Search Results 1-20 of 68

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  • Planetary-scale streak structure reproduced in high-resolution simulations of the Venus atmosphere with a low-stability layer

    Kashimura Hiroki , Sugimoto Norihiko , Takagi Masahiro , Matsuda Yoshihisa , Ohfuchi Wataru , Enomoto Takeshi , Nakajima Kensuke , Ishiwatari Masaki , Sato Takao M. , Hashimoto George L. , Satoh Takehiko , Takahashi Yoshiyuki O. , Hayashi Yoshi-Yuki

    … Here we succeed, for the first time, in reproducing the patterns of the observed streak structure, as regions of strong downward flows that develop in high-resolution global simulations of the Venus atmosphere. … The streaks of downward flow result from the interaction of the meridionally tilted phase lines of the Rossby-like waves and the characteristics of baroclinic instability produced around the low-stability layer. …

    Nature Communications (10), 23, 2019-01-09

    IR 

  • DEVELOPING A TIDAL FLOW PREDICTION SYSTEM WITH INTERNAL TIDES FOR THE AREA VICINITY OF THE IZU-OSHIMA ISLAND  [in Japanese]

    MASUNAGA Eiji , YAMAZAKI Hidekatsu , YAMAGUCHI Kunihisa

    …  This study investigated impacts of internal tdies on oceanic flows and developed a tide prediction system with considering internal tides. … The baroclinic kinetic energy excited by internal tides explains 59% of the total kinetic energy in the study domain. … This implies that internal tides play an important role in oceanic flows. … Internal tides cause complicated flow structures and they significantly influence sea surface flows. …

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 74(2), I_643-I_648, 2018

    J-STAGE 

  • A STUDY OF FLOW FIELD INFLUENCED BY INTERNAL TIDES AND THE KUROSHIO AROUND THE IZU-CHAIN ISLANDS  [in Japanese]

    SUZUE Yota , UCHIYAMA Yusuke , YAMAZAKI Hidekatsu , YAMAZAKI Hidekatsu

    … Although the total and baroclinic components of kinetic eneygy increase due to the tides, the barotropic kinetic energy component decreased by the tidal forcing. … The internal waves accompanied by strong baroclinic flows largely contribute to the flow compared to the currents due to winds and the Kuroshio. …

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 73(2), I_451-I_456, 2017

    J-STAGE 

  • Eddy-induced transport of the Kuroshio warm water around the Ryukyu Islands in the East China Sea

    Yuki Kamidaira , Yusuke Uchiyama , Satoshi Mitarai

    … The Kuroshio flows on the shelf break of the East China Sea approximately 150–200 km from the islands; … An energy conversion analysis relevant to the eddy-generation mechanisms revealed that a combination of both the shear instability due to the Kuroshio and the topography and baroclinic instability around the Kuroshio front jointly provoke these near-surface anticyclonic eddies, as well as the subsurface cyclonic eddies that are shed around the shelf break. …

    Continental Shelf Research (143), 206-218, 2016-07-15

    IR 

  • Examination on Effects of River Flooding Pattern on Baroclinic Structure in the Ariake Sea  [in Japanese]

    YANO Shinichiro , NISHIMURA Keisuke , KITAGAWA Yohei , Abdul N. Arifin

    … We conducted numerical simulation of baroclinic currents due to two large floods in 2006 and 2012 from rivers located in the Ariake Sea, Japan in order to evaluate effects of climate change by global warming on regions of freshwater influence (ROFIs), in other word, baroclinic structure in the bay. …

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 70(2), I_436-I_440, 2014

    J-STAGE 

  • Examination on the Relationship between Bottom Sediment Transport and Baroclinic Structure by Numerical Model in Minamata Bay  [in Japanese]

    YANO Shinichiro , KAWASE Hayato , HISANO Akihiro , RIOGILANG Herawaty , MATSUYAMA Akito , TADA Akihide

    … As a result, it was clarified that long term bottom sediment transport was determined by both of barotropic currents and baroclinic ones. … Thus, accurate numerical model for particulate mercury fate must take into account baroclinic structure in actual coastal area due to freshwater inflow. …

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 70(2), I_416-I_420, 2014

    J-STAGE 

  • Vertical Circulations Generated in Frontal Regions  [in Japanese]

    Yoshikawa Yutaka , Onitsuka Goh

    … These experiments show that baroclinic unstable wave grows and three-dimensional geostrophic and ageostrophic flows are formed in the frontal region. …

    Bulletin on Coastal Oceanography 50(2), 95-101, 2013

    J-STAGE 

  • Vertical modes of quasi-geostrophic flows in an ocean with bottom topography : evolution equation and energetics

    Masuda Akira , 増田 章

    … Quasi-geostrophic current is expanded in terms of vertical modes such as barotropic and baroclinic ones. … A comprehensive formulation is given of the expansion of the quasi-geostrophic flows in terms of vertical modes both for a level model and for a layer model. … Under the rigid lid surface condition, the barotropic mode does not make a triplet with two different baroclinic modes, in the three-mode nonlinear advective interaction. …

    Reports of Research Institute for Applied Mechanics,Kyushu University -(141), 27-46, 2011-09

    IR  DOI 

  • The Effect of Koshu Seamount on the Formation of the Kuroshio Large Meander South of Japan

    Endoh Takahiro , Tsujino Hiroyuki , Hibiya Toshiyuki , 遠藤 貴洋

    Journal of Physical Oceanography 41(9), 1624-1629, 2011-09

    IR 

  • Physical Oceanography of Soya Warm Current : Mechanisms of the Cold Belt Formation off the Soya Warm Current  [in Japanese]

    Mitsudera Humio , Uchimoto Keisuke , Nakamura Tomohiro

    … The Soya Warm Current(SWC)flows through a shallow strait between the Japan Sea and the Sea of Okhotsk. … Mechanisms of the cold belt formation are discussed from a point of view of resonant interaction between a barotropic stratified flow and a shallow sill, and subsequent baroclinic adjustment along SWC. …

    Bulletin on Coastal Oceanography 49(1), 3-12, 2011

    J-STAGE  NDL Digital Collections 

  • CHARACTERISTICS OF THE INTERNAL TIDE AND ITS ASSOCIATED COOLING SYSTEM IN GENKA BAY, OKINAWA, JAPAN

    ROUF Muhammad Abdur , NAKAZA Eizo , KUDAKA Ryutarou , KOTLER Liliane

    … The study results show that the depth-averaged current flows nearly parallel to the coastline. … Spectra of the baroclinic and bottom water temperature also congruent the internal tide based cooling system in GB. …

    Doboku Gakkai Ronbunshuu B 66(2), 157-166, 2010

    J-STAGE 

  • Turbulent Combustion Modeling in Supersonic Flows for Future RBCC Vehicles

    INGENITO Antonella , BRUNO Claudio

    … Mixing and combustion of supersonic reacting flows are currently under investigation for new generation RBCC vehicles. … In the present paper, a new SGS model for supersonic reacting flows is being proposed. … This equation accounts for the effect of heat release due to combustion, dilatation due to the compressibility of the fluid, and the pressure gradient that are responsible for the baroclinic term and then for streamwise vorticity and dissipation. …

    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, SPACE TECHNOLOGY JAPAN 7(ists26), Pa_71-Pa_76, 2009

    J-STAGE 

  • Cohesive sediment transport in the 3D-hydrodynamic-baroclinic circulation model in the Mahakam Estuary, East Kalimantan, Indonesia

    Mandang Idris , Hoitnk A. J. F. , Yanagi Tetsuo

    … A fully three-dimensional finite difference baroclinic model system for hydrodynamics and cohesive sediment transport is described. … During the ebb tidal condition, the combined gravitational and tidal flows moved the low salinity water seaward from the upstream, leading to a rapid decrease of salinity near the mouth of the estuary. …

    Coastal marine science 33(1), 9-21, 2009

    IR  DOI 

  • Seasonal Variations of Water System Distributions and Flow Patterns off the West Coast of Hokkaido  [in Japanese]

    HIGAKI Naoyuki , ISODA Yutaka , ISOGAI Yasuhiro , YAHABA Hiroshi , Naoyuki Higaki , Yutaka Isoda , Yasuhiro Isogai , Hiroshi Yahaba , 北海道立地質研究所 , 北海道大学大学院水産科学研究院 , 北海道大学大学院水産科学研究院 , 北海道大学大学院水産科学研究院 , Geological Survey of Hokkaido , Graduate School of Fisheries Sciences Hokkaido University , Graduate School of Fisheries Sciences Hokkaido University , Graduate School of Fisheries Sciences Hokkaido University

    … During the summer season when the sea surface temperature increases, the Tsushima Warm Current (TWO) flows northward carrying more saline water in the intermediate layer (about 50 m depth). … The current flows swiftly along the west coast of the Tsugaru Strait and diverts offshore at Ishikari Bay. …

    Oceanography in Japan 17(4), 223-240, 2008-07-05

    References (28) Cited by (2)

  • The Other Density Current System in Osaka Bay and Kii Channel

    KIM H. G. , NAKATSUJI Keiji , MAEDA Emi , NISHIDA Shuzo

    … The upper residual current flows southward, while the lower does northward. … In the present study, the three dimensional baroclinic flow model with Lagrangian particles tracking method was used. …

    PROCEEDINGS OF COASTAL ENGINEERING, JSCE (55), 391-395, 2008

    J-STAGE 

  • Structure and Intensity Change of Typhoon Songda (0418) Undergoing Extratropical Transition

    Kitabatake Naoko , Hoshino Shunsuke , Bessho Kotaro , Fujibe Fumiaki

    … Diagnoses of upper-tropospheric flows and the quasi-geostrophic omega equation suggest baroclinic development of Songda due to its interaction with a disturbance that originates in the upper troposphere in the midlatitude westerly. … Finally it is pointed out that the interaction between the tropical cyclone and the baroclinic disturbance may cause ambiguity of the cyclone center. …

    Papers in Meteorology and Geophysics (58), 135-153, 2007

    J-STAGE 

  • Local Energetics Analysis of Blocking Formation in the North Pacific Decomposed in Vertical Mean and Sheared Flows

    WATARAI Yasushi , TANAKA H. L.

    … Kinetic energy budget is then performed in the framework of the vertical mean and sheared flows, and the energetics terms, including the barotropic-baroclinic interactions, C (K_s,K_m), are analyzed. … On the contrary, a ridge flows away downstream when B (K_m + φ_m) is negative there. …

    Journal of the Meteorological Society of Japan 82(5), 1447-1458, 2004-10-25

    NDL Digital Collections  References (20) Cited by (1)

  • Local Energetics Analysis of Blocking Formation in the North Pacific Decomposed in Vertical Mean and Sheared Flows

    WATARAI Yasushi , TANAKA H.L

    … Kinetic energy budget is then performed in the framework of the vertical mean and sheared flows, and the energetics terms, including the barotropic-baroclinic interactions, C(K<sub>s</sub>,K<sub>m</sub>), are analyzed. … On the contrary, a ridge flows away downstream when B(K<sub>m</sub> …

    Journal of the Meteorological Society of Japan. Ser. II 82(5), 1447-1458, 2004

    J-STAGE 

  • An Experimental Study of Wave Dispersion in a Differentially Heated Rotating Fluid Annulus with a Radially Sloping Bottom

    TAMAKI Katsumi , UKAJI Kazuo

    Baroclinic waves in a rotating fluid annulus with a downward sloping bottom in the radial direction and with a free upper surface have been studied experimentally. … Dispersive wave flows due to the effect of the depth variation (the topographic β-effect) have been observed and analyzed with special attention to the interactions among the wave components. …

    Journal of the Meteorological Society of Japan 81(5), 951-962, 2003-10-27

    NDL Digital Collections  References (15)

  • Jet Sets

    WILLIAMS G. P.

    … To broaden the range of known circulations and to test existing theory, a variety of issues are examined concerning the dynamics of flows in thick, thin, and transitional atmospheric layers. … When the background static stability is absent, the standard circulation theory becomes less valid as the cells and baroclinic instability become more intense and act together to stabilize low and middle latitudes. …

    Journal of the Meteorological Society of Japan. Ser. II 81(3), 439-476, 2003-06-25

    J-STAGE  NDL Digital Collections  References (40)

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