Welcome to Masaki Yoshida Website

Masaki YOSHIDA, Ph. D. (Research Scientist)

Institute for Research on Earth Evolution (IFREE),
Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
2-15 Natsushima-cho, Yokosuka, Kanagawa 237-0061, Japan.
e-mail: myoshida (at) jamstec (dot) go (dot) jp

Major Geodynamics (mantle-plate dynamics, Earth's rotation dynamics), Seismotectonics, Computational fluid dynamics

Societies

American Geophysical Union^*
Japan Geoscience Union^*
Seismological Society of Japan^*
The Japanese Society for Planetary Sciences^*

Research Subjects
(Ranking by
ongoing work)

Numerical simulation of mantle convection in a 3-D spherical shell model
Interaction between mantle convection and surface tectonics (continents and plate motion)
Instantaneous modeling of mantle flow using geodynamic and seismic tomography models
Dynamics of core-mantle boundary, topography, plume heat flow (project research in IFREE)
Mantle phase transitions and convection behavior
Earth's rotation dynamics and true polar wander (collaborated with Kyushu University)
Mantle dynamics in the French Polynesia region (project research in IFREE)
Mantle convection in terrestrial planets
Slab dynamics, Intraslab stress field, large shallow intraslab earthquake
Others

♠ Recent Figures

Mantle convetion with subducting plates and phase transitions (Yoshida, 2004, EPS)	3-D spherical mantle convection with internal heating	Core-mantle topography estimated from seismic tomography model (Yoshida, 2008, G-cubed)

♠ Education

2003.3 Dr. Sci. (Geophysics), School of Science, University of Tokyo^*

2000.3 M. S. (Geophysics), Graduate School of Science, Hiroshima University^*

1998.3 B. S. (Geophysics), Faculty of Science, Hiroshima University^*

♠ Experience

2006.4-present Research Scientist, Institute for Reserach on Earth Evolution (IFREE) ^*,
Japan Agency for Marine-Earth Science and Technology (JAMSTEC) ^*

2003.4-2006.3 Research Scientist, Earth Simulator Centor ^*,
Japan Marine Science and Technology Center (JAMSTEC) ^* ¹⁾

2000.4-2003.3 Research Fellow (DC1) of The Japan Society for the Promotion of Science ^*,
Earthquake Research Institute, The University of Tokyo ^*

1998.4-2000.3 Teaching Assistant, Faculty of Science ^*, Hiroshima University ^*

1) Japan Agency for Marine-Earth Science and Technology (JAMSTEC) since 2004.4

♠ Publications

A. Reviewed Papers

Masaki Yoshida, Temporal evolution of the stress state in a supercontinent during mantle reorganization, Geophysical Journal International, 180(1), 1-22, doi: 10.1111/j.1365-246X.2009.04399.x, 2010. [abstract] [reprint-PDF]
Masaki Yoshida and Tomoeki Nakakuki, Effects on the long-wavelength geoid anomaly of lateral viscosity variations caused by stiff subducting slabs, weak plate margins and lower mantle rheology, Physics of the Earth and Planetary Interiors, 172(3-4), 278-288, doi:10.1016/j.pepi.2008.10.018, 2009. [abstract] [reprint-PDF]
Masaki Yoshida, Mantle convection with longest-wavelength thermal heterogeneity in a 3-D spherical model: Degree one or two?, Geophysical Research Letters, 35, L23302, doi:10.1029/2008GL036059, 2008. [abstract] [reprint-PDF]
Masaki Yoshida, Core-mantle boundary topography estimated from numerical simulations of instantaneous mantle flow, Geochemistry Geophysics Geosystems (G³), 9(7), Q07002, doi:10.1029/2008GC002008, 2008. [abstract] [reprint-PDF]
Masaki Yoshida and Akira Kageyama, Low-degree mantle convection with strongly temperature- and depth-dependent viscosity in a three-dimensional spherical shell, Journal of Geophysical Research - Solid Earth, 111(B3), B03412, doi:10.1029/2005JB003905, 2006. [abstract] [reprint-PDF]
Masaki Yoshida and Masaki Ogawa, Plume heat flow in a numerical model of mantle convection with moving plates, Earth and Planetary Science Letters, 239(3-4), 276-285, doi:10.1016/j.epsl.2005.09.006, 2005. [abstract] [reprint-PDF]
Akira Kageyama and Masaki Yoshida, Geodynamo and mantle convection simulations on the Earth Simulator using the Yin-Yang grid, Journal of Physics: Conference Series, 16, 325-338, 2005. [abstract] [reprint-PDF]
Akira Kageyama, Masanori Kameyama, Satoru Fujihara, Masaki Yoshida, Mamoru Hyodo, and Yoshinori Tsuda, A 15.2 TFlops Simulation of Geodynamo on the Earth Simulator, 2004 ACM/IEEE Supercomputing Conference (SC2004), 35, doi:10.1109/SC.2004.1, 2004. [abstract] [reprint-PDF]
Masaki Yoshida, Influence of two major phase transitions on mantle convection with moving and subducting plates, Earth, Planets and Space, 56(11), 1019-1033, 2004. [abstract] [reprint-PDF]
Masaki Yoshida, Possible effects of lateral viscosity variations induced by plate-tectonic mechanism on geoid inferred from numerical models of mantle convection, Physics of the Earth and Planetary Interiors, 147(1), 67-85, doi:10.1016/j-pepi.2004.06.011, 2004. [abstract] [reprint-PDF]
Masaki Yoshida and Akira Kageyama, Application of the Yin-Yang grid to a thermal convection of a Boussinesq fluid with infinite Prandtl number in a three-dimensional spherical shell, Geophysical Research Letters, 31(12), L12609, doi:10.1029/2004GL019970, 2004. [abstract] [reprint-PDF]
Masaki Yoshida and Masaki Ogawa, The role of hot uprising plumes in the initiation of plate-like regime of three-dimensional mantle convection, Geophysical Research Letters, 31(5), L05607, doi:10.1029/2003GL017376, 2004. [abstract] [reprint-PDF]
Tetsuzo Seno and Masaki Yoshida, Where and why do large shallow intraslab earthquakes occur?, Physics of the Earth and Planetary Interiors, 141(3), 183-206, doi:10.1016/j-pepi.2003.11.002, 2004. [abstract] [reprint-PDF]
Masaki Yoshida, Satoru Honda, Motoyuki Kido, and Yasuyuki Iwase, Numerical simulation for the prediction of the plate motions: Effects of lateral viscosity variations in the lithosphere, Earth, Planets and Space, 53(7), 709-721, 2001. [abstract] [reprint-PDF]
Satoru Honda, Masaki Yoshida, Sakie Ootorii, and Yasuyuki Iwase, The timescales of plume generation caused by continental aggregation, Earth and Planetary Science Letters, 176(1), 31-43, 2000. [abstract] [reprint-PDF]
Masaki Yoshida, Yasuyuki Iwase, and Satoru Honda, Generation of plumes under a localized high viscosity lid on 3-D spherical shell convection, Geophysical Research Letters, 26(7), 947-950, 1999. [abstract] [reprint-PDF]

B. Non-reviewed Papers

Satoru Honda, Masaki Yoshida, Yasuyuki Iwase, and Tomoeki Nakakuki, Generation of plumes by continental insulation, Monthly Chikyu, 23(7), 507-510, 2001. (in Japanese)

C. Thesis

Masaki Yoshida, Numerical studies on the dynamics of the Earth's mantle convection with moving plates, Ph. D. Thesis, University of Tokyo, pp. 203, 2003.
Masaki Yoshida, Numerical modeling of mantle convection and surface tectonics, Master's Thesis, Hiroshima University, pp. 165, 2000.
Masaki Yoshida, Effects of stiff continental lithosphere on three-dimensional spherical convection and analyses of toroidal-poloidal velocity fields, Bachleor's Thesis, Hiroshima Univeristy, pp. 52, 1998.

Major		Geodynamics (mantle-plate dynamics, Earth's rotation dynamics), Seismotectonics, Computational fluid dynamics
Societies		American Geophysical Union^* Japan Geoscience Union^* Seismological Society of Japan^* The Japanese Society for Planetary Sciences^*
Research Subjects (Ranking by ongoing work)		Numerical simulation of mantle convection in a 3-D spherical shell model Interaction between mantle convection and surface tectonics (continents and plate motion) Instantaneous modeling of mantle flow using geodynamic and seismic tomography models Dynamics of core-mantle boundary, topography, plume heat flow (project research in IFREE) Mantle phase transitions and convection behavior Earth's rotation dynamics and true polar wander (collaborated with Kyushu University) Mantle dynamics in the French Polynesia region (project research in IFREE) Mantle convection in terrestrial planets Slab dynamics, Intraslab stress field, large shallow intraslab earthquake Others

2003.3		Dr. Sci. (Geophysics), School of Science, University of Tokyo^*
2000.3		M. S. (Geophysics), Graduate School of Science, Hiroshima University^*
1998.3		B. S. (Geophysics), Faculty of Science, Hiroshima University^*

2006.4-present		Research Scientist, Institute for Reserach on Earth Evolution (IFREE) ^, Japan Agency for Marine-Earth Science and Technology (JAMSTEC) ^
2003.4-2006.3		Research Scientist, Earth Simulator Centor ^, Japan Marine Science and Technology Center (JAMSTEC) ^ ¹⁾
2000.4-2003.3		Research Fellow (DC1) of The Japan Society for the Promotion of Science ^, Earthquake Research Institute, The University of Tokyo ^
1998.4-2000.3		Teaching Assistant, Faculty of Science ^, Hiroshima University ^