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J-GLOBAL ID：201301069125223819 Update date: Apr. 11, 2025

UMEZAWA Taku

ウメザワタク | UMEZAWA Taku

Research field (1)： Atmospheric and hydrospheric science

Research keywords (5)：炭素循環 , Methyl chloride , Aircraft observation , Isotope , Methane

Research theme for competitive and other funds (5)：

2023 - 2028 多成分気体分析に基づく成層圏物質循環の長期変動の評価
2024 - 2027 High-precision atmospheric measurements for estimating the spatial distribution, intensity, and location of methane emission hotspots in a mega city
2023 - 2026 過去30年間で成層圏の大気循環は変化したか?:ハロカーボンの新規測定にもとづく推定
2017 - 2021 Accurate reconstruction of variations of methane isotopes over the last 50 years using halocarbon measurements of firn air
2010 - 2012 A study of global methane cycle over the last 130 kyrs based on Antarctic and Greenland deep ice cores

Papers (42)：

Masahito Ueyama, Taku Umezawa, Yukio Terao, Mark Lunt, James Lawrence France. Evaluating urban methane emissions and their attributes in a megacity, Osaka, Japan, via mobile and eddy covariance measurements. 2025
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

MISC (29)：

Lectures and oral presentations (13)：

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)
B203 航空機を用いた日本上空の対流圏メタンの観測(物質循環,一般口頭発表)
(大会講演予講集 2011)
航空機を用いた日本上空の対流圏メタンの観測
(日本気象学会大会講演予稿集 2011)
Observations of greenhouse gases in the polar regions
(極域科学・宙空圏・気水圏・生物・地学シンポジウム講演予稿集(CD-ROM) 2010)
P148 西太平洋上部/下部対流圏でのメタン濃度と炭素・水素安定同位体比の季節変動
(大会講演予講集 2009)

Education (1)：

2004 - 2009 Tohoku University, Graduate School of Science Department of Geophysics

Work history (8)：

2025/04 - 現在 Tohoku University Graduate School of Science
2021/04 - 現在 National Institute for Environmental Studies
2020/07 - 2021/03 National Institute for Environmental Studies Center for Environmental Measurement and Analysis Senior Researcher
2017/04 - 2020/06 National Institute for Environmental Studies Center for Environmental Measurement and Analysis Researcher
2014/11 - 2017/03 National Institute for Environmental Studies Center for Global Environment Research Postdoctoral Researcher

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Committee career (1)：

Awards (2)：

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