Published Articles (Published in 2025)

Importance of pumiceous sediment in influencing chemistry of hydrothermal fluids in Okinawa Trough: insights from boron isotopic ratios

Tomohiro Toki, Naoya Ebina, Yuki Mitsutome, Ke-Han Song, Ryuichi Shinjo, Jun-ichiro Ishibashi, Shinsuke Kawagucci

Enhancing nitrogen status evaluation using qualitative indicators: a case study in Matsushima Bay, Japan

Mengqi Jiang, Tetsuroh Ishikawa, Keisuke Takatsudo, Ken’ichi Osaka, Nay Lin Maung, Hirotsugu Arai, Akiko Makabe, Naoko Tokuchi, Kentaro Hayashi, Keisuke Koba

Estimation of methane emissions from inundated areas in northern Eurasia using a process-based model and remotely sensed inundation dynamics data

Akihiko Ito, Hirokli Mizuochi, Tetsuya Hiyama

Latitudinal gradient of brown carbon aerosols from the western north Pacific to the Arctic

Chunmao Zhu, Fumikazu Taketani, Takuma Miyakawa, Masayuki Takigawa, Yugo Kanaya

Working standards and analytical framework for CSIA: isotopic composition (δ¹³C, δ¹⁵N, and δ³⁴S) of 21 amino acids and 7 nucleobases

Nanako O OGAWA, Yoshinori Takano, Yu Itahashi, Naoto F Ishikawa, Naohiko Ohkouchi

Nitrogen and carbon flows in a microbial mat involving anaerobic oxidation of methane in northwestern Black Sea: Perspectives from nitrogen and carbon isotopic composition of coenzyme F430 and its biosynthetic pathway

Masanori Kaneko; Yoshinori Takano; Yuta Isaji; Nanako O Ogawa; Yoshito Chikaraishi; Naoto F. Ishikawa; Hiroyuki Imachi; Yoshihiro Takaki; Miyuki Ogawara; Fumie Kabashima; Martin Krüger; Naohiko Ohkouchi

An Improved Narrower-Diameter EA/IRMS Method with a Built-in Desulfurization Reactor: Optimization for Nitrogen and Carbon Measurement without Sulfur Matrix Interference

Yohei Matsui, Wataru Fujisaki, Takahiro Aze, Toshihiro Miyajima, Shinsuke Kawagucci, Eiji Tasumi, Masahiro Yamamoto, Yoshinori Takano, Tomohiro Toki

Application of structured geological maps to prediction of landslide occurrence based on statistical mechanics

Kazuhiro Miyazaki, Hiroki Mizuochi

Purification of hydroxyproline for small-scale radiocarbon dating verified using archaeological bone collagen

Yu Itahashi, Yoshinori Takano, Yoshito Chikaraishi, Nanako O. Ogawa, Naoto F. Ishikawa, Naohiko Ohkouchi, Masako Yamane, Yusuke Yokoyama, Minoru Yoneda

Seasonal and interannual variations in local minimum sea surface temperature and maximum chlorophyll-a around the Savu Sea, Indonesia

Florence Mila Purnomo Sie, Sayaka Yasunaka, Anindya Wirasatriya