Naveen Chandra, Prabir K. Patra, Ryo Fujita, Lena Höglund-Isaksson, Taku Umezawa, Daisuke Goto, Shinji Morimoto, Bruce H. Vaughn, Thomas Röckmann. Methane emissions decreased in fossil fuel exploitation and sustainably increased in microbial source sectors during 1990-2020. Communications Earth & Environment. 2024
Hideki Nara, Takuya Saito, Taku Umezawa, Yasunori Tohjima. Supplementary material to "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". 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. 2024
Akihiko Ito, Prabir K. Patra, Taku Umezawa. Bottom-Up Evaluation of the Methane Budget in Asia and Its Subregions. Global Biogeochemical Cycles. 2023
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)