吉岡 洋 YOSIOKA Hiroshi

ID:1000010027287

愛知県立大学 Aichi Prefectural University (2010年 CiNii収録論文より)

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Articles:  1-20 of 32

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  • Descriptions of Sea-Surface Roughness and Drag Coefficient Based on Windsea Parameters

    SUGIHARA Yuji , ANDO Takuya , SAEKI Takuro , SERIZAWA Shigeatsu , YOSHIOKA Hiroshi

    We examined field observation data of the friction velocity on the sea surface to describe the roughness and the drag coefficient in terms of windsea parameters. Estimations of the friction velocity …

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 66(1), 96-100, 2010

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  • Evaluation of Drag Coefficient over the Ocean Surface Based on Wave-Field Conditions

    ANDO Takuya , SAKURAGI Koji , SUGIHARA Yuji , SERIZAWA Shigeatsu , YOSHIOKA Hiroshi

    Estimations of the drag coefficient over the ocean surface were made by means of the eddy correlation and inertial dissipation methods. The variation of the drag coefficient with the wave age and swel …

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 65(1), 81-85, 2009

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  • Wave Dependence of Drag Coefficient over the Ocean Surface  [in Japanese]

    ANDO Takuya , SUGIHARA Yuji , SERIZAWA Shigeatsu , YOSHIOKA Hiroshi

    The eddy correlation method (ECM) and the inertial dissipation method (IDM) are used to obtain the drag coefficient and the sea surface roughness over the ocean surface. The influence of the wave fiel …

    日本流体力学会年会講演論文集 2009, 299, 2009

    NDL Digital Collections 

  • Evaluation of Air-Sea CO_2 Flux by the Combined Use of Eddy Correlation and Inertial Dissipation Methods  [in Japanese]

    SAEKI Takuro , SUGIHARA Yuji , ANDO Takuya , SERIZAWA Shigeatsu , YOSHIOKA Hiroshi

    Turbulent fluxes of momentum, sensible heat, latent heat and CO_2 were obtained from field measurements at a sea observation tower. These were estimated by the combined use of two methods, i.e., the e …

    日本流体力学会年会講演論文集 2009, 298, 2009

    NDL Digital Collections 

  • Evaluating the variability of sea-surface wind stress by the combined use of eddy correlation and inertial dissipation methods  [in Japanese]

    桜木 幸司 , 杉原 裕司 , 安東 卓哉 [他] , 芹澤 重厚 , 吉岡 洋

    Field measurements of wind stress over the ocean surface were made at a sea observation tower by the combined use of the eddy correlation and inertial dissipation methods, which are referred to as "EC …

    Engineering sciences reports, Kyushu University 29(4), 392-398, 2008-03

    IR  DOI 

  • Evaluating the wind stress over the ocean surface by the combined use of eddy correlation and inertial dissipation methods  [in Japanese]

    Ando Takuya , Sugihara Yuji , Sakuragi Koji , Serizawa Shigeatsu , Yoshioka Hiroshi

    Field measurements of wind stress over the ocean surface were made at a sea observation tower by the combined use of the eddy correlation and inertial dissipation methods, which are referred to as ECM …

    NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan 57(0), 111-111, 2008

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  • Evaluating momentum and CO<SUB>2</SUB> fluxes over the ocean surface by the combined use of eddy correlation and inertial dissipation methods

    SAKURAGI Koji , SUGIHARA Yuji , SERIZAWA Shigeatsu , YOSHIOKA Hiroshi

    Field measurements of momentum and CO<SUB>2</SUB> fluxes over the ocean surface were made at a sea observation tower by means of the eddy correlation and inertial dissipation methods. Unde …

    PROCEEDINGS OF HYDRAULIC ENGINEERING 52, 295-300, 2008

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  • Evaluating the Variability of Wind Stress over the Ocean Surface by the Combined Use of Eddy Correlation and Inertial Dissipation Methods

    SUGIHARA Yuji , ANDO Takuya , SAKURAGI Koji , SERIZAWA Shigeatsu , YOSHIOKA Hiroshi

    Field measurements of wind stress over the ocean surface were made by the combined use of theeddy correlation andinertial dissipation methods, which are referred to as “ECM” and “IDM …

    PROCEEDINGS OF COASTAL ENGINEERING, JSCE 55, 46-50, 2008

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  • Dependence of the hybrid model for CO_2 transfer velocity on wave-field conditions  [in Japanese]

    MAEHARA Shinji , SUGIHARA Yuji , SERIZAWA Shigeatsu , YOSHIOKA Hiroshi

    In the hybrid model of Woolf (2005), CO_2 transfer velocity is expressed as the sum of contributions by wave breaking and non wave-breaking. This model is expected to describe the dependence of the tr …

    日本流体力学会年会講演論文集 2008, 181, 2008

    NDL Digital Collections 

  • Imaging measurement of whitecaps over the ocean surface  [in Japanese]

    MIZUNO Yusuke , SUGIHARA Yuji , TSUMORI Hiromichi , SERIZAWA Shigeatsu , YOSHIOKA Hiroshi

    Wave breaking plays an important role in air-sea exchanges of momentum, heat and mass because of the enhancement of turbulence and air entrainment. Images of whitecaps were taken by digital video came …

    日本流体力学会年会講演論文集 2008, 175, 2008

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  • Field Experiment on the Variability of Sea-Surface Wind Stress with Wave-Field Conditions  [in Japanese]

    ANDO Takuya , SUGIHARA Yuji , SAKURAGI Koji , SERIZAWA Shigeatsu , YOSHIOKA Hiroshi

    Field experiments of sea-surface wind stress were made at a sea observation tower by the combined use of the eddy correlation and inertial dissipation methods, which are referred to as "ECM" and "IDM" …

    日本流体力学会年会講演論文集 2008, 173, 2008

    NDL Digital Collections 

  • Influence of the Presence of Swell on Air-Sea CO2 Transfer Velocity

    SHIGA Satoru , SAKURAGI Koji , SUGIHARA Yuji , TSUMORI Hiromichi , SERIZAWA Shigeatsu , YOSHIOKA Hiroshi

    Field measurements at a sea observation tower were made to investigate the dependence of air-sea CO<SUB>2</SUB> transfer velocity on swell conditions. Based on directional wave spectra, we …

    PROCEEDINGS OF COASTAL ENGINEERING, JSCE 54, 46-50, 2007

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  • Measurements of flux of carbon dioxide across the air-sea interface  [in Japanese]

    SAKURAGI Koji , SUGIHARA Yuji , SHIGA Satoru , SERIZAWA Shigeatsu , YOSHIOKA Hiroshi

    Turbulent fluxes of momentum, sensible heat, latent heat and CO_2 were measured at a sea observation tower by means of the eddy correlation method. Environmental factors controlling the air-sea flux o …

    日本流体力学会年会講演論文集 2007, 51, 2007

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  • 大気-海洋間におけるCO2交換速度の波浪条件依存性  [in Japanese]

    津守 博通 , 志賀 慧 , 畠山 文香 , 杉原 裕司 , 芹澤 重厚 , 吉岡 洋

    海洋観測塔において風速, 波浪, CO<SUB>2</SUB>濃度, 水蒸気濃度等の現地観測を行い, WPL補正に基づく渦相関法からCO<SUB>2</SUB>フラックスを算定した.得られたCO<SUB>2</SUB>フラックスと大気-海洋間のCO<SUB>2</SUB>分圧差からCO<SUB&g …

    PROCEEDINGS OF COASTAL ENGINEERING, JSCE 53, 51-55, 2006

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  • AM06-10-010 Dependence of air-sea CO_2 transfer velocity on breaking-wave parameters  [in Japanese]

    SHIGA Satoru , SUGIHARA Yuji , TSUMORI Hiromichi , HATAKEYAMA Fumika , SERIZAWA Shigeatsu , YOSHIOKA Hiroshi

    The influence of wave-field conditions on the air-sea transfer velocity of CO_2 is investigated on the basis of field measurements. The present data show that the transfer velocity is relatively suppr …

    日本流体力学会年会講演論文集 2006, 110, 2006

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  • 風の息が励起する副振動  [in Japanese]

    吉岡 洋 , 大森 咲枝 , 芹澤 重厚 , 高山 知司

    和歌山県田辺湾に隣接する下芳養湾で荒天時に顕著にみられる局地的な副振動は風向の変化に敏感に対応していた. その成因を風の息に求めて, 高潮モデルに空間全域一様な風の息を与えて沿岸水位を計算すると, 特定の風向で周期6分の副振動を下芳養湾だけに発達させることができたが, 実際に発生した波高には及ばなかった. 風の息に場所による位相差を与えて風域の移動をモデルに取りいれると, その移動速度が湾外水域の …

    PROCEEDINGS OF COASTAL ENGINEERING, JSCE 52, 186-190, 2005

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  • 風波とうねりが混在する波浪場の海面抵抗則に関する研究  [in Japanese]

    杉原 裕司 , 津守 博通 , 大賀 崇史 , 吉岡 洋 , 芹澤 重厚

    海洋観測塔において得られた海上風乱流と波浪の現地観測データに基づいて, 風波とうねりが混在する波浪場における海面抵抗係数と海面粗度の特性を検討した.特に, 方向スペクトルから風波とうねりの伝播方向を同定し, 海面抵抗則がそれらの偏角にどのように影響を受けるのかに着目した.うねりが存在する場合の有義波高と有義波周期の関係は3/2乗則よりも下方に大きく外れることがわかった.海面抵抗係数に対するうねりの …

    PROCEEDINGS OF COASTAL ENGINEERING, JSCE 51, 66-70, 2004

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  • 気象・波浪条件が白波被覆率に及ぼす影響  [in Japanese]

    津守 博通 , 杉原 裕司 , 古寺 大悟 , 吉岡 洋 , 芹澤 重厚

    海洋観測塔においてサンプリング間隔1秒で海面デジタル画像を取得し, 600枚の画像の平均値として精度の高い白波被覆率の算定を行った.海面撮影と同時に気象および波浪観測も行い, 気象・波浪条件に対する白波被覆率の依存性について検討した.白波被覆率の値はオーダー的に他の研究者のものと一致し, 高風速領域では海上風速ひ10の約3乗に比例して増加する.同じひ10に対しては, 大気の不安定性が強い場合, 波 …

    PROCEEDINGS OF COASTAL ENGINEERING, JSCE 51, 51-55, 2004

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  • EFFECT OF WAVE DIRECTION FOR EXCITATION OF SEICHE MOTION  [in Japanese]

    YOSHIOKA Hiroshi , KOKURA Takashi , TAKAYAMA Tomotsuka , SERIZAWA Shigeatsu

    The long period oscillation (LPO) with high amplitude (1m) and period less than 5-minute was observed at Shimohaya Bay in Wakayama Prefecture in a storm. The sea wind gustiness and wave group observed …

    PROCEEDINGS OF CIVIL ENGINEERING IN THE OCEAN 20, 797-802, 2004

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  • The Effect of Coastal Wind on Water Exchange and Red Tide in Tanabe Bay  [in Japanese]

    YOSHIOKA Hiroshi

    海と空 77(2), 83-90, 2001-09-07

    References (11)

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