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Hiroshi Tanimoto, Toshinobu Machida, Tomoko Shirai, Yosuke Niwa, Tsuneo Matsunaga, Tazu Saeki, Hisashi Yashiro, Nobuko Saigusa, Yu Someya, Taku Umezawa, et al. Future collaboration between the USA and Japan for possible development of a Japan GHG Center. Bulletin of the American Meteorological Society. 2024
Hideki Nara, Takuya Saito, Taku Umezawa, Yasunori Tohjima. A high-accuracy dynamic dilution method for generating reference gas mixtures of carbonyl sulfide at sub-nanomole-per-mole levels for long-term atmospheric observation. Atmospheric Measurement Techniques. 2024
Yosuke Niwa, Yasunori Tohjima, Yukio Terao, Tazu Saeki, Akihiko Ito, Taku Umezawa, Kyohei Yamada, Motoki Sasakawa, Toshinobu Machida, Shin-Ichiro Nakaoka, et al. Supplementary material to "Multi-observational estimation of regional and sectoral emission contributions to the persistent high growth rate of atmospheric CH4 for 2020-2022". 2024
Yosuke Niwa, Yasunori Tohjima, Yukio Terao, Tazu Saeki, Akihiko Ito, Taku Umezawa, Kyohei Yamada, Motoki Sasakawa, Toshinobu Machida, Shin-Ichiro Nakaoka, et al. Multi-observational estimation of regional and sectoral emission contributions to the persistent high growth rate of atmospheric CH4 for 2020-2022. 2024
RECONSTRUCTION OF PAST VARIATIONS OF THE CARBON AND HYDROGEN ISOTOPIC RATIOS IN ATMOSPHERIC METHANE FROM ITS VERTICAL DISTRIBUTION OBSERVED IN NGRIP FIRN
(Abstr Int Symp Arct Res 2013)