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A numerical study of Stokes drift and thermal effects on the oceanic mixed layer

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Acta Oceanologica Sinica 2020年第5期39卷 35-45页

作者： Xuewei Li Dongliang Zhao zhongshui zou Physical Oceanography Laboratory Ocean University of ChinaQingdao 266100China Ocean College Zhejiang UniversityZhoushan 316021China

This study explores the influence of Stokes drift and the thermal effects on the upper ocean bias which occurs in the summer with overestimated sea surface temperature(SST)and shallower mixed layer depth(MLD)using Mellor-Yamada turbulence closure scheme.The upper ocean thermal structures through Princeton ocean model are examined by experiments in the cases of idealized forcing and real observational situation.The results suggest that Stokes drift can generally enhance turbulence kinetic energy and deepen MLD either in summer or in winter.This effect will improve the simulation results in summer,but it will lead to much deeper MLD in winter compared to observational data.It is found that MLD can be correctly simulated by combining Stokes drift and the thermal effects of the cool skin layer and diurnal warm layer on the upper mixing layer.In the case of high shortwave radiation and weak wind speed,which usually occurs in summer,the heat absorbed from sun is blocked in the warm layer and prevented from being transferred downwards.As a result,the thermal effects in summer nearly has no influence on dynamic effect of Stokes drift that leads to deepening MLD.However,when the stratification is weak in winter,the thermal effects will counteract the dynamic effect of Stokes drift through enhancing the strength of stratification and suppress mixing impact.Therefore,the dynamic and thermal effects should be considered simultaneously in order to correctly simulate upper ocean thermal structures in both summer and winter.

关键词： mixed layer cool skin layer diurnal warm layer Stokes drift

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2023年海洋气象研究热点回眸

科技导报 2024年第1期42卷 124-135页

作者：王麟王东晓邱春华张广隶邹仲水胡湛戴潇铭杨桐席紫涵贺垠凯张微微张一廖喜扬姚凤朝孟峥中山大学海洋科学学院珠海519082 南方海洋科学与工程广东省实验室(珠海) 珠海519080

回顾了2022-2023年有关台风、海雾、季风、海气通量理论、海浪模拟、寒潮等海洋气象学研究进展和在此期间海洋气象观测技术的提升与发展。研究多关注于各类海洋与气象观测和模拟技术的提升,以及海洋气象灾害潜在致灾因子的形成和发展机... 详细信息

回顾了2022-2023年有关台风、海雾、季风、海气通量理论、海浪模拟、寒潮等海洋气象学研究进展和在此期间海洋气象观测技术的提升与发展。研究多关注于各类海洋与气象观测和模拟技术的提升,以及海洋气象灾害潜在致灾因子的形成和发展机理,例如近年来台风路径多变,快速发展的案例频发;季风、海雾、海浪、海气界面通量等的观测和发展机理研究、模式参数化改进是未来海洋气象学的重要研究方向,这些研究成果对海洋气象灾害的预测和预警提供一定的科学基础和应用价值。

关键词：海洋气象学海气相互作用海洋气象灾害

The oceanic responses to Typhoon Rananim on the East China Sea

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Acta Oceanologica Sinica 2020年第7期39卷 69-78页

作者： Dan Xu Zhiyuan Li Zhanhong Wan Zongfu Ren zhongshui zou Xiuyang Lv Shizhu Luo College of Civil Engineering and Architecture Zhejiang UniversityHangzhou 310058China Collegeof Hydraulic and Environmental Engineering Zhejiang University of Water Resources and Electric PowerHangzhou 310018China Ocean College Zhejiang UniversityZhoushan 316021China

Many typhoons pass through the East China Sea(ECS)and the oceanic responses to typhoons on the ECS shelf are very energetic.However,these responses are not well studied because of the complicated background oceanic environment.The sea surface temperature(SST)response to a severe Typhoon Rananim in August 2004 on the ECS shelf was observed by the merged cloud-penetrating microwave and infrared SST data.The observed SST response shows an extensive SST cooling with a maximum cooling of 3°C on the ECS shelf and the SST cooling lags the typhoon by about one day.A numerical model is designed to simulate the oceanic responses to Rananim.The numerical model reasonably simulates the observed SST response and thereby provides a more comprehensive investigation on the oceanic temperature and current responses.The simulation shows that Rananim deepens the ocean mix layer by more than 10 m on the ECS shelf and causes a cooling in the whole mixed layer.Both upwelling and entrainment are responsible for the cooling.Rananim significantly deforms the background Taiwan Warm Current on the ECS shelf and generates strong Ekman current at the surface.After the typhoon disappears,the surface current rotates clockwise and vertically,the current is featured by near inertial oscillation with upward propagating phase.

关键词： typhoon sea surface temperature numerical model mix layer near inertial oscillation

Tower-based observation of air-sea momentum flux:comparisons between onshore and offshore winds

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Acta Oceanologica Sinica 2020年第7期39卷 61-68页

作者： Maosheng Ye Shuang Li zhongshui zou Jinbao Song Hailun He Jian Huang Hongwei Yang Ocean College Zhejiang UniversityZhoushan 316021China State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China Guangzhou Institute of Tropical and Marine Meteorology China Meteorological AdministrationGuangzhou 510640China College of Mathematics and System Science Shandong University of Science and TechnologyQingdao 266590China

We investigate the air-sea momentum flux in the marine atmospheric boundary layer using a tower-based direct measurement method.First,we compare the collected data with previous observations,and the results are roughly consistent.Next,in the low-to-moderate winds,the exchange coefficients(or drag coefficients)deviate between onshore and offshore winds,which exhibits the influence of surface wave on the momentum flux.Furthermore,we use a surface-wave-involved parameterization scheme to explain the dependence of momentum flux on surface wave.The results consolidate the influence of surface wave on momentum flux on the one hand,and validate the surface-wave-involved parameterization scheme on the other hand.

关键词： air-sea momentum flux direct measurement method marine atmospheric boundary layer

Observational study of super typhoon Meranti (2016) using satellite, surface drifter, Argo float and reanalysis data

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Acta Oceanologica Sinica 2021年第1期40卷 70-84页

作者： Hui Chen Shuang Li Hailun He Jinbao Song Zheng Ling Anzhou Cao zhongshui zou Wenli Qiao Ocean College Zhejiang UniversityZhoushan 316021China State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China Key Laboratory of Coastal Resources and Environment in Continental and Deep Sea of Department of Education of Guangdong ProvinceGuangdong Ocean UniversityZhanjiang 524088China

The present work describes the basic features of super typhoon Meranti(2016)by multiple data sources.We mainly focus on the upper ocean response to Meranti using multiplatform satellites,in situ surface drifter and Argo floats,and compare the results with the widely used idealized wind vortex model and reanalysis datasets.The pre-existing meso-scale eddy provided a favor underlying surface boundary condition and also modulated the upper ocean response to Meranti.Results show that the maximum sea surface cooling was 2.0℃after Meranti.The satellite surface wind failed to capture the core structure of Meranti as the idealized wind vortex model deduced.According to the observation of sea surface drifters,the near-inertial currents were significantly enhanced during the passage of Meranti.The temperature and salinity profiles from Argo floats revealed both the mixed-layer extension and subsurface upwelling induced by Meranti.The comparison results show that the sea surface temperature and surface wind in the reanalysis datasets differs from those in remote sensing system.Sea surface cooling is similar in both satellite and in situ observation,and sea surface salinity response has a lower correlation with the precipitation rate.

关键词： super typhoon satellite data sea surface temperature surface wind

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低风速涌浪条件下浪致应力的研究

海洋学报 2021年第10期43卷 1-9页

作者：潘伟邹仲水宋金宝黄健浙江大学物理海洋研究所浙江舟山316021 中国气象局广州热带海洋气象研究所广东广州510640

本文基于2012年2月15日至5月8日的广东省茂名市附近海上铁塔实测数据,分析了海气边界层的湍流运动。结果证实,在涌浪条件下,协谱和Ogive曲线存在明显受涌浪影响的区域。本文进一步研究,发现浪致雷诺应力的正负符号变化与波龄相关,并给... 详细信息

本文基于2012年2月15日至5月8日的广东省茂名市附近海上铁塔实测数据,分析了海气边界层的湍流运动。结果证实,在涌浪条件下,协谱和Ogive曲线存在明显受涌浪影响的区域。本文进一步研究,发现浪致雷诺应力的正负符号变化与波龄相关,并给出了顺风向和侧风向浪致雷诺应力正负符号反转时波龄的统计分布。此外,本文基于协谱法提取了浪致雷诺应力τ_(swell),并与传统方法得到的浪致雷诺应力τ_(*swell)做比较。结果表明,整体上τ_(swell)比τ_(*swell)大2~3个量级,这意味着传统方法显著低估了涌浪的浪致雷诺应力,传统的浪致雷诺应力计算方法还有待改进。

关键词：涌浪浪致雷诺应力协谱 Ogive曲线

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基于SWAN模式的台风浪数值模拟初步研究

海洋湖沼通报 2017年第6期 1-10页

作者：陈雅雅邹仲水赵栋梁中国海洋大学海洋与大气学院山东青岛266100

利用CCMP风场和Holland经验风场模型,构建不同合成半径的合成风场。基于SWAN模式对2010年第13号强台风鲇鱼进行数值模拟,然后使用卫星数据验证模式风速和波高,结果表明模式结果与实测值吻合良好,并且100km合成半径的风场模拟结果最佳。... 详细信息

利用CCMP风场和Holland经验风场模型,构建不同合成半径的合成风场。基于SWAN模式对2010年第13号强台风鲇鱼进行数值模拟,然后使用卫星数据验证模式风速和波高,结果表明模式结果与实测值吻合良好,并且100km合成半径的风场模拟结果最佳。最后使用基于不同拖曳系数参数化方案的SWAN模型进行波高模拟,结果表明不同拖曳系数参数化方案造成的差异主要反映在大风区,新版本的SWAN41.01修正风能输入项后,波高模拟结果更加合理。

关键词：台风台风浪数值模拟 SWAN模式拖曳系数

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海-气界面动量通量的估计方法分析与应用

海洋学报 2014年第9期36卷 75-83页

作者：邹仲水赵栋梁黄健李水清马昕盛立芳中国海洋大学物理海洋教育部重点实验室山东青岛266003 中国海洋大学海洋环境学院山东青岛266100 中国气象局广州热带海洋气象研究所广东广州510080

首次将经验模态分解方法引入湍流稳定性分析,与传统的线性和滑动平均去势方法进行了比较,发现经验模态分解方法的去势效果最好。基于"南海平台通量观测计划"(FOPSCS)近两年的连续通量观测数据,得到了22 476个摩擦速度的估算值,结果表明... 详细信息

首次将经验模态分解方法引入湍流稳定性分析,与传统的线性和滑动平均去势方法进行了比较,发现经验模态分解方法的去势效果最好。基于"南海平台通量观测计划"(FOPSCS)近两年的连续通量观测数据,得到了22 476个摩擦速度的估算值,结果表明,当风速小于5m/s时,拖曳系数随风速增大而减小,而风速大于5m/s时,拖曳系数随风速增大而增大,两种情形分别反映了黏性表皮摩擦和波浪引起的形状阻力对海面风应力的贡献。同时发现短风区情形的拖曳系数大于长风区情形,说明波浪成长状态会对海-气界面动量交换产生影响。

关键词：拖曳系数块体公式去势方法摩擦速度

混凝土框架结构改造型式在海塘加固中的应用研究

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水利水电快报 2024年第1期45卷 52-57页

作者：杨望邹战军朱杰骅浙江中水工程技术有限公司浙江杭州310010

在浙江“海塘安澜工程”建设过程中,为了使海塘加固满足工程自身稳定性需求,同时兼顾对周边生态环境,提出了一种新型海塘改造形式——混凝土框架结构。结合浙江东部健跳塘提升改造工程,分析了结构作用机理,对工程稳定性进行了计算,并结... 详细信息

在浙江“海塘安澜工程”建设过程中,为了使海塘加固满足工程自身稳定性需求,同时兼顾对周边生态环境,提出了一种新型海塘改造形式——混凝土框架结构。结合浙江东部健跳塘提升改造工程,分析了结构作用机理,对工程稳定性进行了计算,并结合塘身沉降监测数据对混凝土框架结构的实际应用情况进行了研究。结果表明:混凝土框架结构稳定性及桩基受力满足要求,适用于软土环境工程;该结构形式安全稳定,能够减小工程建设对周边生态环境的影响。该结构改造形式可为海塘工程提供参考。

关键词：海塘加固混凝土框架结构淤泥质土稳定性计算桩身受力