Research field (2)：
Atmospheric and hydrospheric science
, Solid earth science
Research keywords (4)：
Astrobiology
, Comparative Plantology
, Earth and Planetary System Science
, Comparative planetology
Research theme for competitive and other funds (16)：
2018 - 2023 Estimation of location, magnitude, and mode of the impact of a small solar system body in Southeast Asia at ca. 0.8 Ma and its effect on the surrounding environment
2016 - 2019 A study on the Proterozoic marine environment with a new model of marine biogeochemical cycle including microbial metabolism
2010 - 2012 Study of physical conditions for climate mode of terrestrial water-rich planets in the extrasolar planetary systems
2008 - 2010 Did change of deep water source amplify or diminish the climate fluctuation?: oceanic event stratigraphy of sulfur isotopes
2006 - 2008 Reconstruction and system analyses of the global events of the Earth during the Paleoproterozoic
2005 - 2007 A study for the long-term and short-term disturbances of the envirnment by the extraterrestrial impact at the Cretaceous/Tertiary boundary
2002 - 2004 Study of snowball Earth events and rise of the atmospheric oxygen based on geologicalg survey of glacial sediments of the Paleoproterozoic
2002 - 2003 Snowball Earth Condition inAGCMs : Effect of Season and Continental Distribution.
2000 - 2002 Study of the geomagnetic variation and its relation to climate change
2000 - 2001 Theoretical study on behavior of the Earth system in the snowball Earth phenomena
1999 - 2001 A study on the environmental catastrophe at the K/T bundary
1997 - 1998 氷期・間氷期サイクルにおける炭素循環及び気候変動についての理論的研究
1993 - 1995 Reconstruction of the aridity in Central Asia during Quaternary and its relation to the variation in atmospheric circulation
1993 - 1994 Evaporation kinetics of minerals and isotopic fractination ; application to the solar nebula
地球環境の安定性と進化に関する研究
Study on Lon-term Stability and Evolution of the Terrestrial Environment
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Papers (100)：
Yasuto Watanabe, Kazumi Ozaki, Eiichi Tajika. Marine phosphate level during the Archean constrained by the global redox budget. Geophysical Research Letters. 2024. 51. 7. e2023GL108077
Yasuto Watanabe, Eiichi Tajika, Kazumi Ozaki. Evolution of iron and oxygen biogeochemical cycles during the Precambrian. Geobiology. 2023
Yasuto Watanabe, Eiichi Tajika, Kazumi Ozaki. Biogeochemical transformations after the emergence of oxygenic photosynthesis and conditions for the first rise of atmospheric oxygen. Geobiology. 2023
Kosuke T. Goto, Maria Luisa G. Tejada, Eiichi Tajika, Katsuhiko Suzuki. Enhanced magmatism played a dominant role in triggering the Miocene Climatic Optimum. Communications Earth & Environment. 2023. 4. 1
Kazumi Ozaki, Devon B. Cole, Christopher T. Reinhard, Eiichi Tajika. CANOPS-GRB v1.0: a new Earth system model for simulating the evolution of ocean-atmosphere chemistry over geologic timescales. Geoscientific Model Development. 2022. 15. 20. 7593-7639
Y. Chang, M. Kayama, E. Tajika, Y. Sekine, T. Sekine, H. Nishido, T. Kobayashi. SHOCK-INDUCED EFFECT ON CHATHODO-LUMINESENCE OF EXPERIMENTALLY SHOCKED QUARTZ. METEORITICS & PLANETARY SCIENCE. 2015. 50
The evolution and diversity of the surface environment on Earth-like planets with ocean and carbonate-silicate geochemical cycle. Proceedings of the ISAS Lunar and Planetary Symposium. 2014. 46. 5p
Kadoya S., Watanabe Y., Sekine Y., Tajika E. Evolution of surface environments of the Earth and terrestrial planets(2). Planetary People. 2013. 22. 4. 234-241
TAJIKA E. Preface. Planetary People. 2013. 22. 1. 3-3
2013/03 - 2015/03 Cabinet Office Committee on National Space Policy
2013/01 - 2014/12 Japanese Society of Planetary Science President
2008/08 - 2010/07 Ministry of Education, Culture, Sports, Science and Technology Senior Scientific Research Specialist
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Awards (2)：
2007 - The Meteorological Society of Japan Horiuchi Award Theoretical research on the evolution and variations of Earth's environment
2003 - Yamazaki Scholarship Society The 29th Yamazaki Prize Study on the stability and variability of Earth's environment
Association Membership(s) (9)：
日本地球惑星科学連合
, 米国地質学会(Geological Society of America)
, 米国地球物理学連合(American Geophysical Union)
, 日本気象学会
, 日本地震学会
, 日本惑星科学会
, The Japanese Society for Planetary Sciences
, Geological Society of America
, American Geophysical Union
