Updated on 2025/04/14

Information

 

写真a

 
ONUKI YOHEI
 
Organization
Research Institute for Applied Mechanics Center for Oceanic and Atmospheric Research Assistant Professor
Interdisciplinary Graduate School of Engineering Sciences Department of Interdisciplinary Engineering Sciences（Concurrent）
Title
Assistant Professor
Contact information
メールアドレス
Profile
海洋内部波動を中心に、数理物理的視点から海洋・大気中で生じる地球流体現象の解明を目指している。 キーワード： 回転成層流体、トポロジー、乱流直接数値シミュレーション、物理光学、統計力学、弱非線形乱流
External link

Degree

  • Ph. D.

Research Interests・Research Keywords

  • Research theme： Mathematical modeling of the deep ocean environment: basic comprehension and prediction

    Keyword： Geophysical fluid dynamics, Ocean dynamics, Nonlinear mechanics, Internal wave, Turbulence

    Research period： 2017.4

Awards

  • 日本海洋学会 2024年度岡田賞

    2024.9   一般社団法人 日本海洋学会   外洋域の鉛直混合に関わる内部波共鳴現象の理論的・数値的研究

    大貫陽平

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    Award type：Award from Japanese society, conference, symposium, etc.  Country：Japan

  • 2nd International Symposium “Ocean Mixing Processes: Impact on Biogeochemistry, Climate and Ecosystem”, Poster presentation award

    2018.10   新学術領域研究（研究領域提案型）　領域番号4702 新海洋混合学  

  • 平成29年度 研究奨励賞

    2017.3   東京大学大学院理学系研究科   東京大学大学院理学系研究科地球惑星科学専攻における博士論文「Nonlinear wave dynamics associated with tidal dissipation in the ocean interior」を、特に優れた研究と認めたもの

  • 日本海洋学会2016年度秋季大会 若手優秀発表賞

    2016.9   日本海洋学会2016年度秋季大会実行委員会   日本海洋学会2016年度春季大会における一般講演「統計流体力学に基づく潮汐混合パラメタリゼーションの試み」を、特に優れた研究発表と認めたもの

  • 日本海洋学会2016年度春季大会 若手優秀発表賞

    2016.3   日本海洋学会2016年度春季大会実行委員会   日本海洋学会2016年度春季大会における一般講演「Parametric Subharmonic Instability の統一理論」を、特に優れた研究発表と認めたもの

  • 平成26年度 研究奨励賞

    2014.3   東京大学大学院理学系研究科   東京大学大学院理学系研究科地球惑星科学専攻における修士論文「海洋内部波の非線形相互作用に関する古典的理論の検証とその結果に基づく parametric subharmonic instability の物理機構の解明」を、特に優れた研究であると認めたもの

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Papers

  • Bulk-edge correspondence recovered in incompressible geophysical flows Reviewed International coauthorship

    Yohei Onuki, Antoine Venaille, Pierre Delplace

    Physical Review Research   6 ( 3 )   2024.8

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/PhysRevResearch.6.033161

    Repository Public URL： https://hdl.handle.net/2324/7337523

  • Dynamical large deviations for an inhomogeneous wave kinetic theory: linear wave scattering by a random medium Invited Reviewed International journal

    @Yohei Onuki, @Jules Guioth, @Freddy Bouchet

    Annales Henri Poincaré: A Journal of Theoretical and Mathematical Physics   25   1215 - 1259   2024.1

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    Language：English   Publishing type：Research paper (scientific journal)  

    The wave kinetic equation predicts the averaged temporal evolution of a continuous spectral density of waves either randomly interacting or scattered by the fine structure of a medium. In a wide range of systems, the wave kinetic equation is derived from a fundamental equation of wave motion, which is symmetric through time reversal. By contrast, the corresponding wave kinetic equations is time irreversible: Its solutions monotonically increase an entropy-like quantity. A similar paradox appears whenever one makes a mesoscopic description of the evolution of a very large number of microscopic degrees of freedom, the paradigmatic example being the kinetic theory of dilute gas molecules leading to the Boltzmann equation. Since Boltzmann, it has been understood that a probabilistic understanding solves the apparent paradox. More recently, it has been understood that the kinetic description itself, at a mesoscopic level, should not break time reversal symmetry (Bouchet in J Stat Phys 181(2):515-550, 2020). The time reversal symmetry remains a fundamental property of the mesoscopic stochastic process: Without external forcing, the path probabilities obey a detailed balance relation with respect to an equilibrium quasipotential. The proper theoretical or mathematical tool to derive fully this mesoscopic time reversal stochastic process is large deviation theory: A large deviation principle uncovers a time reversible field theory, characterized by a large deviation Hamiltonian, for which the deterministic wave kinetic equation appears as the most probable evolution. Its irreversibility appears as a consequence of an incomplete description, rather than as a consequence of the kinetic limit itself, or some related chaotic hypothesis. This paper follows Bouchet (J Stat Phys 181(2):515-550, 2020) and a series of other works that derive the large deviation Hamiltonians of the main classical kinetic theories, for instance, Guioth et al. (J Stat Phys 189(20):20, 2022) for homogeneous wave kinetics. We propose here a derivation of the large deviation principle in an inhomogeneous situation, for the linear scattering of waves by a weak random potential. This problem involves microscopic scales corresponding to the typical wavelengths and periods of the waves and mesoscopic ones which are the scales of spatial inhomogeneities in the spectral density of both the random scatterers and the wave spectrum, and the time needed for the random scatterers to alter the wave spectrum. The main assumption of the kinetic regime is a large separation of these microscopic and mesoscopic scales. For the sake of simplicity, we consider a generic model of wave scattering by weak disorder: the Schrödinger equation with a random potential. We derive the path large deviation principle for the local spectral density and discuss its main properties. We show that the mesoscopic process obeys a time reversal symmetry at the level of large deviations.

    DOI： doi.org/10.1007/s00023-023-01329-7

    Repository Public URL： https://hdl.handle.net/2324/7171752

  • Breaking of internal waves parametrically excited by ageostrophic anticyclonic instability Reviewed International journal

    @Yohei Onuki, @Sylvain Joubaud, @Thierry Dauxois

    Journal of Physical Oceanography   53 ( 6 )   1591 - 1613   2023.6

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    Language：English   Publishing type：Research paper (scientific journal)  

    A gradient-wind balanced flow with an elliptic streamline parametrically excites internal inertia-gravity waves through ageostrophic anticyclonic instability (AAI). This study numerically investigates the breaking of internal waves and the following turbulence generation resulting from the AAI. In our simulation, we periodically distort the calculation domain following the streamlines of an elliptic vortex and integrate the equations of motion using a Fourier spectral method. This technique enables us to exclude the overall structure of the large-scale vortex from the computation and concentrate on resolving the small-scale waves and turbulence. From a series of experiments, we identify two different scenarios of wave breaking conditioned on the magnitude of the instability growth rate scaled by the buoyancy frequency, λ/N. First, when λ/N ≳ 0.008, the primary wave amplitude excited by AAI quickly goes far beyond the overturning threshold and directly breaks. The resulting state is thus strongly nonlinear turbulence. Second, if λ/N ≲ 0.008, weak wave-wave interactions begin to redistribute energy across frequency space before the primary wave reaches a breaking limit. Then, after a sufficiently long time, the system approaches a Garrett-Munk-like stationary spectrum, in which wave breaking occurs at finer vertical scales. Throughout the experimental conditions, the growth and decay time scales of the primary wave energy are well correlated. However, since the primary wave amplitude reaches a prescribed limit in one scenario but not in the other, the energy dissipation rates exhibit two types of scaling properties. This scaling classification has similarities and differences with D’Asaro and Lien’s (2000) wave-turbulence transition model.

    DOI： doi.org/10.1175/JPO-D-22-0152.1

    Repository Public URL： https://hdl.handle.net/2324/7171750

  • From ray tracing to waves of topological origin in continuous media Reviewed International journal

    @Antoine Venaille, @Yohei Onuki, @Nicolas Perez, @Armand Leclerc

    SciPost Physics   14 ( 4 )   2023.4

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.21468/SciPostPhys.14.4.062

  • Irreversible energy extraction from negative temperature two-dimensional turbulence Reviewed International journal

    @Yohei Onuki

    Physical Review E   106   064131   2022.12

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/PhysRevE.106.064131

    Repository Public URL： https://hdl.handle.net/2324/7171751

  • Simulating turbulent mixing caused by local instability of internal gravity waves Reviewed International journal

    @Yohei Onuki, @Sylvain Joubaud, @Thierry Dauxois

    Journal of Fluid Mechanics   915   A77   2021.5

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1017/jfm.2021.119

    Repository Public URL： https://hdl.handle.net/2324/7171738

  • Quasi-local method of wave decomposition in a slowly varying medium Reviewed International journal

    @Yohei Onuki

    Journal of Fluid Mechanics   883   A56   2020.1

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    Language：English   Publishing type：Research paper (scientific journal)  

    The general asymptotic theory for wave propagation in a slowly varying medium, classically known as the Wentzel–Kramers–Brillouin–Jeffreys (WKBJ) approximation, is revisited here with the aim of constructing a new data diagnostic technique useful in atmospheric and oceanic sciences. Using the Wigner transform, a kind of mapping that associates a linear operator with a function, we analytically decompose a flow field into mutually independent wave signals. This method takes account of the variations in the polarisation relations, an eigenvector that represents the kinematic characteristics of each wave component, so as to project the variables onto their eigenspace quasi-locally. The temporal evolution of a specific mode signal obeys a single wave equation characterised by the dispersion relation that also incorporates the effect from the local gradient in the medium. Combining this method with transport theory and applying them to numerical simulation data, we can detect the transfer of energy or other conserved quantities associated with the propagation of each wave signal in a wide variety of situations.

    DOI： 10.1017/jfm.2019.825

    Other Link： https://doi.org/10.1017/jfm.2019.825

    Repository Public URL： https://hdl.handle.net/2324/7171735

  • Instabilities of Finite-Amplitude Internal Wave Beams Reviewed International journal

    @Yohei Onuki, @Yuki Tanaka

    Geophysical Research Letters   46 ( 13 )   7527 - 7535   2019.7

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    Language：English   Publishing type：Research paper (scientific journal)  

    Beam-like internal waves are commonly generated by tides in the ocean, but their dissipation processes that cause vertical mixing remain poorly understood. Previous studies examined small-amplitude beams to find that parametric subharmonic instability (PSI) induces latitude-dependent wave dissipation. Using a novel approach based on Floquet theory, this study analyzes the stability of finite-amplitude beams over a wide range of parameters. If beam amplitude is small, PSI is indeed the principal mode under the condition f∕𝜎 ≤ 0.5, where f is the Coriolis parameter and 𝜎 is the beam frequency, and the growth rate is maximum when equality holds. However, as beam amplitude is increased, instability arises even when f∕𝜎 > 0.5, but the location of maximum instability shifts toward lower f∕𝜎; thus, the latitudinal dependence of instability is significantly altered. Furthermore, the resulting energy spectrum is strongly Doppler shifted to higher frequencies, which therefore distinguishes this configuration from the common cases of PSI.

    DOI： 10.1029/2019GL082570

    Other Link： https://doi.org/10.1029/2019GL082570

  • Parametric subharmonic instability in a narrow-band wave spectrum Reviewed International journal

    @Yohei Onuki, @Toshiyuki Hibiya

    Journal of Fluid Mechanics   865   247 - 280   2019.4

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1017/jfm.2019.44

    Other Link： https://doi.org/10.1017/jfm.2019.44

    Repository Public URL： https://hdl.handle.net/2324/7171736

  • Decay Rates of Internal Tides Estimated by an Improved Wave-Wave Interaction Analysis Reviewed International journal

    @Yohei Onuki, @Toshiyuki Hibiya

    Journal of Physical Oceanography   48 ( 11 )   2689 - 2701   2018.11

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    Language：English   Publishing type：Research paper (scientific journal)  

    回転成層流体における波数空間内のエネルギーカスケード過程について、密度成層構造の空間変化や上下境界の影響を取り入れた形で、弱非線形乱流理論に基づく運動学的方程式の定式化を行った。これを用いて、海洋内部で潮汐によって励起された波動が非線形共鳴を経てエネルギーを失う割合を全球的に計算したところ、観測研究に整合する形で、中緯度海域に卓越したエネルギー損失率のピークを再現することに成功した。

    DOI： 10.1175/JPO-D-17-0278.1

    Other Link： https://journals.ametsoc.org/doi/full/10.1175/JPO-D-17-0278.1

  • Excitation mechanism of near-inertial waves in baroclinic tidal flow caused by parametric subharmonic instability Reviewed International journal

    @Yohei Onuki, @Toshiyuki Hibiya

    Ocean Dynamics   65 ( 1 )   107 - 113   2015.1

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1007/s10236-014-0789-3

  • 成層流体における小スケール不安定の非線形シミュレーション Invited

    大貫陽平

    数理解析研究所講究録   2286   74 - 82   2024.6

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    Authorship：Lead author,　Last author,　Corresponding author   Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

  • 有限振幅内部波ビームの不安定解析

    @大貫 陽平, @田中 祐希

    日本流体力学会 年会2019 講演論文集   2019.9

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    Language：Japanese   Publishing type：Research paper (other academic)  

  • 波動乱流理論を用いた海洋内部波の研究

    @大貫陽平

    数理解析研究所講究録   2016.4

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    Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

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Presentations

  • 外洋域の鉛直混合に関わる内部波共鳴現象の理論的・数値的研究 Invited

    大貫陽平

    日本海洋学会2024年度秋季大会   2024.9  一般社団法人 日本海洋学会

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    Event date： 2024.9

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：東京   Country：Japan  

    日本海洋学会 2024年度岡田賞 受賞記念講演

  • Breaking of internal waves simulated in a distorted domain model International conference

    Yohei Onuki

    14th International Workshop on Modeling the Ocean 2024  2024.6 

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    Event date： 2024.6

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Sapporo   Country：Japan  

  • Topological indices in rotating stratified fluid and bulk-edge correspondence International coauthorship International conference

    Yohei Onuki; Antoine Venaille; Pierre Delplace

    Japan Geoscience Union Meeting 2024  2024.5 

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    Event date： 2024.5

    Language：English   Presentation type：Poster presentation  

    Venue：Chiba   Country：Japan  

  • 慣性重力波のトポロジカル指数とバルク-エッジ対応

    @大貫 陽平, @Antoine Venaille, @Pierre Delplace

    日本海洋学会 2023年度 秋季大会  2023.9 

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    Event date： 2023.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：京都大学 吉田キャンパス   Country：Japan  

  • 回転成層流体のチャーン数とバルク-エッジ対応

    @大貫陽平, @Antoine Venaille, @Pierre Delplace

    日本流体力学会 年会2023  2023.9 

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    Event date： 2023.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京農工大学　小金井キャンパス   Country：Japan  

  • Breaking of internal waves parametrically excited by ageostrophic anticyclonic instability International conference

    @Yohei Onuki, @Sylvain Joubaud, @Thierry Dauxois

    14th European Fluid Mechanics Conference  2022.9 

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    Event date： 2022.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Megaron Athens International Conference Centre   Country：Greece  

  • シア流中に励起される内部重力波のスペクトル論的考察

    @大貫 陽平, @Antoine Venaille

    日本海洋学会2022年度秋季大会  2022.9 

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    Event date： 2022.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：Japan  

  • Simulating turbulent mixing caused by local instability of internal gravity waves International conference

    @Yohei Onuki, @Sylvain Joubaud, @Thierry Dauxois

    IX International Symposium on Stratified Flows  2022.8 

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    Event date： 2022.8 - 2022.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：University of Cambridge   Country：United Kingdom  

  • Breaking of internal waves parametrically excited by ageostrophic anticyclonic instability International conference

    @Yohei Onuki, @Sylvain Joubaud, @Thierry Dauxois

    Japan Geoscience Union Meeting 2022  2022.5 

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    Event date： 2022.5 - 2022.6

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Chiba   Country：Japan  

  • Breaking of internal waves parametrically excited by ageostrophic anticyclonic instability International conference

    @Yohei Onuki, @Sylvain Joubaud, @Thierry Dauxois

    Ocean Sciences Meeting  2022.3 

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    Event date： 2022.2 - 2022.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：United States  

  • 楕円渦の内部にパラメトリック励起される重力波の砕波シミュレーション

    @大貫 陽平, @Sylvain Joubaud, @Thierry Dauxois

    日本流体力学会年会 2021  2021.9 

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    Event date： 2021.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：Japan  

  • 楕円渦の内部にパラメトリック励起される重力波の砕波シミュレーション

    @大貫 陽平, @Sylvain Joubaud, @Thierry Dauxois

    日本海洋学会2021年度秋季大会  2021.9 

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    Event date： 2021.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：Japan  

  • Irreversible energy extraction from negative-temperature two-dimensional turbulence International conference

    @Yohei Onuki

    Japan Geoscience Union Meeting 2021  2021.6 

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    Event date： 2021.6

    Language：English   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：Japan  

    The formation and transition of patterns observed in various geophysical turbulent flows are commonly explained in terms of statistical mechanics. This study aims to extend the range of such a statistical mechanics theory by introducing a perhaps novel conceptual model. We consider an inviscid two-dimensional flow contained in a bounded domain, the shape of which is distorted by an externally imposed force. Unlike the usual fixed boundary cases, the flow energy within the domain is exchanged with the external system via pressure work through the moving lateral boundary. Concurrently, the flow field remains constrained by vorticity conservation. The vorticity equation expanded onto time-dependent Laplacian eigenfunctions and subsequently truncated at a finite number satisfies Liouville's theorem. Consequently, based on energy and enstrophy constraints, a grand-canonical ensemble (GCE) is defined with a negative or positive temperature. Beginning from the GCE, when the domain shape is distorted from one shape to another in a finite time, the Jarzynski equality is established. The pressure work performed on the system is thus related to the difference in the Helmholtz free energy. The direction of the inequality between the mean work and the free energy difference derived from the Jarzynski equality depends on the sign of the initial temperature. If the temperature is negative, the pressure work irreversibly extracts flow energy from the system. This result provides new insights into the unique thermodynamic characteristics of geophysical flows.

  • 内部重力波の局所不安定が引き起こす成層乱流の直接数値シミュレーション

    @大貫 陽平, @Sylvain Joubaud, @Thierry Dauxois

    第34回数値流体力学シンポジウム  2020.12 

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    Event date： 2020.12

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：Japan  

  • 負温度を持つ二次元乱流からの不可逆的エネルギー抽出

    @大貫 陽平

    日本海洋学会2020年度秋季大会  2020.11 

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    Event date： 2020.11

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：Japan  

  • Direct numerical simulation of stratified turbulence generated by local instability of internal gravity waves International conference

    @Yohei Onuki, @Sylvain Joubaud, @Thierry Dauxois

    JpGU - AGU Joint Meeting 2020  2020.7 

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    Event date： 2020.7

    Language：English   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：Japan  

    With the aim of assessing internal wave-driven mixing in the ocean, we develop a new technique for direct numerical simulations of stratified turbulence. Since the spatial scale of oceanic internal gravity waves is typically much larger than that of turbulence, fully incorporating both in a model would require a high computational cost, and is therefore out of our scope. Alternatively, we cut out a small domain periodically distorted by an unresolved large-scale internal wave and locally simulate the energy cascade to the smallest scales. In this model, even though the Froude number of the outer wave, Fr, is small such that density overturn or shear instability does not occur, a striped pattern of disturbance is exponentially amplified through a parametric subharmonic instability. When the disturbance amplitude grows sufficiently large, secondary instabilities arise and produce much smaller-scale fluctuations. Passing through these two stages, wave energy is transferred into turbulence energy and will be eventually dissipated. Different from the conventional scenarios of vertical shear-induced instabilities, a large part of turbulent potential energy is supplied from the outer wave and directly used for mixing. The mixing coefficient, a ratio between the dissipation rate of kinetic energy and that of available potential energy, is always greater than 0.5 and tends to increase with Fr. Although our results are mostly consistent with the recently proposed scaling relationship between the mixing coefficient and the turbulent Froude number, the values of mixing coefficient obtained here are larger by a factor of about two than previously reported.

  • Instabilities of finite-amplitude internal wave beams International conference

    @Yohei Onuki, @Yuki Tanaka

    Ocean Sciences Meeting 2020  2020.2 

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    Event date： 2020.2

    Language：English   Presentation type：Oral presentation (general)  

    Venue：サンディエゴ   Country：Japan  

  • 内部波の局所不安定による乱流励起の直接数値シミュレーション

    @大貫 陽平, @Sylvain Joubaud, @Thierry Dauxois

    日本海洋学会2019年度秋季大会  2019.9 

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    Event date： 2019.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：富山   Country：Japan  

  • 有限振幅内部波ビームの不安定解析

    @大貫 陽平, @田中 祐希

    日本流体力学会 年会2019  2019.9 

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    Event date： 2019.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京   Country：Japan  

  • モノドロミー行列の直接計算による内部波ビームの安定性解析

    @大貫 陽平

    日本海洋学会2018年度秋季大会  2018.9 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京   Country：Japan  

  • 内部潮汐流から近慣性流へエネルギーを輸送するPSIの増幅機構に関する理論的研究

    @大貫 陽平, @日比谷 紀之

    日本海洋学会2013年度春季大会  2013.3 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京   Country：Japan  

  • Excitation Mechanism of Near-inertial Currents in Baroclinic Tidal Flow Caused by Parametric Subharmonic Instability International conference

    @Yohei Onuki, @Toshiyuki Hibiya

    Asia Oceania Geosciences Society Annual 11th Meeting  2014.8 

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    Event date： 2019.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Sapporo   Country：Japan  

  • 遠方伝播する傾圧潮汐波の波動間相互作用による散逸過程

    @大貫 陽平, @日比谷 紀之

    日本海洋学会 2015年度春季大会  2015.3 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京   Country：Japan  

  • Estimates of the attenuation rates of baroclinic tidal waves caused by resonant interactions with the background internal wave continuum International conference

    @Yohei Onuki, @Toshiyuki Hibiya

    International Union of Geodesy and Geophysics 26th General Assembly  2015.6 

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    Event date： 2019.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Prague   Country：Czech Republic  

  • Estimates of the attenuation rates of baroclinic tidal energy caused by resonant interactions among internal waves based on the weak turbulence theory International conference

    @Yohei Onuki, @Toshiyuki Hibiya

    Ocean Sciences Meeting  2016.2 

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    Event date： 2019.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：New Orleans   Country：United States  

  • Parametric Subharmonic Instability の統一理論

    @大貫 陽平, @日比谷 紀之

    日本海洋学会2016年度春季大会  2016.3 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京   Country：Japan  

  • Geography of the attenuation rates of baroclinic tidal energy estimated using wave-wave interaction theory International conference

    @Yohei Onuki, @Toshiyuki Hibiya

    Japan Geoscience Union Meeting 2016  2016.5 

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    Event date： 2019.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Chiba   Country：Japan  

  • 統計流体力学に基づく潮汐混合パラメタリゼーションの試み

    @大貫 陽平, @日比谷 紀之

    日本海洋学会2016年度秋季大会  2016.9 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：鹿児島   Country：Japan  

  • Decay rates of internal tides estimated by an improved wave-wave interaction analysis International conference

    @Yohei Onuki, @Toshiyuki Hibiya

    Japan Geoscience Union Meeting 2018  2018.5 

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    Event date： 2019.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：幕張メッセ   Country：Japan  

  • 地球流体力学における研究ツールとしてのWigner変換

    @大貫 陽平

    日本気象学会2018年度春季大会  2018.5 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：つくば国際会議場   Country：Japan  

  • Decay rates of internal tides estimated by an improved wave-wave interaction analysis International conference

    @Yohei Onuki, @Toshiyuki Hibiya

    Ocean Mixing Gordon Research Conference  2018.6 

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    Event date： 2019.3

    Language：English   Presentation type：Oral presentation (general)  

    Country：United States  

  • Theoretical analysis of resonant interaction between internal tides and an internal wave continuum International conference

    @Yohei Onuki, @Toshiyuki Hibiya

    Ocean Sciences Meeting  2018.2 

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    Event date： 2018.2

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Oregon Convention Center   Country：United States  

  • 海洋力学における研究ツールとしてのWigner変換

    @大貫 陽平

    日本海洋学会2017年度秋季大会  2017.10 

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    Event date： 2017.10

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：宮城   Country：Japan  

  • Theoretical estimates of the intensity of resonant coupling between internal tides and internal waves in the western Pacific International conference

    @Yohei Onuki, @Toshiyuki Hibiya

    The 19th Pacific-Asian Marginal Seas (PAMS) Meeting  2017.4 

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    Event date： 2017.4

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Seogwipo KAL Hotel   Country：Korea, Republic of  

  • 地球流体波動に対する現代物理学的アプローチ

    大貫陽平

    地球環境グループ附置研プロジェクト報告会   2025.3  九州大学応用力学研究所

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    Event date： 2025.3

    Language：Japanese  

    Venue：春日   Country：Japan  

  • 回転成層流体のトポロジカル指数とバルク-エッジ対応

    大貫陽平

    地球流体における波動と対流現象の力学  2025.3  九州大学応用力学研究所

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    Event date： 2025.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：春日   Country：Japan  

  • 成層流体における小スケール不安定の非線形シミュレーション

    大貫陽平

    非線形プラズマ科学研究集会  2024.12  九州大学応用力学研究所

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    Event date： 2024.12

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：春日   Country：Japan  

  • 成層流体における小スケール不安定の非線形シミュレーション Invited

    大貫陽平

    海洋の統合的理解に向けた新時代の力学理論の構築  2024.10  北海道大学低温科学研究所

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    Event date： 2024.10

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：札幌   Country：Japan  

  • 鉛直シア流の存在下における内部潮汐の励起

    @大貫 陽平, @Antoine Venaille

    地球流体にみられる多様な現象に伴う流れの形成の力学  2024.3 

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    Event date： 2024.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京大学 大気海洋研究所   Country：Japan  

  • 地球流体研究の国際展開

    @大貫 陽平

    附置研「大気海洋研究」プロジェクト報告会  2024.2 

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    Event date： 2024.2

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：九州大学 応用力学研究所   Country：Japan  

  • 背景シア流の存在下における内部波の励起

    @大貫 陽平, @Antoine Venaille

    海洋乱流の観測およびモデリングに関する研究集会  2023.12 

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    Event date： 2023.12

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：北海道大学 低温科学研究所   Country：Japan  

  • 回転成層流体のトポロジカル指数とバルク-エッジ対応

    @大貫 陽平, @Antoine Venaille, @Pierre Delplace

    研究集会： 海洋の統合的理解に向けた新時代の力学理論の構築  2023.11 

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    Event date： 2023.11

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：北海道大学 低温科学研究所   Country：Japan  

  • 回転成層流体のトポロジカル指数とバルク-エッジ対応

    @大貫 陽平, @Antoine Venaille, @Pierre Delplace

    九州大学応用力学研究所共同利用研究 「微細規模から惑星規模にかけての海洋力学過程と規模間相互作用の研究」研究集会  2023.10 

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    Event date： 2023.10

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：九重共同研修所・山の家   Country：Japan  

  • 成層流体における小スケール不安定の非線形シミュレーション Invited

    @大貫 陽平

    京都大学数理解析研究所 RIMS 共同研究（公開型） 「非線形波動現象の数理とその応用」  2023.10 

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    Event date： 2023.10

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：京都大学 数理解析研究所   Country：Japan  

  • Internal tide generation in shear flow International conference

    @Yohei Onuki, @Antoine Venaille

    Singularities and Attractors in rotating and stratified fluids  2022.12 

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    Event date： 2022.12

    Language：English   Presentation type：Oral presentation (general)  

    Venue：IRPHE, Marseille   Country：France  

  • Large deviations for waves scattered in random media Invited International conference

    @Yohei Onuki, @Jules Guioth, @Freddy Bouchet

    2022 Simons Collaboration on Wave Turbulence Annual Meeting  2022.11 

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    Event date： 2022.11 - 2022.12

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Online   Country：France  

  • 鉛直シア流の存在下における内部潮汐の励起

    @大貫陽平, @Antoine Venaille

    九州大学応用力学研究所共同利用研究 「微細規模から惑星規模にかけての海洋力学過程と規模間相互作用の研究」研究会  2022.11 

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    Event date： 2022.11

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：Japan  

  • Simulating turbulent mixing caused by local instability of internal gravity waves Invited International conference

    @Yohei Onuki, @Sylvain Joubaud, @Thierry Dauxois

    Fluid Weekly Seminar at International Center for Theoretical Sciences  2022.10 

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    Event date： 2022.10

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Online   Country：India  

  • グリーン関数による全球海洋モデルの最適化

    #谷口 勝平, @広瀬 直毅, @劉 天然, @大貫 陽平

    日本海洋学会2022年度秋季大会  2022.9 

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    Event date： 2022.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Country：Japan  

  • Breaking of internal waves parametrically excited by ageostrophic anticyclonic instability Invited International conference

    @Yohei Onuki, @Sylvain Joubaud, @Thierry Dauxois

    INTERNATIONAL SYMPOSIUM ON GEOPHYSICAL FLOWS  2022.8 

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    Event date： 2022.8

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Indian Institute of Technology Madras   Country：India  

  • Breaking of internal waves parametrically excited by ageostrophic anticyclonic instability International conference

    @Yohei Onuki, Sylvain Joubaud, Thierry Dauxois

    Wave, instabilities and mixing in rotating and stratified flows (ICTS meeting)  2022.4 

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    Event date： 2022.4

    Language：English   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：India  

  • 波動間相互作用による内部潮汐の減衰

    @大貫陽平

    海洋波および大気海洋相互作用に関するワークショップ  2022.3 

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    Event date： 2022.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：Japan  

  • 地球科学における流体物理研究の国際展開

    @大貫 陽平

    地球環境グループ 附置研プロジェクト報告会  2022.2 

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    Event date： 2022.2

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：Japan  

  • 流体波動の局所分離と不安定解析に関する研究

    @大貫 陽平

    波・流れ・乱流のセンシング・マイニング・モデリング  2022.2 

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    Event date： 2022.2

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：Japan  

  • Ageostrophic anticyclonic instability が励起する内部波の砕波シミュレーション

    @大貫 陽平, @Sylvain Joubaud, @Thierry Dauxois

    海洋乱流に関する観測およびモデリング研究集会  2021.11 

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    Event date： 2021.11

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：名古屋大学, オンライン   Country：Japan  

  • Ageostrophic anticyclonic instability によって励起される重力波の砕波シミュレーション

    @大貫 陽平, @Sylvain Joubaud, @Thierry Dauxois

    微細規模から惑星規模にかけての海洋力学過程と規模間相互作用の研究  2021.11 

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    Event date： 2021.11

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：九州大学応用力学研究所, オンライン   Country：Japan  

  • Simulating turbulent mixing caused by local instability of internal gravity waves International conference

    @Yohei Onuki, @Sylvain Joubaud, @Thierry Dauxois

    Projet ANR DisET (02/2018 – 07/2022) Réunion #4  2021.10 

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    Event date： 2021.10

    Language：English   Presentation type：Symposium, workshop panel (public)  

    Venue：Laboratoire de Physique, ENS de Lyon   Country：France  

  • Simulating turbulent mixing caused by local instability of internal gravity waves Invited International conference

    @Yohei Onuki, @Sylvain Joubaud, @Thierry Dauxois

    TRR seminar  2021.5 

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    Event date： 2021.5

    Language：English   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

    Venue：オンライン   Country：Germany  

  • Wigner変換を用いた流体波動の局所分離解析 Invited

    @大貫 陽平

    地球流体セミナー  2021.2 

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    Event date： 2021.2

    Language：Japanese   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

    Venue：オンライン   Country：Japan  

  • 変形領域における二次元乱流の統計力学

    @大貫 陽平

    微細規模から惑星規模にかけての海洋力学過程と規模間相互作用の研究  2020.12 

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    Event date： 2020.12

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：九州大学応用力学研究所   Country：Japan  

  • 変形領域における⼆次元乱流の統計⼒学

    @大貫陽平

    海洋乱流に関する観測およびモデリング研究集会  2020.10 

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    Event date： 2020.10

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：Japan  

  • 潮汐混合ホットスポットの形成に関わる内部波共鳴現象の解明

    @大貫 陽平

    新学術領域「新海洋混合学」全体会議  2020.5 

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    Event date： 2020.5

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：Japan  

  • 深海乱流の再現に特化した領域変形スペクトルモデルの開発

    @大貫 陽平

    地球環境グループ 附置研プロジェクト報告会  2020.2 

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    Event date： 2020.2

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：福岡   Country：Japan  

  • 流体波動の局所分離解析に関する研究

    @大貫 陽平

    応用力学研究所研究集会 “波・流れ・乱流のセンシング・マイニング・モデリング”  2020.2 

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    Event date： 2020.2

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：福岡   Country：Japan  

  • Quasi-local method of wave decomposition in a slowly varying medium International conference

    @Yohei Onuki

    The 16th Japan-Korea Joint Seminar on Ocean Sciences  2020.1 

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    Event date： 2020.1

    Language：English   Presentation type：Oral presentation (general)  

    Venue：宮崎   Country：Japan  

  • 変形領域モデルを用いた成層乱流の直接数値シミュレーション

    @大貫 陽平, @Sylvain Joubaud, @Thierry Dauxois

    海洋乱流の観測およびモデリングに関する研究集会  2019.11 

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    Event date： 2019.11

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：千葉   Country：Japan  

  • 変形領域モデルを用いた成層乱流の直接数値シミュレーション

    @大貫 陽平, @Sylvain Joubaud, @Thierry Dauxois

    微細規模から惑星規模にかけての海洋力学過程と規模間相互作用の研究  2019.10 

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    Event date： 2019.10

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：大分   Country：Japan  

  • 内部波が引き起こす乱流混合の直接数値シミュレーション

    @大貫 陽平, @Sylvain Joubaud, @Thierry Dauxois

    第4回 新海洋混合学 OMIX YMR サマースクール  2019.8 

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    Event date： 2019.8

    Language：Japanese   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

    Venue：浜松   Country：Japan  

  • 大気や海洋に見られる各種波動の局所分離と分布関数計算 Invited

    @大貫 陽平

    九州大学応用力学研究所 RIAM フォーラム 2019  2019.6 

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    Event date： 2019.6

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：福岡   Country：Japan  

  • Instabilities of finite-amplitude internal wave beams International conference

    @Yohei Onuki, @Yuki Tanaka

    Japan Geoscience Union Meeting 2019  2019.5 

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    Event date： 2019.5

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Makuhari   Country：Japan  

  • Instabilities of finite-amplitude internal wave beams International conference

    @Yohei Onuki, @Yuki Tanaka

    3rd International Symposium “Ocean Mixing Processes: Impact on Biogeochemistry, Climate and Ecosystem”  2019.5 

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    Event date： 2019.5

    Language：English   Presentation type：Symposium, workshop panel (public)  

    Venue：Tokyo   Country：Japan  

  • Instabilities of finite-amplitude internal wave beams International conference

    @Yohei Onuki, @Yuki Tanaka

    Seminar at ENS de Lyon  2019.3 

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    Event date： 2019.3

    Language：English   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

    Venue：Lyon   Country：France  

  • LESを用いた境界層日変化の再現と物質拡散及び雲に関する研究

    @澁谷 亮輔, @大貫 陽平, @後藤 裕, @高麗 正史, @中西 幹郎, @小池 真, @佐藤 薫

    日本気象学会2012年度春季大会  2012.5 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：茨城   Country：Japan  

  • parametric subharmonic instabilityの物理機構の解明

    @大貫 陽平

    海洋若手会夏の学校  2014.8 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：静岡   Country：Japan  

  • 深海に奏でる非線形共鳴のダイナミクス

    @大貫 陽平

    海洋若手会夏の学校  2015.8 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：千葉   Country：Japan  

  • 波動乱流理論を用いた傾圧潮汐の減衰率解析

    @大貫 陽平

    九州大学応用力学研究所 研究集会 海洋大循環の力学-エクマン層から中深層循環迄  2015.11 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：長崎   Country：Japan  

  • 波動乱流理論を用いた海洋内部波の研究

    @大貫 陽平

    京都大学数理解析研究所 研究集会 非線形波動現象の数理に関する最近の進展  2015.10 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：京都   Country：Japan  

  • Effects of phase modulation on parametric instability of oceanic internal waves International conference

    @Yohei Onuki

    Waseda Workshop on Theoretical and Computational Methods of Nonlinear Water Waves; An Introduction to the Mathematical Theory of Nonlinear Water Waves  2016.5 

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    Event date： 2019.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Tokyo   Country：Japan  

  • 海洋内部波動の統計力学 - 共鳴現象における動力学と運動学 -

    @大貫 陽平

    夏のGFDセミナー2016  2016.8 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：北海道   Country：Japan  

  • 海洋内部領域での潮汐散逸に関わる非線形波動力学の研究

    @大貫 陽平, @日比谷 紀之

    海洋乱流研究会  2017.1 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：福岡   Country：Japan  

  • 海洋力学における研究ツールとしてのWigner変換

    @大貫 陽平

    海洋力学理論の研究集会  2017.6 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：福岡   Country：Japan  

  • 海洋物理現象に対する統計力学的アプローチ

    @大貫 陽平

    RIAMフォーラム  2017.6 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：福岡   Country：Japan  

  • 海洋内部における波動スペクトルの形成とエネルギー伝達機構

    @大貫 陽平

    海洋とプラズマにおける乱流理論 -類似性と共通性-  2017.6 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：福岡   Country：Japan  

  • 波活動度の一般解析アルゴリズム

    @大貫 陽平

    夏のGFDセミナー  2017.8 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：北海道   Country：Japan  

  • 波動フラックスの一般解析アルゴリズム

    @大貫 陽平

    海洋大循環の力学-エクマン層から中深層循環まで  2017.10 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：大分   Country：Japan  

  • 波動フラックスの一般解析アルゴリズム

    @大貫 陽平

    大気海洋相互作用に関する研究集会  2017.11 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：京都   Country：Japan  

  • 波動フラックスの一般解析アルゴリズム

    @大貫 陽平

    地球環境グループ 附置研プロジェクト報告会  2018.2 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：福岡   Country：Japan  

  • 弱非線形乱流の理論的基礎とPSIへの応用

    @大貫 陽平

    海洋乱流の観測およびモデリングに関する研究集会  2018.3 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：福岡   Country：Japan  

  • 狭域スペクトル中のパラメトリック不安定

    @大貫 陽平

    海洋波および大気海洋相互作用に関するワークショップ  2018.3 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：愛知   Country：Japan  

  • Quasi-local method of wave decomposition in a slowly varying medium International conference

    @Yohei Onuki

    Seminar at Applied Physics Laboratory  2018.6 

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    Event date： 2019.3

    Language：English   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

    Venue：Seattle   Country：United States  

  • Decay rates of internal tides estimated by an improved wave-wave interaction analysis International conference

    @Yohei Onuki, @Toshiyuki Hibiya

    Woods Hole Oceanographic Institution Physical Oceanography Seminar  2018.6 

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    Event date： 2019.3

    Language：English   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

    Venue：Woods Hole   Country：United States  

  • 流体中における波動伝搬の一般解析アルゴリズム

    @大貫 陽平

    研究集会 「宗谷暖流を始めとした対馬暖流系の変動メカニズム」  2018.7 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：北海道   Country：Japan  

  • On the stability of internal wave beam International conference

    @Yohei Onuki

    The 15th Korea-Japan (Japan-Korea) Joint Seminar in the Ocean and the Atmosphere  2018.8 

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    Event date： 2019.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Jeju   Country：Korea, Republic of  

  • 地衡流中における近慣性波の発生と伝搬に関する数値実験

    #西元 拓也, @大貫 陽平

    日本海洋学会2018年度秋季大会  2018.9 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京   Country：Japan  

  • Generation and propagation of near-inertial waves in a geostrophic flow field International conference

    #Takuya Nishimoto, @Yohei Onuki

    The 15th Korea-Japan (Japan-Korea) Joint Seminar in the Ocean and the Atmosphere  2018.9 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：Jeju   Country：Korea, Republic of  

  • モノドロミー行列の直接計算による内部波ビームの安定性解析

    @大貫 陽平

    海洋力学理論の研究集会  2018.9 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：福岡   Country：Japan  

  • 内部波ビームのパラメトリック不安定

    @大貫 陽平

    海洋乱流の観測およびモデリングに関する研究集会  2018.11 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：千葉   Country：Japan  

  • モノドロミー行列の直接計算による内部波ビームの安定性解析

    @大貫 陽平

    微細規模から惑星規模にかけての海洋力学過程と規模間相互作用の研究  2018.11 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：大分   Country：Japan  

  • Decay rates of internal tides estimated by an improved wave-wave interaction analysis International conference

    @Yohei Onuki, @Toshiyuki Hibiya

    2nd International Symposium “Ocean Mixing Processes: Impact on Biogeochemistry, Climate and Ecosystem”  2018.11 

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    Event date： 2019.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：千葉   Country：Japan  

  • Recent progress in the resonant interaction theory of oceanic internal waves International conference

    @Yohei Onuki, @Toshiyuki Hibiya

    Seminar at Hamburg University  2019.2 

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    Event date： 2019.3

    Language：English   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

    Venue：Hamburg   Country：Germany  

  • 潮汐混合ホットスポットの形成に関わる内部波共鳴現象の解明

    @大貫 陽平

    新学術領域「新海洋混合学」全体会議  2019.3 

    　More details

    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：北海道   Country：Japan  

  • 流体波動の局所分離解析に関する研究

    @大貫 陽平

    応用力学研究所研究集会 “波・流れ・乱流のセンシング・マイニング・モデリング"  2019.1 

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    Event date： 2019.1 - 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：福岡   Country：Japan  

  • Breaking of internal waves parametrically excited by ageostrophic anticyclonic instability Invited International conference

    @Yohei Onuki, @Sylvain Joubaud, @Thierry Dauxois

    Seminar at Laboratoire de Mécanique des Fluides et d'Acoustique, École Centrale de Lyon  2023.1 

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    Language：English   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

    Venue：Laboratoire de Mécanique des Fluides et d'Acoustique, École Centrale de Lyon   Country：France  

  • Breaking of internal waves parametrically excited by ageostrophic anticyclonic instability International conference

    @Yohei Onuki, @Sylvain Joubaud, @Thierry Dauxois

    Eddies and Waves: Theory, Models, and Observations  2023.2 

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    Language：English   Presentation type：Oral presentation (general)  

    Venue：Hamburg   Country：Germany  

  • Dynamical large deviations for a kinetic theory of linear wave scattering by a random medium Invited International conference

    @Yohei Onuki, @Jules Guioth, @Freddy Bouchet

    JHU/Lyon Turbulence Seminar  2023.3 

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    Language：English   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

    Venue：Online   Country：France  

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Professional Memberships

  • 日本海洋学会

  • Japan Geoscience Union

Academic Activities

  • Screening of academic papers

    Role(s)： Peer review

    2024

    　More details

    Type：Peer review 

    Number of peer-reviewed articles in foreign language journals：1

    Number of peer-reviewed articles in Japanese journals：0

    Proceedings of International Conference Number of peer-reviewed papers：0

    Proceedings of domestic conference Number of peer-reviewed papers：0

  • Chair International contribution

    Eddies and Waves: Theory, Models, and Observations  （ Hamburg Germany ） 2023.2

    　More details

    Type：Competition, symposium, etc. 

  • Screening of academic papers

    Role(s)： Peer review

    2023

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    Type：Peer review 

    Number of peer-reviewed articles in foreign language journals：2

  • Chair International contribution

    IX International Symposium on Stratified Flows Department of Applied Mathematics and Theoretical Physics  （ University of Cambridge UnitedKingdom ） 2022.8 - 2022.9

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    Type：Competition, symposium, etc. 

  • Screening of academic papers

    Role(s)： Peer review

    2022

    　More details

    Type：Peer review 

    Number of peer-reviewed articles in foreign language journals：4

    Number of peer-reviewed articles in Japanese journals：0

    Proceedings of International Conference Number of peer-reviewed papers：0

    Proceedings of domestic conference Number of peer-reviewed papers：0

  • 座長

    日本海洋学会 2021年度秋季大会  （ Japan ） 2021.9

    　More details

    Type：Competition, symposium, etc. 

  • Screening of academic papers

    Role(s)： Peer review

    2021

    　More details

    Type：Peer review 

    Number of peer-reviewed articles in foreign language journals：2

    Number of peer-reviewed articles in Japanese journals：1

    Proceedings of International Conference Number of peer-reviewed papers：0

    Proceedings of domestic conference Number of peer-reviewed papers：0

  • 座長

    日本海洋学会 2020年度秋季大会  （ Japan ） 2020.11

    　More details

    Type：Competition, symposium, etc. 

  • Screening of academic papers

    Role(s)： Peer review

    2020

    　More details

    Type：Peer review 

    Number of peer-reviewed articles in foreign language journals：3

    Number of peer-reviewed articles in Japanese journals：0

    Proceedings of International Conference Number of peer-reviewed papers：0

    Proceedings of domestic conference Number of peer-reviewed papers：0

  • 世話人

    新海洋混合学OMIX若手会サマースクール  （ Japan ） 2019.8

    　More details

    Type：Competition, symposium, etc. 

  • Screening of academic papers

    Role(s)： Peer review

    2019

    　More details

    Type：Peer review 

    Number of peer-reviewed articles in foreign language journals：5

    Number of peer-reviewed articles in Japanese journals：0

    Proceedings of International Conference Number of peer-reviewed papers：0

    Proceedings of domestic conference Number of peer-reviewed papers：0

  • 座長 International contribution

    The 15th Korea-Japan (Japan-Korea) Joint Seminar in the Ocean and the Atmosphere  （ Jeju Korea ） 2018.9

    　More details

    Type：Competition, symposium, etc. 

  • Screening of academic papers

    Role(s)： Peer review

    2018

    　More details

    Type：Peer review 

    Number of peer-reviewed articles in foreign language journals：0

    Number of peer-reviewed articles in Japanese journals：0

    Proceedings of International Conference Number of peer-reviewed papers：0

    Proceedings of domestic conference Number of peer-reviewed papers：0

  • Screening of academic papers

    Role(s)： Peer review

    2017

    　More details

    Type：Peer review 

    Number of peer-reviewed articles in foreign language journals：1

    Number of peer-reviewed articles in Japanese journals：0

    Proceedings of International Conference Number of peer-reviewed papers：0

    Proceedings of domestic conference Number of peer-reviewed papers：0

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Research Projects

  • Small-scale instabilities in rotating and stratified fluid

    2023.4 - 2024.3

    Joint research

    　 More details

    Authorship：Coinvestigator(s)  Grant type：Other funds from industry-academia collaboration

  • Triadic resonant instability of internal gravity waves in a stratified shear flow

    2023.4 - 2024.3

    Joint research

    　 More details

    Authorship：Coinvestigator(s)  Grant type：Other funds from industry-academia collaboration

  • データ駆動科学的手法を用いた非平衡開放系の時空間ダイナミクス研究

    2022.4 - 2025.3

    九州大学(日本) 

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    Authorship：Collaborating Investigator(s) (not designated on Grant-in-Aid) 

  • Nonlinear energy transfer within the oceanic internal wave field

    2022.4 - 2024.3

    Joint research

    　 More details

    Authorship：Coinvestigator(s)  Grant type：Other funds from industry-academia collaboration

  • Quasi-resonance phenomena in geophysical waves

    2022.4 - 2024.3

    Joint research

    　 More details

    Authorship：Coinvestigator(s)  Grant type：Other funds from industry-academia collaboration

  • 金星大気波動の解析

    2022.4 - 2024.3

    Joint research

    　 More details

    Authorship：Coinvestigator(s)  Grant type：Other funds from industry-academia collaboration

  • 回転成層流体における波動現象の多角的理解 International coauthorship

    2022.4 - 2024.3

    九州大学応用力学研究所 

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    Authorship：Principal investigator 

    地球の海洋大気や各種天体の流体運動における波動現象を主な対象として、分野横断的な基礎研究を推進する。

  • Energy cascade and mixing due to internal wave in stratified fluid

    2022.4 - 2023.3

    Joint research

    　 More details

    Authorship：Coinvestigator(s)  Grant type：Other funds from industry-academia collaboration

  • Simons Collaboration on Wave Turbulence International coauthorship

    2022.1

    New York University (USA) 

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    Authorship：Collaborating Investigator(s) (not designated on Grant-in-Aid) 

    サイモンズ財団の助成を受けた波動乱流に関する国際共同研究プロジェクト。

  • Wave Topology in Fluids International coauthorship

    2021.9 - 2023.5

    ENS de Lyon (France) 

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    Authorship：Collaborating Investigator(s) (not designated on Grant-in-Aid) 

    フランス国立研究機構の助成を受けた流体波動のトポロジーに関する研究プロジェクト。

  • 海洋潮汐が励起する回転成層乱流のマルチスケール解析 International coauthorship

    2021.7

    　 More details

    Authorship：Principal investigator 

    流体物理学に関する世界有数の研究機関に長期間滞在し、理論解析・数値シミュレーション・水槽実験を用いて海洋内部領域における波動や乱流を対象とした基礎研究を実施する。

  • 流体波動の局所分離と不安定解析に関する研究

    2021.4 - 2022.3

    Joint research

    　 More details

    Authorship：Principal investigator  Grant type：Other funds from industry-academia collaboration

  • 非平衡開放システムにおける時空間ダイナミクスの研究

    2021.4 - 2022.3

    Joint research

    　 More details

    Authorship：Collaborating Investigator(s) (not designated on Grant-in-Aid)  Grant type：Other funds from industry-academia collaboration

  • 海洋潮汐が励起する回転成層乱流のマルチスケール解析

    2021 - 2023

    Japan Society for the Promotion of Science  Postdoctoral Fellowships for Research Abroad

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    Authorship：Principal investigator  Grant type：Joint research

  • 深海乱流の励起・散逸を同時に再現可能な領域変形スペクトルモデルの開発

    2020.4

    　 More details

    Authorship：Principal investigator 

    科研費若手研究

  • 深海乱流の励起・散逸を同時に再現可能な領域変形スペクトルモデルの開発

    Grant number：20K14556  2020 - 2023

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Early-Career Scientists

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    Authorship：Principal investigator  Grant type：Scientific research funding

  • 海洋システムの統合的理解に向けた新時代の力学理論の構築

    2019.4 - 2020.3

    Joint research

    　 More details

    Authorship：Principal investigator  Grant type：Other funds from industry-academia collaboration

  • 海洋システムの統合的理解に向けた新時代の力学理論の構築

    2019.4 - 2020.3

    北海道大学低温科学研究所(日本) 

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    Authorship：Principal investigator 

  • 流体波動の局所分離解析に関する研究

    2018.4 - 2020.3

    Joint research

    　 More details

    Authorship：Principal investigator  Grant type：Other funds from industry-academia collaboration

  • 東京大学大気海洋研究所気候システム研究系「共同研究」: 海洋深層における乱流拡散のパラメタリゼーション

    2018.4 - 2020.3

    東京大学大気海洋研究所 

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    Authorship：Coinvestigator(s) 

    海洋大循環モデルの精度向上に向け、大型計算機システムを用いた理論計算により、潮汐混合パラメタリゼーションの改善を目指す。

  • 潮汐混合ホットスポットの形成に関わる内部波共鳴現象の解明

    2018.4 - 2020.3

    　 More details

    Authorship：Principal investigator 

    新学術領域研究「海洋混合学の創設」の一環として実施する公募研究である。
    数値モデルと理論解析に基づき。日本南方の深海で生じる潮汐混合過程の理論的解明に取り組んでいる。

  • 波・流れ・乱流のセンシング・マイニング・モデリング: 流体波動の局所分離解析に関する研究

    2018.4 - 2020.3

    九州大学応用力学研究所 

    　 More details

    Authorship：Principal investigator 

    地球流体力学・核融合プラズマの分野横断研究として、数値モデルデータから各種流体波動を分離し、そのエネルギーフラックスを計算する手法を開発。

  • 黒潮大蛇行を引き起こす膠州海山における傾圧不安定の発達過程

    2018.4 - 2019.3

    Joint research

    　 More details

    Authorship：Coinvestigator(s)  Grant type：Other funds from industry-academia collaboration

  • 潮汐混合ホットスポットの形成に関わる内部波共鳴現象の解明

    Grant number：18H04918  2018 - 2020

    Japan Society for the Promotion of Science・Ministry of Education, Culture, Sports, Science and Technology  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research on Innovative Areas

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    Authorship：Principal investigator  Grant type：Scientific research funding

  • 海峡力学過程の統合と解剖

    2016.4 - 2021.3

    　 More details

    Authorship：Coinvestigator(s) 

    科研費 基盤研究(A)

  • 海峡力学過程の統合と解剖

    Grant number：16H02226  2016 - 2020

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

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    Authorship：Coinvestigator(s)  Grant type：Scientific research funding

  • 海洋内部における力学的階層構造の詳細解明に向けた理論的研究

    2015 - 2016

    Japan Society for the Promotion of Science  Research Fellowships for Young Scientists

    　 More details

    Authorship：Principal investigator  Grant type：Joint research

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Educational Activities

  • 平成29年度
    地球流体力学基礎演習第一/第二

    平成30年度
    地球流体力学基礎演習第二
    海洋観測実習

Class subject

  • 海洋観測実習

    2024.4   First semester

  • 地球流体力学基礎演習第二

    2019.10 - 2020.3   Second semester

  • 地球流体力学基礎演習第二

    2018.10 - 2019.3   Second semester

  • 海洋観測実習

    2018.4 - 2018.9   First semester

  • 地球流体力学基礎演習第二

    2017.10 - 2018.3   Second semester

  • 地球流体力学基礎演習第一

    2017.4 - 2017.9   First semester

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Acceptance of Foreign Researchers, etc.

  • インド工科大学マドラス校

    Acceptance period： 2023.9 - 2023.10   （Period）：Less than 2 weeks

    Nationality：India

    Business entity：On-campus funds

Travel Abroad

  • 2022.8

    Staying countory name 1：India   Staying institution name 1：Indian Institute of Technology Madras

  • 2021.7 - 2023.6

    Staying countory name 1：France   Staying institution name 1：École normale supérieure de Lyon

  • 2019.6 - 2019.7

    Staying countory name 1：France   Staying institution name 1：École normale supérieure de Lyon

  • 2019.3

    Staying countory name 1：France   Staying institution name 1：École normale supérieure de Lyon

  • 2019.2

    Staying countory name 1：Germany   Staying institution name 1：Hamburg University

  • 2018.6

    Staying countory name 1：United States   Staying institution name 1：Applied Physics Laboratory, University of Washington

  • 2018.6

    Staying countory name 1：United States   Staying institution name 1：Woods Hole Oceanographic Institution

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