 热带海洋环境国家重点实验室(中国科学院南海海洋研究所), 广东 广州 510301;2. 中国科学院大学, 北京 100049;3. 南方海洋科学与工程广东省实验室(广州), 广东 广州 511458;4. 中国科学院南海生态环境工程创新研究院, 广东 广州 510301; |
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| 基金项目： | 中国科学院前沿科学重点研究计划(QYZDJ-SSW-DQC034);国家自然科学基金项目(41890851、41430964、41521005、41776005、41406023、41476011);中国科学院南海生态环境工程创新研究院项目(ISEE2018PY05);南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项(GML2019ZD0304) |
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| 摘 要： | 文章利用经验台风风场模型(TCWPM)和美国环境预测中心的气候预测系统再分析风场资料(NCEP/CFSR)对台风“康森(Conson)”进行数值模拟, 并将模拟的台风带入平板模式(slab model)模拟台风产生的海洋近惯性流。对比实测数据表明, 模拟结果与真实风场、近惯性流场均比较一致, 台风“康森”在近海面的风场不对称结构非常明显, 台风中心两侧的速度大小相差可达10m·s-1。台风“康森”在台风中心后方产生强烈的海洋近惯性振荡, 且持续时间超过4d。海洋近惯性动能沿着台风路径呈显著的不对称分布, 表明台风“康森”在共振作用下主要在路径右侧激发强烈的近惯性振荡。研究不同强度的热带气旋产生的海洋近惯性能量, 发现热带风暴产生的海洋近惯性能量较小, 平均近惯性动能不超过35J·m-3。随着气旋强度的增大, 热带气旋激发的近惯性能量呈指数增长, 而台风的影响面积与最大风速半径的变化相对比较一致, 当最大风速半径(R0)增大一半(1.5R0)时, 其产生的最大平均近惯性动能从81J·m-3增大到631J·m-3, 影响面积从大约600km2增加到大于900km2。
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| 关 键 词： | 台风“康森” 近惯性动能 数值模拟 南海 |
| 收稿时间： | 2019-08-16 |
| 修稿时间： | 2019-09-25 |
Numerical simulation of oceanic near-inertial energy induced by Typhoon Conson |
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| Juan Li,Junliang Liu,Shuqun Cai.Numerical simulation of oceanic near-inertial energy induced by Typhoon Conson[J].Journal of Tropical Oceanography,2020,39(2):35-43. |
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| Authors: | Juan Li Junliang Liu Shuqun Cai |
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| Institution: | 1. State Key Laboratory of Tropical Oceanography (South China Sea Institute of Oceanology, Chinese Academy of Sciences), Guangzhou 510301, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou 511458, China;4. Institution of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou 510301, China; |
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| Abstract: | A Tropical Cyclone Wind Profile Model (TCWPM) and the NCEP/CFSR wind data are used to simulate Typhoon Conson, and a slab model is developed to simulate typhoon-induced oceanic near-inertial currents. The model results match well with both reanalysis data and in situ observations. Typhoon Conson presented a salient asymmetric wind field at the ocean surface, and the bias between the two sides of the wind field along the track reached up to 10 m·s-1. Typhoon Conson generated strong oceanic near-inertial oscillations (NIOs) after the typhoon center, which lasted for more than four days, and a significant asymmetric distribution of near-inertial kinetic energy (NIKE) indicates the strong NIOs are mainly triggered on the right-hand side of Typhoon Conson under the resonance effect. We also show that the tropical storm yields a small fraction of NIKE, e.g., the mean NIKE does not exceed 35 J·m-3, but the NIKE increases exponentially with the increasing radius of maximum wind speed (Rmax or R0), and the influence area increases linearly with Rmax, e.g., when Rmax increases from R0 to 1.5 R0, the NIKE rises from 81 to 631 J·m -3, and the influence area increases from 600 to more than 900 km2. |
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| Keywords: | typhoon Conson near-inertial kinetic energy (NIKE) numerical simulation South China Sea |
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