JAMSTEC > Research Institute for Value-Added-Information Generation (VAiG) > Center for Mathematical Science and Advanced Technology (MAT) > Member > Yasuko Yamagishi

Center for Mathematical Science and Advanced Technology (MAT)

Members

Yasuko Yamagishi

photo

Technical Support Staff
Japan Agency for Marine-Earth Science and Technology
Center for Mathematical Science and Advanced Technology

3173-25, Showa-machi, Kanazawa-ku, Yokohama-city, Kanagawa, 236-0001, Japan
yamagisi_at_jamstec.go.jp


Short CV

Research Key Words: Convection, Plume, Google Earth, Web Application

Employment

2013.4 - present Technical Support Staff, Japan Agency for Marine-Earth Science & Technology
2001.6 - 2013.3 Technical Scientist, Japan Agency for Marine-Earth Science & Technology (formerly Japan Marine Science & Technology Center)
1998.4 - 2001.3 Postdoctral Fellowship, Japan Society for the Promotion of Science

Education

1995.4 - 1998.3 Doctoral Course in Earth & Planet. Phys., Univ. of Tokyo
1993.4 - 1995.3 Master's Course in Science & Engineering, Univ. of Tsukuba

Research Topics

Three-dimensional Visualization of Seismic Tomographic model
Subducted slabs form convective downwelling of the Earth’s lithosphere, therefore describing the style of them is important to understand mantle dynamics in the Earth. Seismic tomographic models have been developed to provide clear images of subducted slabs. Most of the previous methods for three-dimensional visualization of tomography display the iso-surface of seismic velocity perturbation, which, however, does not give in general natural image of the subducted slab because the slab cannot be delineated by a fixed value of the seismic velocity perturbation. We propose a new method for visualizing three-dimensionally seismic tomographic model to express the geometry of the subducted slabs. This method can show variation of the seismic velocity perturbations, so it provides a slab image consistent with that obtained from two-dimensional cross-sections. The visualization proposed here will be useful to describe the geometry of subducted slabs and to clarify the evolutional processes of them.
seismic_tomography
Subducted slabs from Japn Trench and Izu-Bonin Trench. (Blue: Upper Mantle, Right Blue: Transition Zone, Green: Lower Mantle)

Publications

Original Papers (Peer-Reviewed)

  • Yanagisawa, T., Y. Hamano, T. Miyagoshi, Y. Yamagishi, Y. Tasaka, Y. Takeda, Convection patterns in a liquid metal under an imposed horizontal magnetic field, Physical Review E, 88, 063020, 2013.
  • Yamagishi, Y., K. Suzuki, H. Tamura, H. Yanaka, S. Tsuboi, Visualization of geochemical data for rocks and sediments in Google Earth: Development of a data converter application for geochemical and isotopic datasets in database systems, Geochem. Geophys. Geosyst., 12, Q03016, doi:10.1029/2010GC003490, 2011.
  • Yanagisawa, T., Y. Yamagishi, Y. Hamano, Y. Tasaka, Y. Takeda, Spontaneous flow reversals in Rayleigh-Benard convection of a liquid metal, Physical Review E, 83, 036307, 2011.
  • Yanagisawa, T., Y. Yamagishi, Y. Hamano, Y. Tasaka, K. Yano, J. Takahashi, Y. Takeda, Detailed investigation of thermal convection in a liquid metal under a horizontal magnetic field: suppression of oscillatory flow observed by velocity profiles, Physical Review E, 82, 056306, 2010.
  • Yanagisawa, T., Y. Yamagishi, Y. Hamano, Y. Tasaka, M. Yoshida, K. Yano, Y. Takeda, Structure of large-scale flows and their oscillation in the thermal convection of liquid gallium, Physical Review E, 82, 016320, 2010.
  • Yanagisawa, T., Y. Yamagishi, Y. Hamano, D. R. Stegman, Mechanism for generating stagnant slabs in 3-D spherical mantle convection models at Earth-like conditions, Phys. Earth Planet. Inter., 183, 341-352, doi:10.1016/j.pepi.2010.02.005, 2010.
  • Yamagishi, Y., H. Yanaka, K. Suzuki, S. Tsuboi, T. Isse, M. Obayashi, H. Tamura, H. Nagao, Visualization of geoscience data on Google Earth: development of a data converter system for seismic tomographic models, Computers & Geosciences, 36, 373-382, doi:10.1016/j.cageo.2009.08.007, 2010.
  • Yamagishi, Y., H. Nagao, K. Suzuki, H. Tamura, H. Yanaka, T. Hiyama, S. Tsuboi, Development of Conversion Tool for observation data of JAMSTEC research vessels to KML, JAMSTEC Report R&D, Special Issue, 173-178, 2009.
  • Yamagishi, Y., H. Nagao, K. Suzuki, H. Tamura, T. Hatakeyama, H. Yanaka, S. Tsuboi, Google Earth as Geoscience Data Browser Project: Development of a tool to convert JAMSTEC research vessel navigation data to KML, Data Science Journal, 8, S85-S91, 2009.
  • Kimura, J., Y. Yamagishi, K. Kurita, Tectonic history of Europa: Coupling between internal evolution and surface stresses, Earth Planets Space, 59, 2, 113-125, 2007.
  • Ichikawa, H., K. Kurita, Y. Yamagishi, T. Yanagisawa, Cell pattern of thermal convection induced by internal heating, Phys. Fluids, 18, doi:10.1063/1.2181047, 2006.
  • Tasaka, Y., T. Yanagisawa, Y. Yamagishi, M. Yoshida, Y. Takeda, Measurement of Liquid Metal Flow using Ultrasonic Velocity Profiler (2nd Report, Visualization of Thermal Convective Motion in Liquid Gallium Layer), 72, 718, 175-181, 2006.
  • Yanagisawa, T., Y. Yamagishi, Rayleigh-Benard Convection in Spherical Shell with Infinite Prandtl Number at High Rayleigh Number, Journal of Earth Simulator, 4, 11-17, 2005.
  • Ogawa, Y., Y. Yamagishi, K. Kurita, Evaluation of melting process of the permafrost on Mars: its implication for surface features, J. Geophys. Res., 108(E4), 8046, doi:10.1029/2002JE001886, 2003.
  • Hamano, Y., T. Yanagisawa, Y. Yamagishi, Geodynamo and Mantle Dynamics, Journal of Geography, vol.114 No.2, 142-150, 2005.
  • Yamagishi, Y., K. Kurita, Diversity and Evolution of Icy Satellites, Planetary People, vol. 8, no. 1, pp. 23-33、1999.

Books and Book Chapters

  • Yamagishi, Y., J. Kimura, K. Kurita, Section 4.6 Icy Satellites in Utility of Earth Observation Data 1　(Series for Practical Use of Remote Sensing Data for Environment and Resource, vol. 4) edited by Y. Yamaguchi, pp. 172-187, Earth Remote Sensing Data Analysis Center, Tokyo, March 2004.