Ohta Tohru

オオタトオル | Ohta Tohru

Affiliation and department：
Job title： Professor
Homepage URL (1)： http://www.dept.edu.waseda.ac.jp/ohta-lab/OhtaLab-website/index.html

Research field (1)： Solid earth science

Research keywords (1)： Basin analysis, Sedimentary gravity flow, Sandstone composition, Logratio analysis

Research theme for competitive and other funds (9)：

2021 - 2024 白亜紀海洋無酸素事変の原因としての“風化仮説”の検証
2019 - 2022 Verification of abrupt climate change in hothouse climate state from lacustrine varve record
2018 - 2021 東アジア大陸における白亜紀古気候の時空変化:温暖期の大気循環システムの解明
2015 - 2018 Sand grain shape analysis by Elliptic Fourier-Principal Component Analysis: proposal of an index to determine paleo-wave energy
2013 - 2016 Core-drilling survey of Cretaceous lacustrine deposits in Mongolia: land-ocean linkage during OAE period on tens of thousands year scale

Show all

Papers (44)：

Naofumi Yamaguchi, Tsuyoshi Ando, Hirotaka Enokida, Natsumi Nakada, Syota Yamaki, Tohru Ohta. Logratio analysis of components separated from grain-size distributions and implications for sedimentary processes: An example of bottom surface sediments in a shallow lake. Sedimentology. 2024
Hitoshi Hasegawa, Nagayoshi Katsuta, Yasushi Muraki, Ulrich Heimhofer, Niiden Ichinnorov, Hirofumi Asahi, Hisao Ando, Koshi Yamamoto, Masafumi Murayama, Tohru Ohta, et al. Decadal-centennial-scale solar-linked climate variations and millennial-scale internal oscillations during the Early Cretaceous. Scientific Reports. 2022. 12. 1
Tenichi Cho, Tohru Ohta. A robust chemical weathering index for sediments containing authigenic and biogenic materials. Palaeogeography, Palaeoclimatology, Palaeoecology. 2022. 608. 111288-111288
Rajat Mazumder, Trisrota Chaudhuri, Shuvabrata De, Wilfried Bauer, Muzna Al Hadi, Kenichiro Sugitani, Mark A. van Zuilen, Ryoko Senda, Mariko Yamamoto, P.V. Sunder Raju, et al. Paleoarchean surface processes and volcanism: Insights from the eastern Iron Ore Group, Singhbhum craton, India. Earth-Science Reviews. 2022. 232. 104122-104122
Tenichi Cho, Masayuki Ikeda, Tohru Ohta. Increased Terrigenous Supply to the Pelagic Panthalassa Superocean Across the Carnian Pluvial Episode: A Possible Link With Extensive Aridification in the Pangean Interior. Frontiers in Earth Science. 2022. 10

ｍore...

MISC (3)：

Kusano Hiroki, Hasebe Nobuyuki, Nagaoka Hiroshi, Shibamura Eido, Amano Yoshiharu, Ohta Tohru, Fagan Timothy J., Kuno Haruyoshi. Active X-ray spectrometer for lunar landing mission. JSAP Annual Meetings Extended Abstracts. 2016. 2016.1. 523-523
Kusano Hiroki, Hasebe Nobuyuki, Nagaoka Hiroshi, Shibamura Eido, Amano Yoshiharu, Ohta Tohru, Fagan Timothy J., Kuno Haruyoshi. Gamma-ray and neutron spectrometer for Martian satellites exploration. JSAP Annual Meetings Extended Abstracts. 2016. 2016.1. 526-526
OHTA T., FAGAN T., AMANO Y., HASEBE N. Estimation of space weathering effects by the major element compositions of the Apollo samples. 2011. 2011. 21

Books (3)：

Compositional data analysis
2023 ISBN:9784254122886
地球・環境・資源 : 地球と人類の共生をめざして
共立出版 2019 ISBN:9784320047341
日本の地質構造百選
朝倉書店 2012 ISBN:9784254162738

Lectures and oral presentations (139)：

堆積物の地球化学データへの多変量統計解析と人工知能の応用
(日本堆積学会20周年記念行事 2023)
Application of multivariate statistics and artificial intelligence to sediment geochemistry
(Geoscience Paradigm 2023)
北海道蝦夷層群における白亜紀海洋無酸素事変の原因としての“風化仮説”の検証
(日本地質学会第122年学術大会 2015)
四万十帯砕屑物組成の時間・空間変化様式:琉球と三重地域の広域比較
(日本地質学会第122年学術大会 2015)
楕円フーリエ-主成分分析法を用いた砕屑物粒子形状の定量化および堆積場判別手法の検証
(日本地質学会第122年学術大会 2015)

ｍore...

Education (2)：

- 2004 Waseda University Graduate school of Science and Engineering Environment, Resources and Materials Science Engineering
- 2000 Kyushu University Faculty of Science Earth and Planetary Sciences

Professional career (1)：

Doctor (Science) (Waseda University)

Work history (6)：

2017/03 - 現在 Waseda University Faculty of Education and Integrated Arts and Sciences Professor
2012/03 - 2016/03 Waseda University Faculty of Education and Integrated Arts and Sciences Associate Professor
2013 - 2013 : Part-time lecturer of Graduate School of Chiba university
2008 - 2011 : Assistant professor at School of Education, Waseda University
2005 - 2007 : Research associate at School of Education, Waseda University

Show all

Association Membership(s) (8)：

Geological Society of Japan , Sedimenlotogical Society of Japan , Japan Society of Geoinformatics , Geochemical Society of Japan , Japan Association of Mineralogical Sciences , International Association of Sedimentologists , Japan Geoscience Union , American Geophysical Union

※ Researcher’s information displayed in J-GLOBAL is based on the information registered in researchmap. For details, see here.

Return to Previous Page