Climate System Research Group

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Grad stundent is now wanted. If you are interested in my group, please contact me(seki at


Research:The Earth's climate system consists of several subsystems. When external foring is applied to the climate system, subsystems interact with each other and then climate changes. In order to correctly predict climate change in the future, a deeper understanding of how this climate system works is required. However, the response time of each subsystem to climate forcing varies from daily to more than thousand year time scales, and its full scope has not been revealed yet. In order to understand the whole climate system, it is necessary to analyze time series data of paleoclimate change including long time scale change. Our laboratory reconstructs climate variations in various time scale from various paleoclimate archives (marine & lake/peat sediments and ice core etc.) and analyzes the paleoclimate data to better underdtand the mechanism of climate changes.

Studied area
・Maine Sediment:
Sea of Okhotsk, Bering Sea, Equatorial Pacific, Caribbean Sea, Southern Ocean, North Atlantic, North Pacific
・Lacustrine sediments & wetalnd peat: Lakes and wetlands in Hokkaido Island, Lake Biwa, Hongyuan wetland (Tibet),Hani wetland(NE China), Wetlands in Borneo Island
・Ice core:Greenalnd ice sheet,Antarctic ice sheet, Kamchatka glacier, Alaskan glacier


Earth system,Climate system, Teleconnection, Radiavive forcing, Climate sensitivity, Earth system sensitivity, Aerosol, Arctic Oscillation, Atlantic Multidecadal Oscillation, Pacific Decadal Oscillation, El Nino Southern Oscillation, Monsoon, Medieval Climate Anomaly, Little Ice Age, Glacial-Interglacial cycle, Milankovich theory, Superinterglacial, Dansgaard Oeschgar Cycle, Northern Hemispehre Glaciation, Late Miocene cooling, Mid Miocene Climate Optimum, Biomarker, Microfossil, isotope, marine sediment, lacustrine sediment, peat,ice core