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Shimizu Lab
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A lab that uses Earth's magnetic field to uncover the motions of the mantle and core.
AboutAbout the lab
Following the magnetic field deep into the Earth.
The Shimizu Lab studies the magnetic fields of the Earth and other planets, and the dynamics of their deep interiors.
Using geomagnetic and electromagnetic data from the Earth, the lab estimates the electrical conductivity structure of the deep mantle and the motion of fluid near the surface of the core.
Using the theory of how the magnetic field is generated within the core, the lab also investigates how conditions in the lowermost mantle affect the motion of the core.
Key terms
- Electrical conductivity
- A measure of how easily a material conducts electricity. It varies with temperature, water content, and the presence of partially molten regions, and serves as a clue to conditions underground.
- Core
- The central part of the Earth. It consists of a liquid outer core and a solid inner core, and the flow of iron in the outer core generates the Earth's magnetic field.
- Inner core
- The solid iron sphere at the center of the Earth. It grows gradually as the surrounding liquid outer core cools and solidifies.
ResearchResearch themes
The lab estimates the electrical conductivity structure of the deep mantle and the motion of fluid near the surface of the core from geomagnetic and electromagnetic data of the Earth. Using these results, it aims to clarify the dynamics of the coupled mantle-core system.
*Illustrative imageElectrical conductivity structure of the deep mantle
Using geomagnetic and electromagnetic data from the Earth, the lab estimates how easily electricity flows through the deep mantle (its electrical conductivity structure).
*Illustrative imageCore flow and mantle-core dynamics
The lab estimates the motion of fluid near the surface of the core from electromagnetic data and, together with the electrical conductivity structure, aims to clarify the dynamics of the system made up of the mantle and the core.
*Illustrative imageMagnetic field generation and inner core growth
Using the theory of how the magnetic field is generated inside the core, the lab investigates how conditions in the lowermost mantle affect core dynamics. It also works on modeling how the inner core grows.
MembersFaculty
- ProfessorHisayoshi ShimizuPublications ↗
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Mercury in color - Prockter07-edit1” National Aeronautics and Space Administration/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington / Public domain (cropped)
- Electrical conductivity structure of the deep mantle: “Earth Interior Structure Blank” Volcan26 / CC BY-SA 4.0 (cropped)
- Core flow and mantle-core dynamics: “Dynamo Theory - Outer core convection and magnetic field generation-ja” Bcxfu75k / CC BY-SA 4.0 (cropped)
- Magnetic field generation and inner core growth: “Geomagnetic field and magnet analogy” Quatus / CC BY-SA 4.0 (cropped)
- Related lab (Baba Lab (Ocean Hemisphere Research Center)): “Ocean Bathymetry (NESDIS Bathymetry)” NOAA / Public domain (cropped)
- Related lab (Koyama Lab): “Mount Mihara ( )” Guilhem Vellut / CC BY 2.0 (cropped)
- Related lab (Takei Lab): “Olivine in polarizing light” Islam90 / CC BY-SA 4.0 (cropped)
- Related lab (Araya Lab): “Interferenz-michelson” FL0 / CC BY-SA 3.0 (cropped)
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