2026 Taikan Oki: Earth Science Researcher – H-Index, Publications & Awards

Discipline name	D-Index	World Ranking	Current World Ranking	National Ranking	Current National Ranking	Publications	Citations
Earth Science	78	571	503	8	8	467	39429

Research.com Recognitions

2026 - Research.com Earth Science in Japan Leader Award
2025 - Research.com Earth Science in Japan Leader Award
2014 - Fellow of American Geophysical Union (AGU)

Overview

Taikan Oki is affiliated with the University of Tokyo in Japan and specializes in environmental science. Their work primarily focuses on water science and technology, atmospheric science, global and planetary change, ocean engineering, and ecology.

Their research covers a range of topics including:

Hydrology and watershed management studies
Water resources management and optimization
Water-Energy-Food Nexus studies
Flood risk assessment and management
Cryospheric studies and observations
Climate variability and models
Geology and paleoclimatology research

Taikan Oki has contributed significantly to academic literature with recent papers such as:

"The timing of unprecedented hydrological drought under climate change," 2022, Nature Communications
"Illuminating water cycle modifications and Earth system resilience in the Anthropocene," 2020, Water Resources Research
"The Water Planetary Boundary: Interrogation and Revision," 2020, One Earth
"Water pricing reform for sustainable water resources management in China's agricultural sector," 2022, Agricultural Water Management
"Water Governance Contribution to Water and Sanitation Access Equality in Developing Countries," 2020, Water Resources Research

The scientist has collaborated frequently with others in their field, with notable co-authors including Naota Hanasaki, Kei Yoshimura, Masashi Kiguchi, Kanon Kino, and Daisuke Tokuda.

Their work is published across multiple venues with repeated contributions to:

Environmental Research Letters
Zenodo (CERN European Organization for Nuclear Research)
Hydrological Research Letters
JOURNAL OF JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
SSRN Electronic Journal

Taikan Oki was awarded the title of Fellow of the American Geophysical Union (AGU) in 2014.

Best Publications

Global Hydrological Cycles and World Water Resources

Taikan Oki;Taikan Oki;Shinjiro Kanae

4800
Citations
Climate change 2007 : impacts, adaptation and vulnerability : Working Group II contribution to the Fourth Assessment Report of the IPCC Intergovernmental Panel on Climate Change

Tarekegn Abeku;Pamela Abuodha;Francis Adesina;Neil Adger

3266
Citations
Regions of Strong Coupling Between Soil Moisture and Precipitation

Randal D. Koster;Paul A. Dirmeyer;Zhichang Guo;Gordon Bonan

3192
Citations
IAHS Decade on Predictions in Ungauged Basins (PUB), 2003–2012: Shaping an exciting future for the hydrological sciences

M. Sivapalan;K. Takeuchi;S. W. Franks;V. K. Gupta

1594
Citations
Water scarcity assessments in the past, present, and future

Junguo Liu;Hong Yang;Hong Yang;Simon N. Gosling;Matti Kummu

1083
Citations
The implications of projected climate change for freshwater resources and their management

Z.W. Kundzewicz;L.J. Mata;Nigel William Arnell;P. Doll

1040
Citations
A physically based description of floodplain inundation dynamics in a global river routing model

Dai Yamazaki;Shinjiro Kanae;Hyungjun Kim;Taikan Oki

976
Citations
GSWP-2 Multimodel Analysis and Implications for Our Perception of the Land Surface

Paul A. Dirmeyer;Xiang Gao;Mei Zhao;Zhichang Guo

914
Citations
Global potential soil erosion with reference to land use and climate changes

Dawen Yang;Shinjiro Kanae;Taikan Oki;Toshio Koike

895
Citations
GLACE: The Global Land-Atmosphere Coupling Experiment. Part I: Overview

Randal D. Koster;Zhichang Guo;Paul A. Dirmeyer;Gordon Bonan

851
Citations
The WULCA consensus characterization model for water scarcity footprints: assessing impacts of water consumption based on available water remaining (AWARE)

Anne Marie Boulay;Anne Marie Boulay;Jane Bare;Lorenzo Benini;Markus Berger

829
Citations
Design of Total Runoff Integrating Pathways (TRIP)—A Global River Channel Network

Taikan Oki;Y. C. Sud

728
Citations
An integrated model for the assessment of global water resources – Part 1: Model description and input meteorological forcing

N. Hanasaki;S. Kanae;T. Oki;K. Masuda

683
Citations
Multimodel Estimate of the Global Terrestrial Water Balance: Setup and First Results

Ingjerd Haddeland;Douglas B. Clark;Wietse Franssen;Fulco Ludwig

644
Citations
A reservoir operation scheme for global river routing models

Naota Hanasaki;Shinjiro Kanae;Taikan Oki

580
Citations
Historical isotope simulation using Reanalysis atmospheric data

K. Yoshimura;K. Yoshimura;M. Kanamitsu;D. Noone;T. Oki

573
Citations
Global projections of changing risks of floods and droughts in a changing climate

Yukiko Hirabayashi;Shinjiro Kanae;Seita Emori;Taikan Oki

549
Citations
Impact of Climate Change on River Discharge Projected by Multimodel Ensemble

Daisuke Nohara;Akio Kitoh;Masahiro Hosaka;Taikan Oki

538
Citations
Water scarcity hotspots travel downstream due to human interventions in the 20th and 21st century

T.I.E. Veldkamp;T.I.E. Veldkamp;Y. Wada;J.C.J.H. Aerts;J.C.J.H. Aerts;P. Döll

496
Citations
An integrated model for the assessment of global water resources - Part 2: Applications and assessments

N. Hanasaki;S. Kanae;T. Oki;K. Masuda

466
Citations
Does higher surface temperature intensify extreme precipitation

Nobuyuki Utsumi;Shinta Seto;Shinjiro Kanae;Eduardo Eiji Maeda

461
Citations
Global hydrological cycles and world water resources

Taikan Oki

311
Citations

Frequent Co-Authors

Shinjiro Kanae Tokyo Institute of Technology

Kei Yoshimura University of Tokyo

Naota Hanasaki National Institute for Environmental Studies

Hyungjun Kim University of Tokyo

Dai Yamazaki University of Tokyo

Yadu Pokhrel Michigan State University

Yukiko Hirabayashi Shibaura Institute of Technology

Qiuhong Tang Chinese Academy of Sciences

Petra Döll Goethe University Frankfurt

Yoshihide Wada King Abdullah University of Science and Technology

External Links

Personal website of Taikan Oki

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