KAMEYAMA, Masanori

Faculty
Geodynamics Research Center
PositionProfessor
Mailkameyama.masanori.my[at]ehime-u.ac.jp In case of sending E-mail, please alternate [at] to @
HomepageURLhttp://earth.sci.ehime-u.ac.jp/~kameyama/index-e.html
Birthday
Last Updated :2018/09/12

Researcher Profile and Settings

Education

  •   1995 04  - 1998 03 , The University of Tokyo, Graduate School of Science
  •   1993 04  - 1995 03 , The University of Tokyo, Graduate School of Science
  •   1989 04  - 1993 03 , The University of Tokyo, Faculty of Science

Academic & Professional Experience

  •   2016 04 ,  - 現在, Ehime University, Geodynamics Research Center, Professor
  •   2007 09 ,  - 2016 03 , Ehime University, Geodynamics Research Center, Associate Professor
  •   2003 04 ,  - 2007 08 , Japan Agency for Marine-Earth Science and Technologu, Earth Simulator Center, Research Scientist

Association Memberships

  • Seismological Society of Japan
  • The Japanese Society for Planetary Sciences
  • American Geophysical Union
  • The Visualization Society of Japan

Research Activities

Research Areas

  • Earth and planetary science, Solid earth and planetary physics

Research Interests

    mantle convection, numerical simulation

Published Papers

Misc

  • Symposium on Computational Planetary Science
    Hayashi Y., Umeda T., Umemura M., Ogawa M., Kameyama M., Planetary People, 23, (1) 64 - 69,   2014 03 25
  • Mantle Convection : "Flows" in the "Solid" Earth's Interior
    KAMEYAMA Masanori, Journal of the Japan Society of Mechanical Engineers, 116, (1136) 478 - 480,   2013 07 05
  • Mantle Convection : Flow of "Solid" Rocks in the Earth's Interior(Fluid Flow Phenomena in Earth Science Part 1: The Interior of the Earth)
    KAMEYAMA Masanori, Journal of Japan Society of Fluid Mechanics, 30, (4) 305 - 310,   2011 08 25
  • Ubiquitous interactive visualization of 3-D mantle convection through web applications using java
    Jonathan C. Mc Lane, Wojciech W. Czech, David A. Yuen, Michael R. Knox, James B S G Greensky, M. Charley Kameyama, Vincent M. Wheeler, Rahul Panday, Hiroki Senshu, Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 5359,   2008 12 01 , We have designed a new system for real-time interactive visualization of results taken directly from large-scale simulations of 3-D mantle convection and other large-scale simulations. This approach allows for intense visualization sessions for a couple of hours as opposed to storing massive amounts of data in a storage system. Our data sets consist of 3-D data for volume rendering with sets ranging as high as over 10 million unknowns at each timestep. Large scale visualization on a display wall holding around 13 million pixels has already been accomplished with extension to hand-held devices, such as the OQO and Nokia N800. We are developing web-based software in Java to extend the use of this system across long distances. The software is aimed at creating an interactive and functional application capable of running on multiple browsers by taking advantage of two AJAX-enabled web frameworks: Echo2 and Google Web Toolkit. © 2008 Springer Berlin Heidelberg.
  • Mantle Convection Visualization
    KAMEYAMA Masanori, Journal of the Visualization Society of Japan, 28, (110) 174 - 179,   2008 07 01
  • The dynamical influences from physical properties in the lower mantle and post-perovskite phase transition
    David A. Yuen, Ctirad Matyska, Ondřej Čadek, Masanori Kameyama, Geophysical Monograph Series, 174,   2007 01 01 , © 2007 by the American Geophysical Union. The discovery of post-perovskite phase transition near the core-mantle boundary (CMB) has turned our heads to the potentially important role played by the increasing complexity of the physical properties in the lower-mantle models. In this study we have investigated the influences on lower mantle dynamics by the strongly depth-dependent coefficient of thermal expansion and radiative thermal conductivity together with the post-perovskite transition within the framework of isochemical models. We have carried out the simulations in both 2-D and 3-D Cartesian geometries. First, we review the basic connection between the temperature profile a nd the Clapeyron slope, calling attention to the special relationship between the temperature intercept of the post-perovskite phase change and the temperature at the core-mantle boundary. Double-crossing of the post-perovskite boundary takes place only, when the temperature of the CMB is greater than the temperature intercept of the phase change. We find that mantle plumes become multiscale in nature because of the combined effects exerted by variable mantle viscosity, strongly depth-dependent thermal expansivity, radiative thermal conductivity at the bottom of the mantle, the spinel to perovskite phase transition and the perovskite to post-perovskite phase change in the deep mantle. Both radiative thermal conductivity and strongly decreasing thermal expansivity in the lower mantle can help to induce partially layered convection with slabs stagnating in the transition zone. In our isochemical models a second low viscosity zone is created under the transition zone accompanied by intense shear heating. Secondary mantle plumes emerge from this region at the base of the transition zone. Large-scale upwellings in the lower mantle are induced mainly by both the style of lower-mantle stratification and the decrease in thermal expansivity. They control the location and the local dynamics of the upper-mantle plumes. In these models with variable thermal conductivity and viscosity, an increase in the temperature of the CMB causes a greater tendency for layered convection. From the same depth-dependent thermal expansivity, we can deduce the 3-D density anomalies from the seismic velocity anomalies inferred from seismic tomographic inversion. Using these density distributions, we can calculate the viscous responses of the Earth due to these density anomalies for a given viscosity structure. We then focus on the lateral viscosity variations of the deep mantle on the solution of the inverse problem involving the inferences of the viscosity from the long-wavelength geoid. Our solution for the large-scale lateral viscosity structure in the lowermost mantle shows that the region underneath hot spots have significantly higher viscosity in the deep mantle than the region below subduction regions. Recent inferences from firstprinciples calculations and laboratory experiments on analogue post-perovskite material also surmise the rheology of post-perovskite would be dominated by dislocation mechanism and be softer than perovskite. We put forth a hypothetical scenario in which the bottom portions of the superplumes in the deep mantle are stiffer than the adjacent post-perovskite mantle and are held fixed by the surrounding horizontal flow of post-perovskite.
  • A 15.2 TFlops simulation of geodynamo on the earth simulator
    Akira Kageyama, Masanori Kameyama, Satoru Fujihara, Masaki Yoshida, Mamoru Hyodo, Yoshinori Tsuda, Proceedings of the ACM/IEEE SC 2004 Conference: Bridging Communities,   2004 01 01 , © 2004 IEEE. For realistic geodynamo simulations, one must solve the magnetohydrodynamic equations to follow time development of thermal convection motion of electrically conducting fluid in a rotating spherical shell. We have developed a new geodynamo simulation code by combining the finite difference method with the recently proposed spherical overset grid called Yin-Yang grid. We achieved performance of 15.2 Tflops (46% of theoretical peak performance) on 4096 processors of the Earth Simulator.

Books etc

  • The earth simulator
    北脇 重宗, 佐久間 弘文, 亀山 真典, 円山 重直, 橋田 俊之, Tohoku University Press,   2007 , ISBN:9784861630804

Conference Activities & Talks

  • Numerical simulations of the coupled magmatism-mantle convection system in 2-D and 3-D geometries
    KAMEYAMA Masanori, OGAWA Masaki,   2017 05 22
  • スーパーアースのマントル対流シミュレーション
    宮腰剛広, 亀山真典, 小河正基, 日本天文学会年会講演予稿集,   2016 02 20
  • マントル対流シミュレーション:地球型惑星内部の解明に向けて
    亀山真典, 宮腰剛広, 柳澤孝寿, 小河正基, 日本天文学会年会講演予稿集,   2016 02 20
  • 数値モデリングによる付加体内部温度構造の推定 南海トラフの例
    亀山真典, 金田義行, 日本地震学会秋季大会講演予稿集,   2001 10 15
  • 構造探査結果および地震活動を用いて推定したフィリピン海プレートの形状
    馬場俊孝, 堀高峰, CUMMIS P R, 亀山真典, 宇平幸一, 金田義行, 日本地震学会秋季大会講演予稿集,   2000 11 09
  • 熱と変形の相互作用からみた摩擦構成則の一解釈
    亀山真典, 堀高峰, CUMMINS P R, 平野聡, 馬場俊孝, 宇平幸一, 金田義行, 日本地震学会秋季大会講演予稿集,   2000 11 09
  • P波速度から推定される堆積物のポアソン比
    東方外志彦, 亀山真典, 平野聡, 宇平幸一, 金田義行, 日本地震学会秋季大会講演予稿集,   2000 11 09
  • 海山の沈み込みに伴う変形と破壊
    馬場俊孝, 堀高峰, PARK J‐O, 平野聡, 亀山真典, CUMMINS P R, 金田義行, 日本地震学会秋季大会講演予稿集,   1999 11 09
  • プレート境界地震後の余効変動 下部地殻での応力緩和とアフタースリップ
    堀高峰, CUMMINS P R, 亀山真典, 平野聡, 馬場俊孝, 金田義行, 日本地震学会秋季大会講演予稿集,   1999 11 09
  • 地殻内の弾性波速度と密度の関係
    東方外志彦, 亀山真典, 金田義行, 河野芳輝, 日本地震学会秋季大会講演予稿集,   1999 11 09
  • Thermal convection with strongly temperature dependent viscosity in the cylindirical polar coordinate.
    中川貴司, 亀山真典, 藤本博巳, 浜野洋三, 理論応用力学講演会講演論文集,   1999 01 25
  • 103 Thermal convection with strongly temperature-dependent viscosity in the cylindrical polar coordinate
    Nakagawa Takashi, Kameyama Masanori C., Hamano Yozo, Abstracts Fall Meeting of the Japanese Society for Planetary Sciences,   1998 10 13 , The viscosity of the mantle is the strongly dependence of the temperature. We simulate the thermal convection with temperature dependent viscosity in the cylindrical polar coordiate. The model is considered basal-heating and time-dependent convection model of the Boussinesq approximation, infinite Prandtl number and Newtonian fluid. The viscosity of modelled mantle is the function of exponential to the temperature. The ratio across inner and outer boundary is used 0.5. The Rayleigh number is used 6×10^6. The viscosity contrast is used up to 10^5. The result of our calculation is similar to 2D box model: we find three styles of convection, which is Whole layer mode, Sluggish lid mode and Stagnant lid mode. Appearance of the Stagnant lid mode, cylindical annulus case is lower viscosity contrast compared with 2D box model. In this presentation, we discuss about temperature dependence of viscosity required the numerical modelling of mantle convection with geometry and dynamics of the lithosphere based on our simulation result.
  • The interaction of viscous heating with grain-size dependent rheology in the formation of localized slip zones.
    亀山真典, 藤本博巳, YUEN D A, 地球惑星科学関連学会合同大会予稿集,   1998 05
  • The Moving-Lid mode in a temperature-dependent viscosity convection in a wide box.
    亀山真典, 小河正基, 藤本博巳, 地球惑星科学関連学会合同大会予稿集,   1998 05
  • Numerical Experiments of Mantle Convection with Grain-Size-Dependent Rheology.
    亀山真典, 藤本博巳, 小河正基, 地球惑星科学関連学会合同大会予稿集,   1997 03
  • Numerical modeling of plate motion with mantle convection.
    亀山真典, 藤本博巳, 日本地震学会秋季大会講演予稿集,   1996 09
  • Numerical experiments of Magma-Migration in a Two-Dimensional Convecting Upper Mantle.
    亀山真典, 藤本博巳, 小河正基, 地球惑星科学関連学会合同大会予稿集,   1996 03
  • Magma-migration in convecting mantle.
    亀山真典, 小河正基, 藤本博巳, 地球惑星科学関連学会合同大会予稿集,   1995 03
  • A numerical model of magma-migration in a convecting upper mantle.
    亀山真典, 小河正基, 藤本博巳, 地球惑星科学関連学会合同大会予稿集,   1995 03
  • 216 Numerical experiments of the effect of density cross over on thermal and chemical evolution of the Earth's upper mantle
    Kameyama Masanori, Ogawa Masaki, Fujimoto Hiromi, Abstracts Fall Meeting of the Japanese Society for Planetary Sciences,   1994 10 03
  • Numerical experiments of the effect of density cross over on thermal and chemical evolution of the Earth's upper mantle.
    亀山真典, 小河正基, 藤本博巳, 日本地震学会秋季大会講演予稿集,   1994 10
  • Numerical experiments of the effect of density cross over on thermal and chemical evolution of the Earth's upper mantle.
    亀山真典, 小河正基, 藤本博巳, 日本惑星科学会秋季講演会予稿集,   1994 10

Research Grants & Projects



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