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Koki Maruyama

Central Research Institute of Electric Power Industry

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Publication

Featured researches published by Koki Maruyama.

Journal of Radioanalytical and Nuclear Chemistry | 2004

Calculation of artificial radionuclides in the ocean by an ocean general circulation model

Daisuke Tsumune; Michio Aoyama; Katsumi Hirose; Koki Maruyama; Norikazu Nakashiki

The concentrations of three artificial radionuclides (90Sr, 137Cs and 239+240Pu) introduced into seawaters from global fallout were simulated from 1957 to 1994 by using an ocean general circulation model. The distributions of the calculated 137Cs and 90Sr concentrations were in good agreement with the observed concentrations. The vertical distribution of the calculated 239+240Pu concentration in the South Pacific also agreed with the observed data. However, the calculated 239+240Pu concentrations in the North Pacific water columns were significantly underestimated in comparison with the observed data, which strongly suggests the presence of additional sources of plutonium input to the North Pacific.

Hydrological Processes | 2011

Estimation of potential changes in cereals production under climate change scenarios

Kenichi Tatsumi; Yosuke Yamashiki; Roberto Valmir Da Silva; Kaoru Takara; Yuzuru Matsuoka; Kiyoshi Takahashi; Koki Maruyama; Naoko Kawahara

Archive | 2005

Multi-century ensemble global warming projections using the Community Climate System Model (CCSM3)

Yoshikatsu Yoshida; Koki Maruyama; Junichi Tsutsui; Norikazu Nakashiki; Frank O. Bryan; Maurice L. Blackmon; B. A. Boville; Richard D. Smith

Climate Dynamics | 2006

Long-term climate response to stabilized and overshoot anthropogenic forcings beyond the twenty-first century

Junichi Tsutsui; Yoshikatsu Yoshida; Dong-Hoon Kim; Hideyuki Kitabata; Keiichi Nishizawa; Norikazu Nakashiki; Koki Maruyama

Geophysical Research Letters | 2005

Regional cooling in the South Pacific sector of the Southern Ocean due to global warming

Dong-Hoon Kim; Norikazu Nakashiki; Yoshikatsu Yoshida; Koki Maruyama; Frank O. Bryan

Ocean Modelling | 2006

Recovery of thermohaline circulation under CO2 stabilization and overshoot scenarios

Norikazu Nakashiki; Dong-Hoon Kim; Frank O. Bryan; Yoshikatsu Yoshida; Daisuke Tsumune; Koki Maruyama; Hideyuki Kitabata

Sola | 2006

Permafrost Thawing in Circum-Arctic and Highlands under Climatic Change Scenario Projected by Community Climate System Model (CCSM3)

Hideyuki Kitabata; Keiichi Nishizawa; Yoshikatsu Yoshida; Koki Maruyama

Proceedings of the Symposium on Global Environment | 2001

Calculation of fallout concentration in the Japan Sea

Daisuke Tsumune; Michio Aoyama; Katsumi Hirose; Jong Hwan Yoon; Cheol-Ho Kim; Koki Maruyama; Norikazu Nakashiki; Fukiko Taguchi

Geophysical Research Letters | 2005

Regional cooling in the South Pacific sector of the Southern Ocean due to global warming: REGIONAL COOLING DUE TO GLOBAL WARMING

Dong-Hoon Kim; Norikazu Nakashiki; Yoshikatsu Yoshida; Koki Maruyama; Frank O. Bryan

Asia-pacific Journal of Atmospheric Sciences | 2005

Ocean Climate Change in the Western North Pacific (WNP) under the Multi-Century Three-Member Ensemble Predictions

Dong-Hoon Kim; Norikazu Nakashiki; Daisuke Tsumune; Yoshikatsu Yoshida; Koki Maruyama; Frank O. Bryan

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Norikazu Nakashiki

Central Research Institute of Electric Power Industry

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Yoshikatsu Yoshida

Central Research Institute of Electric Power Industry

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Daisuke Tsumune

Central Research Institute of Electric Power Industry

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Frank O. Bryan

National Center for Atmospheric Research

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Dong-Hoon Kim

Korea Meteorological Administration

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Hideyuki Kitabata

Central Research Institute of Electric Power Industry

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Junichi Tsutsui

Central Research Institute of Electric Power Industry

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Katsumi Hirose

Hirosaki University

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Keiichi Nishizawa

Central Research Institute of Electric Power Industry

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Dong-Hoon Kim

Korea Meteorological Administration

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