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1,294 labs · 618 student voices
Makoto Uyeshima, Professor
Earth & Climate0 student voices
The Uyeshima Lab studies the distribution of subsurface electrical resistivity, a measure of how poorly the ground conducts electricity, to understand the mechanisms of earthquakes and volcanic eruptions. Electrical resistivity is sensitive to factors such as rock temperature and the amount and connectivity of water and magma in the gaps between rock grains, so it provides information distinct from that given by seismic waves. In collaboration with researchers in Japan and abroad, the lab reveals subsurface electrical resistivity structure, from earthquake source regions and volcanic areas to the whole Japanese archipelago. The lab also works on developing electromagnetic observation techniques and methods for estimating subsurface structure from observational data.
Naoki Uchida, Professor
Earth & Climate0 student voices
The Uchida Lab uses a variety of observational data, including seismometer records, to study how earthquakes occur in the subduction zones where Japan is located. Its core interest is the preparation process and mechanisms of earthquakes, which could potentially lead to earthquake prediction and forecasting. Rather than refining one fixed method, the lab advances its research by examining the data and learning whatever knowledge and techniques are needed along the way. The lab is also interested in making effective use of earthquake and volcano data to accelerate data-driven science.
Eitarou Oka, Professor
Earth & Climate0 student voices
The Oka Lab (Ocean General Circulation Research Group) studies the "ocean general circulation," the large-scale ocean currents that circulate around the world's oceans. The ocean general circulation transports heat, salt, nutrients, and more, and has a major influence on the Earth's climate and on marine ecosystems. Centered on observations from research vessels, the lab investigates the actual state of ocean currents and the mechanisms that drive them. The lab puts particular emphasis on research in the North Pacific, where the Kuroshio and Oyashio flow.
Oka Akira, Associate Professor
Earth & Climate0 student voices
The Oka Lab studies climate change over long timescales, both what has happened in the past and what could happen in the future. The ocean plays a major role in climate variability longer than several decades. In particular, circulation that includes the deep ocean affects the climate of the entire Earth over timescales of more than a thousand years. The lab reproduces this deep ocean circulation with climate models and ocean models, aiming to clarify the mechanisms behind its stability and variability. The lab also investigates the relationship between deep ocean circulation and the distribution of substances such as carbon in the deep ocean.
Chie Yokoyama, Lecturer
Earth & Climate0 student voices
Yokoyama Lab studies the mechanisms of clouds and precipitation by analyzing satellite observation data. The radar on the Global Precipitation Measurement (GPM) satellite captures even how rain is distributed in the vertical direction. Using that data, the lab has shown that heavy rain events that look alike can actually fall in several distinct patterns. The lab also links these findings to climate model projections to investigate how rainfall patterns will change as global warming progresses.
Yu Kosaka, Associate Professor
Earth & Climate0 student voices
The Kosaka Lab (Global Climate Dynamics) studies the mechanisms by which the Earth's climate as a whole fluctuates and shifts. Using global observational data and climate models, the lab works on a wide range of topics, from the mechanisms behind extreme weather to future projections of global warming. The lab looks at both human-caused warming and natural variability, the two sources of climate fluctuations. The lab is located in the Research Center for Advanced Science and Technology and has many connections with researchers overseas.
Shirai Kotaro, Associate Professor
Earth & Climate0 student voices
The Shirai Lab reconstructs past environments by analyzing the calcium carbonate produced by organisms such as corals, bivalves, and foraminifera. Some chemical compositions and isotope ratios in shells and skeletons change in sensitive response to changes in the surrounding environment, such as water temperature and salinity. To predict future environments, the lab investigates in detail what past environments were like. Fieldwork for sample collection is part of the research, but the core of the work is steady chemical analysis and microscope observation in the laboratory.
Jin-Oh Park, Associate Professor
Earth & Climate0 student voices
The Park Lab studies how giant earthquakes and tsunamis occur in ocean trenches, based on the structure and properties of the subseafloor. Using seismic reflection data and deep-sea drilling data, the lab maps the subsurface structure in fine detail and estimates the movement of subsurface water (fluids). The main study area is the Nankai Trough in southwestern Japan, where giant earthquakes and tsunamis have occurred repeatedly. Students who wish to join the lab enter the Department of Earth and Planetary Science, Graduate School of Science.
Asuka Yamaguchi, Associate Professor
Earth & Climate0 student voices
The Yamaguchi Lab studies deformation and material movement at subduction zones, where oceanic plates sink beneath other plates. Subduction zones are the largest shear zones on Earth, and they are also places where water and materials are transported on a massive scale. Deformation and material cycling there have a major influence on earthquakes and volcanic eruptions in the short term, and on the rise and decline of continents and on climate change in the long term. By combining deep-sea drilling, marine surveys, and onshore geological fieldwork, the lab seeks to approach these questions from both mechanical and chemical perspectives.
Masakazu Yoshimori, Associate Professor
Earth & Climate0 student voices
The Yoshimori Lab studies the mechanisms of global warming, polar climate, and past climate variability. The lab places importance on understanding climate as a whole by clarifying how the atmosphere, ocean, sea ice, and land surface influence one another. Its main tool is the climate model, a virtual Earth built inside a computer. In addition to numerical experiments, the lab uses observational data and reconstructed data of past climates to verify the reliability of its models.
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