Environmental Chemodynamics Section

We conduct research on the development and application of measurement techniques to understand the dynamics of chemical substances in the environment and the biogeochemical cycle on various spatiotemporal scales.




Bottom-up Evaluation of the Methane Budget in Asia and its Subregions
Ito, A., Patra, P. K., & Umezawa, T.
Global Biogeochemical Cycles, 37, e2023GB007723 (2023)
Near-real-time estimation of fossil fuel CO2 emissions from China based on atmospheric observations on Hateruma and Yonaguni Islands, Japan
Tohjima, Y., Niwa, Y., Patra, P. K., Mukai, H., Machida, T., Sasakawa, M., Tsuboi, K., Saito, K., & Ito, A.
Progress in Earth and Planetary Science, 10:10 (2023)
Source apportionment of black carbon aerosols by isotopes (14C and 13C) and Bayesian modeling from two remote islands in east Asian outflow region
Uchida, M., Mantoku, K., Kumata, H., Kaneyasu, N., Handa, D. Arakaki, T., Kobayashi, T., Hatakeyama, S., Shibata, Y., & Kawamura, K.
Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms, 538C: 64-74 (2023)
Ultra small mass AMS 14C sample preparation and analyses at NIES-TERRA AMS facility
Uchida, M., Mantoku, K., Kobayashi, T., Kawamura, K., & Shibata, Y.
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 536, 144-153 (2023)
Issues of Atmospheric Chemistry in the Stratosphere and Mesosphere (in Japanese)
Archives of Atmospheric Chemistry Research, 48, 048A01 (2023)
Atmospheric Observations Suggest Methane Emissions in North-east China Growing with Natural Gas Use
Wang, F., Maksyutov, S., Janardanan, R., Tsuruta, A., Ito, A., Morino, I., Yoshida, Y., Tohjima, Y., Kaiser, J. W., Lan, X., Zhang, Y., Mammarella, I., Lavric, J. V., & Matsunaga, T.
Scientific Reports, 12 (2022)
Greenhouse gases and ozone depleting substances (in Japanese)
Archives of Atmospheric Chemistry Research, 47, 047A02 (2022)
Towards reconstructing the Arctic atmospheric methane history over the 20th century: measurement and modelling results for the North Greenland Ice Core Project firn
Umezawa, T., Sugawara, S., Kawamura, K., Oyabu, I., Andrews, S. J., Saito, T., Aoki, S., & Nakazawa, T.
Atmos. Chem. Phys., 22, 6899–6917 (2022)
Relation of leaf terpene contents to terpene emission profiles in Japanese cedar (Cryptomeria japonica)
Saito, T., Kusumoto, N., & Hiura, T.
Ecological Research (2022)
Did Atmospheric CO2 and CH4 Observation at Yonagunijima Detect Fossil-Fuel CO2 Reduction due to COVID-19 Lockdown?
Tohjima, Y., Niwa, Y., Tsuboi, K., & Saito, K.
Journal of the Meteorological Society of Japan, 100(2), 437-444, (2022)
Surface displacement induced by seasonal ground thaw, measured by synthetic aperture radar in the Daisetsu Mountains, Japan. (in Japanese)
Abe, T., Iwahana, G., Sone, T., & Uchida, M.
日本雪氷学会誌雪氷, 84巻1号, 13-27 (2022)
Composition of firn air at the North Greenland Ice Core Project (NGRIP) site
Kawamura, K., Umezawa, T., Sugawara, S., Ishidoya, S., Ishijima, K., Saito, T., Oyabu, I., Murayama, S., Morimoto, S., Aoki, S., & Nakazawa, T.
Polar Data Journal, 5, 89–98 (2021)
Projections of surface air temperature required to sustain permafrost and importance of adaptation to climate change in the Daisetsu Mountains, Japan
Yokohata, T., Iwahana, G., Sone, T., Saito, K., Ishizaki, N. N., Kubo, T., Oguma, H., & Uchida, M.
Scientific Reports, 11, 15518 (2021)
Estimation of fire-induced carbon emissions from Equatorial Asia in 2015 using in situ aircraft and ship observations
Niwa, Y., Sawa, Y., Nara, H., Machida, T., Matsueda, H., Umezawa, T., Ito, A., Nakaoka, S., Tanimoto, H., & Tohjima, Y.
Atmos. Chem. Phys., 21, 9455–9473 (2021)
Diversification of terpenoid emissions proposes a geographic structure based on climate and pathogen composition in Japanese cedar
Hiura, T., Yoshioka, H., Matsunaga, S. N., Saito, T., Kohyama, T. I., Kusumoto, N., Uchiyama, K., Suyama, Y., & Tsumura, Y.
Scientific Reports, 11: 8307 (2021)
A decline in emissions of CFC-11 and related chemicals from eastern China
Park, S., Western, L.M., Saito, T., Redington, A.L., Henne, S., Fang, X., Prinn, R.G., Manning, A.J., Montzka, S.A., Fraser, P.J., Ganesan, A.L., Harth, C.M., Kim, J., Krummel, P.B., Liang, Q., Mühle, J., O'Doherty, S., Park, H., Park, M. K., Reimann, S., Salameh, P.K., Weiss, R.F., & Rigby, M.
Nature (2021)