地上ステーション・航空機・船舶を利用した温室効果ガス等のモニタリング、観測に要する研究基盤の維持管理、および海洋生態系への気候変動影響のモニタリングの推進ならびに関連する研究を行っています。
大気・海洋モニタリング推進室
研究スタッフ
ノゴビチン アレクサンダー
NOGOVITCYN Aleksandr
特別研究員
シベリアにおけるタワー観測ネットワークからの温室効果ガスデータの研究
秦 倩凝（シン セイネイ）
QIN Qianning
特別研究員
大気中温室効果ガスと亜寒帯生態系動態に関する時空間分析
田口 琢斗
TAGUCHI Takuto
准特別研究員
大気・陸面間の物質循環に関する研究
研究プロジェクト
研究成果
発表論文
Spatial and temporal occurrence of two Gyrodinium species in the seasonal ice zone off Wilkes Land, Southern Ocean
Matsuda, R., Sano, M., Tsuchiya, C., Takahashi, D.K., Takao, S., Mizobata, K., Moteki, M., Makabe, R., & Kurosawa, N.
Polar Science, 43, 101169, (2025)
The greenhouse gas observation mission with Global Observing SATellite for Greenhouse gases and Water cycle (GOSAT-GW): objectives, conceptual framework and scientific contributions
Tanimoto, H., Matsunaga, T., Someya, Y., Fujinawa, T., Ohyama, H., Morino, I., Yashiro, H., Sugita, T., Inomata, S., Müller, A., Saeki, T., Yoshida, Y., Niwa, Y., Saito, M., Noda, H., Yamashita, Y., Ikeda, K., Saigusa, N., Machida, T., Frey. M. M., Lim, H., Srivastava, P., Jin, Y., Shimizu, A., Nishizawa, T., Kanaya, Y., Sekiya, T., Patra, P., Takigawa, M., Bisht, J., Kasai, Y., & Sato, O. T.
Progress in Earth and Planetary Science, 12, 8 (2025)
Future collaboration between the USA and Japan for possible development of a Japan GHG Center
Tanimoto, H., Machida, T., Shirai, T., Niwa, Y., Matsunaga, T., Saeki, T., Yashiro, H., Saigusa, N., Someya, Y., Umezawa, T., Kanaya, Y., Patra,P., Sato, A., Sawa, Y., Suda, K., Kondo, M., Ito, A., Ochiai, O,. Suto, H., Okano, S., Ishihara, H., Tsuboi, K., Ohara, K., Takatsuji, S., Kawasaki, T., Kavvada, A., Lefer, B., Boukabara, S. A., Worden, J., Wooldridge, C., Kondragunta, S., Su, W., & Privetten, J.
Bulletin of the American Meteorological Society,106,1(2024)
Observed APO Seasonal Cycle in the Pacific: Estimation of Autumn O2 Oceanic Emissions
Tohjima, Y., Shirai, T., Ishizawa, M., Mukai, H., Machida,T., Sasakawa, M., Terao, Y., Tsuboi, K., Takao, S., & Nakaoka, S.
Global Biogeochemical Cycles, 38, 9, e2024GB008230 (2024)
Increasing methane emissions and widespread cold-season release from high-Arctic regions detected through atmospheric measurements
Ward, R. H., Sweeney, C., Miller, J. B., Goeckede, M., Laurila, T., Hatakka, J., Ivakov, V. , Sasakawa, M., Machida, T., Morimoto, S., Goto, D., & Ganesan, A. L.
Journal of Geophysical Research - Atmospheres, 129,11 (2024)
Contribution of marine macrophytes to pCO2 and DOC variations in human-impacted
Watanabe, K., Tokoro, T., Moki, H., & Kuwae, T.
Biogeochemistry (2024)
Changes in DIC/TA ratio by tidal asymmetry control pCO2 over a spring-neap tidal cycle in a subtropical mangrove forest in Japan
Nakamura, W., Naing, P. T., Watanabe, K., Tokoro, T., Gempei, K., Endo, T., Kuwae, T., & Sasaki, J.
Geochemical Journal, 58, 1, 28–45 (2024)
Ship- and aircraft-based XCH4 over oceans as a new tool for satellite validation
Müller, A., Tanimoto, H., Sugita, T., Patra, P. K., Nakaoka, S.-I., Machida, T., Morino, I., Butz, A., & Shiomi, K.
Atmospheric Measurement Techniques, 17, 4, 1297–1316 (2024)
Global Carbon Budget 2023
Friedlingstein, P., O'Sullivan, M., Jones, M. W., Andrew, R. M., Bakker, D. C. E., Hauck, J., Landschützer, P., Le Quéré, C., Luijkx, I. T., Peters, G. P., Peters, W., Pongratz, J., Schwingshackl, C., Sitch, S., Canadell, J. G., Ciais, P., Jackson, R. B., Alin, S. R., Anthoni, P., Barbero, L., Bates, N. R., Becker, M., Bellouin, N., Decharme, B., Bopp, L., Brasika, M., Cadule , P., Chamberlain, M. A., Chandra, N., Chau, T.-T.-T., Chevallier, F., Chini, L. P., Cronin, M., Dou, X., Enyo, K., Evans, W., Falk, S., Feely, R. A., Feng, L., Ford, D. J., Gasser, T., Ghattas, J., Gkritzalis, T., Grassi, G., Gregor, L., Gruber, N., Gürses, Ö., Harris, I., Heinke, J., Houghton, R. A., Hurtt, G. C., Iida, Y., Ilyina, T., Jacobson, A. R., Jain, A., Jarníková, T., Jersild, A., Jiang, F., Jin, Z., Joos, F., Kato, E., Keeling, R. F., Kennedy, D., Goldewijk, K. K., Knauer, J., Körtzinger, A., Lefèvre, N., Li, H., Liu, J., Liu, Z., Ma, L., Mayot, N., McGuire, P., McKinley, G. A., Meyer, G., Morgan, E. J., Munro, D. R., Nakaoka, S.-I., Niwa, Y., O'Brien, K. M., Olsen, A., Omar, A. M., Ono, T., Paulsen, M. E., Pierrot, D., Pocock, K., Poulter, B., Powis, C., Rehder, G., Resplandy, L., Robertson, E., Rödenbeck, C., Rosan, T. M., Schwinger, J., Séférian, R., Smallman, L., Smith, S., Sospedra-Alfonso, R., Sun, Q., Sutton, A. J., Sweeney, C., Takao, S., Tian, H., Tilbrook, B., Tsujino, H., Tubiello, F., van der Werf, G., van Ooijen, E., Wanninkhof, R., Watanabe, M., Wimart-Rousseau, C., Yang, D., Yang, X., Yuan, W., Yue, X., Zaehle, S., Zeng, J., & Zheng, B.
Earth System Science Data, 15, 5301–5369 (2023)
Statistical Analysis of Spatiotemporal Variations of Air-Sea CO2 Fluxes in the Kuroshio Region
Tokoro, T., Nakaoka, S., Takao, S., Saito, S., Sasano, D., Enyo, K., Ishii, M., Kosugi, N., & Nojiri, Y.
Journal of Geophysical Research: Oceans, 128, e2023JC019762 (2023)
Fecal Pellet-Like Gyrodinium Species in Sinking Particles: Newly Found Potential Contributors for Carbon Export in the Antarctic Seasonal Ice Zone
Matsuda, R., Makabe, R., Sano, M., Takao, S., Moteki, M., & Kurosawa, N.
Journal of Geophysical Research: Biogeosciences, 128, 10 e2023JG00770
Estimating methane emissions in the Arctic nations using surface observations from 2008 to 2019
Wittig, S., Berchet, A., Pison, I., Saunois, M., Thanwerdas, J., Martinez, A., Paris, J.-D., Machida, T., Sasakawa, M., Worthy, D. E. J., Lan, X., Thompson, R. L., Sollum, E., & Arshinov, M.
Atmospheric Chemistry and Physics, 23, 11, 6457–6485 (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)
Autumn cooling paused increased CO2 release in central Eurasia
Kondo, M., Sasakawa, M., Machida, T., Arshinov, M., & Hiyama, T.
Nature Climate Change, 12, 380–385 (2023)
Meridional Variability in Multi-Decadal Trends of Dissolved Inorganic Carbon in Surface Seawater of the Western North Pacific Along the 165°E Line
Ono, H., Toyama, K., Enyo, K., Iida, Y., Sasano, D., Nakaoka, S.-I., & Ishii, M.
Journal of Geophysical Research: Oceans, 128, e2022JC018842 (2023)
Global Carbon Budget 2022
Friedlingstein, P., O’Sullivan, M., Jones, M. W., Andrew, R. M., Gregor, L., Hauck, J., Le Quéré, C., Luijkx, I. T., Olsen, A., Peters, G. P., Peters, W., Pongratz, J., Schwingshackl, C., Sitch, S., Canadell, J. G., Ciais, P., Jackson, R. B., Alin, S., Alkama, R., Arneth, A., Arora, V. K., Bates, N. R., Becker, M., Bellouin, N., Bittig, H. C., Bopp, L., Chevallier, F., Chini, L. P., Cronin, M., Evans, W., Falk, S., Feely, R. A., Gasser, T., Gehlen, M., Gkritzalis, T., Gloege, L., Grassi, G., Gruber, N., Gürses, Ö., Harris, I., Hefner, M., Houghton, R. A., C. Hurtt, G. C., Iida, Y., Ilyina, T., Jain, A. K., Jersild, A., Kadono, K., Kato, E., Kennedy, D., Goldewijk, K. K., Knauer, J., Korsbakken, J. I., Landschützer, P., Lefèvre, N., Lindsay, K., Liu, J., Liu, Z., Marland, G., Mayot, N., McGrath, M. J., Metzl, N., Monacci, N. M., Munro, D. R., Nakaoka, S.-I., Niwa, Y., O'Brien, K., Ono, T., Palmer, P. I., Pan, N., Pierrot, D., Pocock, K., Poulter, B., Resplandy, L., Robertson, E., Rödenbeck, C., Rodriguez, C., Rosan, T. M., Schwinger, J., Séférian, R., Shutler, J. D., Skjelvan, I., Steinhoff, T., Sun, Q., Sutton, A. J., Sweeney, C., Takao, S., Tanhua, T., Tans, P. P., Tian, X., Tian, H., Tilbrook, B., Tsujino, H., Tubiello, F., van der Werf, G. R., P. Walker, A. P., Wanninkhof, R., Whitehead, C., Wranne, A. W., Wright, R., Yuan, W., Yue, C., Yue, X., Zaehle, S., Zeng, J., & Zheng, B.
Earth Syst. Sci. Data, 14, 4811–4900 (2022)
Estimating emissions of methane consistent with atmospheric measurements of methane and δ13 of methane
Basu, S., Lan, X., Dlugokencky, E., Miche, S., Schwietzke, S., Miller, J. B., Bruhwiler, L., Oh, Y., Tans, P. P., Apadula, F., Gatti, L. V., Jordan, A., Necki, J., Sasakawa, M., Morimoto, S., Di Iorio, T., Lee, H., Arduini, J., & Manca, G.
Atmos. Chem. Phys., 22, 15351–15377 (2022)
Phytoplankton and ice-algal communities in the seasonal ice zone during January (Southern Ocean, Indian sector)
Takahashi, K. D., Makabe, R., Takao, S., Kashiwase, H., & Moteki, M.
Journal of Oceanography (2022)
Global Carbon Budget 2021
Friedlingstein, P., Jones, M. W., O'Sullivan, M., Andrew, R. M., Bakker, D. C. E., Hauck, J., Le Quéré, C., Peters, G. P., Peters, W., Pongratz, J., Sitch, S., Canadell, J. G., Ciais, P., Jackson, R. B., Alin, S. R., Anthoni, P., Bates, N. R., Becker, M., Bellouin, N., Bopp, L., Chau, T. T. T., Chevallier, F., Chini, L. P., Cronin, M., Currie, K. I., Decharme, B., Djeutchouang, L. M., Dou, X., Evans, W., Feely, R. A., Feng, L., Gasser, T., Gilfillan, D., Gkritzalis, T., Grassi, G., Gregor, L., Gruber, N., Gürses, Ö., Harris, I., Houghton, R. A., Hurtt, G. C., Iida, Y., Ilyina, T., Luijkx, I. T., Jain, A., Jones, S. D., Kato, E., Kennedy, D., Klein Goldewijk, K., Knauer, J., Korsbakken, J. I., Körtzinger, A., Landschützer, P., Lauvset, S. K., Lefèvre, N., Lienert, S., Liu, J., Marland, G., McGuire, P. C., Melton, J. R., Munro, D. R., Nabel, J. E. M. S., Nakaoka, S.-I., Niwa, Y., Ono, T., Pierrot, D., Poulter, B., Rehder, G., Resplandy, L., Robertson, E., Rödenbeck, C., Rosan, T. M., Schwinger, J., Schwingshackl, C., Séférian, R., Sutton, A. J., Sweeney, C., Tanhua, T., Tans, P. P., Tian, H., Tilbrook, B., Tubiello, F., van der Werf, G. R., Vuichard, N., Wada, C., Wanninkhof, R., Watson, A. J., Willis, D., Wiltshire, A. J., Yuan, W., Yue, C., Yue, X., Zaehle, S., & Zeng, J.
Earth Syst. Sci. Data, 14, 1917–2005 (2022)
国立環境研究所における温室効果ガスモニタリングの基盤環境（地上観測局・温室効果ガス測定装置・標準ガス）
笹川基樹, 町田敏暢
国立環境研究所による民間貨物船舶を用いた大気・海洋温室効果ガス観測と海洋CO2 吸収量評価への貢献
中岡慎一郎, 高尾信太郎
航空機を利用した温室効果ガス観測
将来の地球観測への期待
佐藤啓市, 池田恒平, 寺尾有希夫, 山下陽介, 町田敏暢, 谷本浩志
Seasonal Variations and Drivers of Surface Ocean pCO2 in the Seasonal Ice Zone of the Eastern Indian Sector, Southern Ocean
Tozawa, M., Nomura, D., Nakaoka, S., Kiuchi, M., Yamazaki, K., Hirano, D., Aoki, S., Sasaki, H., & Murase, H.
Journal of Geophysical Research: Oceans, 126, e2021JC017953 (2021)
Measurement report: Regional characteristics of seasonal and long-term variations in greenhouse gases at Nainital, India, and Comilla, Bangladesh
Nomura, S., Naja, M., M. Ahmed, K., Mukai, H., Terao, Y., Machida, T., Sasakawa, M., & Patra, P. K.
Atmos. Chem. Phys., 21, 16427-16452 (2021)
Continuous monitoring and future projection of ocean warming, acidification, and deoxygenation on the subarctic coast of Hokkaido, Japan
Fujii, M., Takao, S., Yamaka, T., Akamatsu, T., Fujita, Y., Wakita, M., Yamamoto, A., & Ono, T.
Frontiers in Marine Science (2021)
北海道のバックグラウンド地域における粒子状物質の長期変動
大塚英幸, 秋山雅行, 向井人史, 橋本茂, 笹川基樹
大気環境学会誌, 第56巻第4号, 69-81 (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)
New approach to evaluate satellite-derived XCO2 over oceans by integrating ship and aircraft observations
Müller, A., Tanimoto, H., Sugita, T., Machida, T., Nakaoka, S., Patra, P. K., Laughner, J., & Crisp, D.
Atmos. Chem. Phys., 21, 8255–8271 (2021)
Contribution of Biological Effects to Carbonate-System Variations and the Air-Water CO2 Flux in Urbanized Bays in Japan
Tokoro, T., Nakaoka, S., Takao, S., Kuwae, T., Kubo, A., Endo, T., & Nojiri, Y.
Journal of Geophysical Research: Oceans, 126, e2020JC016974 (2021)
Reduction in Riverine Freshwater Supply Changes Inorganic and Organic Carbon Dynamics and Air-Water CO2 Fluxes in a Tropical Mangrove Dominated Estuary
Akhand, A., Chanda, A., Watanabe, K., Das, S., Tokoro, T., Hazra, S., & Kuwae, T.
Journal of Geophysical Research: Biogeosciences, 126, e2020JG006144 (2021)
Global Trends in Air‐Water CO2 Exchange Over Seagrass Meadows Revealed by Atmospheric Eddy Covariance
Van Dam, B., Polsenaere, P., Barreras-Apodaca, A., Lopes, C., Sanchez-Mejia, Z., Tokoro, T., Kuwae, T., Loza, L. G., Rutgersson, A., Fourqurean, J., & Thomas, H.
Global Biogeochemical Cycles, 35, e2020GB006848 (2021)
Low CO2 evasion rate from the mangrove-surrounding waters of the Sundarbans
Akhand, A., Chanda, A., Watanabe, K., Das, S., Tokoro, T., Chakraborty, K., Hazra, S., & Kuwae, T.
Biogeochemistry, 153:95-114 (2021)
Lateral carbon fluxes and CO2 evasion from a subtropical mangrove-seagrass-coral continuum
Akhand, A., Watanabe, K., Chanda, A., Tokoro, T., Kunal Chakraborty, K., Moki, H., Tanaya, T., Ghosh, J., & Kuwae, T.
Science of the Total Environment, 752, 142190 (2021)
Seasonal variations of SF6, CO2, CH4, and N2O in the UT/LS region due to emissions, transport, and chemistry
Bisht, J. S. H., Machida, T., Chandra, N., Tsuboi, K., Patra, P. K., Umezawa, T., Niwa, Y., Sawa, Y., Morimoto, S., Nakazawa, T., Saitoh, N., & Takigawa, M.
Journal of Geophysical Research: Atmospheres, 126, e2020JD033541 (2021)
Technical note: A high-resolution inverse modelling technique for estimating surface CO2 fluxes based on the NIES-TM-FLEXPART coupled transport model and its adjoint
Maksyutov, S., Oda, T., Saito, M., Janardanan, R., Belikov, D., Kaiser, J. E., Zhuravlev, R., Ganshin, A., Valsala, V. K., Andrews, A., Chmura, L., Dlugokencky, E., Haszpra, L., Langenfelds, R. L., Machida, T., Nakazawa, T., Ramonet, M., Sweeney, C., & Worthy, D.
Atmos. Chem. Phys., 21, 1245-1266 (2021)
Global Carbon Budget 2020
Friedlingstein, P., O'Sullivan, M., Jones, M. W., Andrew, R. M., Hauck, J., Olsen, A., Peters, G. P., Peters, W., Pongratz, J., Sitch, S., Le Quéré, C., Canadell, J. G., Ciais, P., Jackson, R. B., Alin, S., Aragão, L. E. O. C., Arneth, A., Arora, V., Bates, N. R., Becker, M., Benoit-Cattin, A., Bittig, H. C., Bopp, L., Bultan, S., Chandra, N., Chevallier, F., Chini, L. P., Evans, W., Florentie, L., Forster, P. M., Gasser, T., Gehlen, M., Gilfillan, D., Gkritzalis, T., Gregor, L., Gruber, N., Harris, I., Hartung, K., Haverd, V., Houghton, R. A., Ilyina, T., Jain, A. K., Joetzjer, E., Kadono, K., Kato, E., Kitidis, V., Korsbakken, J. I., Landschützer, P., Lefèvre, N., Lenton, A., Lienert, S., Liu, Z., Lombardozzi, D., Marland, G., Metzl, N., Munro, D. R., Nabel, J. E. M. S., Nakaoka, S.-I., Niwa, Y., O'Brien, K., Ono, T., Palmer, P. I., Pierrot, D., Poulter, B., Resplandy, L., Robertson, E., Rödenbeck, C., Schwinger, J., Séférian, R., Skjelvan, I., Smith, A. J. P., Sutton, A. J., Tanhua, T., Tans, P. P., Tian, H., Tilbrook, B., van der Werf, G., Vuichard, N., Walker, A. P., Wanninkhof, R., Watson, A. J., Willis, D., Wiltshire, A. J., Yuan, W., Yue, X., and Zaehle, S.
Earth Syst. Sci. Data, 12, 3269-3340 (2020)
Siberian and temperate ecosystems shape Northern Hemisphere atmospheric CO2 seasonal amplification
Lin, X., Rogers, B. M., Sweeney, C., Chevallier, F., Arshinov, M., Dlugokencky, E., Machida, T., Sasakawa, M., Tans, P., & Keppel-Aleksa, G.
PNAS (2020)
The Global Methane Budget 2000-2017
Saunois, M., Stavert, A. R., Poulter, B., Bousquet, P., Canadell, J. G., Jackson, R. B., Raymond, P. A., Dlugokencky, E. J., Houweling, S., Patra, P. K., Ciais, P., Arora, V. K., Bastviken, D., Bergamaschi, P., Blake, D. R., Brailsford, G., Bruhwiler, L., Carlson, K. M., Carrol, M., Castaldi, S., Chandra, N., Crevoisier, C., Crill, P. M., Covey, K., Curry, C. L., Etiope, G., Frankenberg, C., Gedney, N., Hegglin, M. I., Hoglund-Isaksson, L., Hugelius, G., Ishizawa, M., Ito, A., Janssens-Maenhout, G., Jensen, K. M., Joos, F., Kleinen, T., Krummel, P. B., Langenfelds, R, L., Laruelle, G. G., Liu, L., Machida, T., Maksyutov, S., McDonald, K. C., McNorton, J., Miller, P. A., Melton, J. R., Morino, I., Muller, J., Murguia-Flores, F., Naik, V., Niwa, Y., Noce, S., O’Doherty, S., Parker, R. J., Peng, C., Peng, S., Peters, G. P., Prigent, C., Prinn, R., Ramonet, M., Regnier, P., Riley, W. J., Rosentreter, J. A., Segers, A., Simpson, I. J., Shi, H., Smith, S. J., Paul Steele, L., Thornton, B. F., Tian, H., Tohjima, Y., Tubiello, F. N., Tsuruta, A., Viovy, N., Voulgarakis, A., Weber, T. S., van Weele, M., van der Werf, G. R., Weiss, R. F., Worthy, D., Wunch, D., Yin, Y., Yoshida, Y., Zhang, W., Zhang, Z., Zhao, Y., Zheng, B., Zhu, Q., Zhu, Q., & Zhuang, Q.
Earth System Science Data 12, 1561-1623 (2020)
Strong biological carbon uptake and carbonate chemistry associated with dense shelf water outflows in the Cape Darnley polynya, East Antarctica
Murakami, K., Nomura, D., Hashida, G., Nakaoka, S., Kitade, Y., Hirano, D., Hirawake, T. & Ohshima, K. I.
Marine Chemistry 225, 103842 (2020)
Statistical characterization of urban CO2 emission signals observed by commercial airliner measurements
Umezawa, T., Matsueda, H., Oda, T., Higuchi, K., Sawa, Y., Machida, T., Niwa, Y. & Maksyutov, S.
Scientific Reports 10:7963 (2020)
Effects of phytoplankton community composition and productivity on sea surface pCO2 variations in the Southern Ocean
Takao, S., Nakaoka, S., Hashihama, F., Shimada, K., Yoshikawa-Inoue, H., Hirawake, T., Kanda, J., Hashida, G. & Suzuki, K.
Deep-Sea Research Part I (2020)
Country-Scale Analysis of Methane Emissions with a High-Resolution Inverse Model Using GOSAT and Surface Observations
Janardanan, R., Maksyutov, S., Tsuruta, A., Wang, F., Tiwari, Y. K., Valsala, V., Ito, A., Yoshida, Y., Kaiser, J. W., Janssens-Maenhout, G., Arshinov, M., Sasakawa, M., Tohjima, Y., Worthy, D. E. J., Dlugokencky, E. J., Ramonet, M., Arduini, J., Lavric, J. V., Piacentino, S., Krummel, P. B., Langenfelds, R. L., Mammarella, I. & Matsunaga, T.
Remote Sensing 12(3), 375 (2020)
Analysis of the Diurnal, Weekly, and Seasonal Cycles and Annual Trends in Atmospheric CO2 and CH4 at Tower Network in Siberia from 2005 to 2016
Belikov, D., Arshinov, M., Belan, B., Davydov, D., Fofonov, A., Sasakawa, M. & Machida, T.
Atmosphere 10(11), 689 (2019)
Methane Emission Estimates by the Global High-Resolution Inverse Model Using National Inventories
Wang, F., Maksyutov, S., Tsuruta, A., Janardanan, R., Ito, A., Sasakawa, M., Machida, T., Morino, I., Yoshida, Y., Kaiser, J. W., Janssens-Maenhout, G., Dlugokencky, E., Mammarella, I., Lavric, J. V. & Matsunaga, T.
Remote Sensing 11(21), 2489 (2019)
Global carbon budgets estimated from atmospheric O2/N2 and CO2 observations in the western Pacific region over a 15-year period
Tohjima, Y., Mukai, H., Machida, T., Hoshina, Y. & Nakaoka, S.
Atmospheric Chemistry and Physics 19, 9269-9285 (2019)
A global synthesis inversion analysis of recent variability in CO2 fluxes using GOSAT and in situ observations
Wang, J. S., Kawa, S. R., Collatz, G. J., Sasakawa, M., Gatti, L. V., Machida, T., Liu, Y. P. & Manyin, M. E.
Atmospheric Chemistry and Physics 18, 11097-11124 (2018)
Three-dimensional methane distribution simulated with FLEXPART 8-CTM-1.1 constrained with observation data
Zwaaftink, C. D. G., Henne, S., Thompson, R. L., Dlugokencky, E. J., Machida, T., Paris, J.-D., Sasakawa, M., Segers, A., Sweeney, C. & Stohl, A.
Geosci. Model Dev. 11, 4469-4487 (2018)
In situ observation of atmospheric oxygen and carbon dioxide in the North Pacific using a cargo ship
Hoshina, Y., Tohjima, Y., Katsumata, K., Machida, T. & Nakaoka, S.
Atmos. Chem. Phys. 18, 9283-9295 (2018)
Methane fluxes in the high northern latitudes for 2005-2013 estimated using a Bayesian atmospheric inversion
Thompson, R. L., Sasakawa, M., Machida, T., Aalto, T., Worthy, D., Lavric, J. V., Myhre, C. L. & Stohl, A.
Atmospheric Chemistry and Physics 17, 3553-3572 (2017)
A 4D-Var inversion system based on the icosahedral grid model (NICAM-TM 4D-Var v1.0) - Part 1: Offline forward and adjoint transport models
Niwa, Y., Tomita, H., Satoh, M., Imasu, R., Sawa, Y., Tsuboi, K., Matsueda, H., Machida, T., Sasakawa, M., Belan, B. & Saigusa, N.
Geoscientific Model Development 10, 1157-1174 (2017)
Emission factors of CO2, CO and CH4 from Sumatran peatland fires in 2013 based on shipboard measurements
Nara, H., Tanimoto, H., Tohjima, Y., Mukai, H., Nojiri, Y. & Machida, T.
Tellus B 69, 1399047 (2017)
Temporal Characteristics of CH4 Vertical Profiles Observed in the West Siberian Lowland Over Surgut From 1993 to 2015 and Novosibirsk From 1997 to 2015
Sasakawa, M., Machida, T., Ishijima, K., Arshinov, M., Patra, P. K., Ito, A., Aoki, S. & Petrov, V.
Journal of Geophysical Research: Atmospheres 122, 11,261-11,273 (2017)
Reconciliation of top-down and bottom-up CO2 fluxes in Siberia larch forest
Takata, K., Patra, P. K., Kotani, A., Mori, J., Belikov, D., Ichii, K., Saeki, T., Ohta, T., Saito, K., Ueyama, M., Ito, A., Maksyutov, S., Miyazaki, S., Burke, E. J., Ganshin, A., Iijima, Y., Ise, T., Machiya, H., Maximov, T. C., Niwa, Y., O’ishi, R., Park, H., Sasai, T., Sato, H., Tei, S., Zhuravlev, R., Machida, T., Sugimoto, A. & Aoki, S.
Environ. Res. Lett. (2017)
Variability and quasi-decadal changes in the methane budget over the period 2000-2012
Saunois, M., Bousquet, P., Poulter, B., Peregon, A., Ciais, P., Canadell, J. G., Dlugokencky, E. J., Etiope, G., Bastviken, D., Houweling, S., Janssens-Maenhout, G., Tubiello, F. N., Castaldi, S., Jackson, R. B., Alexe, M., Arora, V. K., Beerling, D. J., Bergamaschi, P., Blake, D. R., Brailsford, G., Bruhwiler, L., Crevoisier, C., Crill, P., Covey, K., Frankenberg, C., Gedney, N., Hoglund-Isaksson, L., Ishizawa, M., Ito, A., Joos, F., Kim, H.-S., Kleinen, T., Krummel, P., Lamarque, J.-F., Langenfelds, R., Locatelli, R., Machida, T., Maksyutov, S., Melton, J. R., Morino, I., Naik, V., O’Doherty, S., Parmentier, F.-J. W., Patra, P. K., Peng, C., Peng, S., Peters, G. P., Pison, I., Prinn, R., Ramonet, M., Riley, W. J., Saito, M., Santini, M., Schroeder, R., Simpson, I. J., Spahni, R., Takizawa, A., Thornton, B. F., Tian, H., Tohjima, Y., Viovy, N., Voulgarakis, A., Weiss, R., Wilton, D. J., Wiltshire, A., Worthy, D., Wunch, D., Xu, X., Yoshida, Y., Zhang, B., Zhang, Z. & Zhu, Q.
Atmos. Chem.Phys. 17, 11135-11161 (2017)
Six years of atmospheric CO2 observations at Mt. Fuji recorded with a battery-powered measurement system
Nomura, S., Mukai, H., Terao, Y., Machida, T. & Nojiri, Y.
Atmos. Meas. Tech. 10, 667-680 (2017)
Impact of Siberian observations on the optimization of surface CO2 flux
Kim, J., Kim, H. M., Cho, C.-H., Boo, K. O., Jacobson, A. R., Sasakawa, M., Machida, T., Arshinov, M. & Fedoseev, N.
Atmos. Chem. Phys. 17, 2881-2899 (2017)
Adjoint of the global Eulerian-Lagrangian coupled atmospheric transport model (A-GELCA v1.0): development and validation
Belikov, D. A., Maksyutov, S., Yaremchuk, A., Ganshin, A., Kaminski, T., Blessing, S., Sasakawa, M., Gomez-Pelaez, A. J. & Starchenko, A.
Geoscientific Model Development 9, 749-764 (2016)
The global methane budget 2000-2012
Saunois, M., Bousquet, P., Poulter, B., Peregon, A., Ciais, P., Canadell, J. G., Dlugokencky, E. J., Etiope, G., Bastviken, D., Houweling, S., Janssens-Maenhout, G., Tubiello, F. N., Castaldi, S., Jackson, R. B., Alexe, M., Arora, V. K., Beerling, D. J., Bergamaschi, P., Blake, D. R., Brailsford, G., Brovkin, V., Bruhwiler, L., Crevoisier, C., Crill, P., Covey, K., Curry, C., Frankenberg, C., Gedney, N., Hoglund-Isaksson, L., Ishizawa, M., Ito, A., Joos, F., Kim, H.-S., Kleinen, T., Krummel, P., Lamarque, J.-F., Langenfelds, R., Locatelli, R., Machida, T., Maksyutov, S., McDonald, K. C., Marshall, J., Melton, J. R., Morino, I., Naik, V., O’Doherty, S., Parmentier, F.-J. W., Patra, P. K., Peng, C., Peng, S., Peters, G. P., Pison, I., Prigent, C., Prinn, R., Ramonet, M., Riley, W. J., Saito, M., Santini, M., Schroeder, R., Simpson, I. J., Spahni, R., Steele, P., Takizawa, A., Thornton, B. F., Tian, H., Tohjima, Y., Viovy, N., Voulgarakis, A., van Weele, M., van der Werf, G. R., Weiss, R., Wiedinmyer, C., Wilton, D. J., Wiltshire, A., Worthy, D., Wunch, D., Xu, X., Yoshida, Y., Zhang, B., Zhang, Z. & Zhu, Q.
Earth Syst. Sci. Data 8, 697-751 (2016)
Winter crop CO2 uptake inferred from CONTRAIL measurements over Delhi, India
Umezawa, T., Niwa, Y., Sawa, Y., Machida, T. & Matsueda, H.
Geophys. Res. Lett. 43 (2016)
Global Carbon Budget 2016
Quere, C. L., Andrew, R. M., Canadell, J. G., Sitch, S., Korsbakken, J. I., Peters, G. P., Manning, A. C., Boden, T. A., Tans, P. P., Houghton, R. A., Keeling, R. F., Alin, S., Andrews, O. D., Anthoni, P., Barbero, L., Bopp, L., Chevallier, F., Chini, L. P., Ciais, P., Currie, K., Delire, C., Doney, S. C., Friedlingstein, P., Gkritzalis, T., Harris, I., Hauck, J., Haverd, V., Hoppema, M., Goldewijk, K. K., Jain, A. K., Kato, E., Kortzinger, A., Landschutzer, P., Lefevre, N., Lenton, A., Lienert, S., Lombardozzi, D., Melton, J. R., Metzl, N., Millero, F., Monteiro, P. M. S., Munro, D. R., Nabel, J. E. M. S., Nakaoka, S., O’Brien, K., Olsen, A., Omar, A. M., Ono, T., Pierrot, D., Poulter, B., Rodenbeck, C., Salisbury, J., Schuster, U., Schwinger, J., Seferian, R., Skjelvan, I., Stocker, B. D., Sutton, A. J., Takahashi, T., Tian, H., Tilbrook, B., van der Laan-Luijkx, I. T., van der Werf, G. R., Viovy, N., Walker, A. P., Wiltshire, A. J. & Zaehle, S.
Earth Syst. Sci. Data 8, 1-45 (2016)
A multi-decade record of high-quality fCO2 data in version 3 of the Surface Ocean CO2 Atlas (SOCAT)
Bakker, D. C. E., Pfeil, B., Landa, C. S., Metzl, N., O’Brien, K. M., Olsen, A., Smith, K., Cosca, C., Harasawa, S., Jones, S. D., Nakaoka, S., Nojiri, Y., Schuster, U., Steinhoff, T., Sweeney, C., Takahashi, T., Tilbrook, B., Wada, C., Wanninkhof, R., Alin, S. R., Balestrini, C. F., Barbero, L., Bates, N. R., Bianchi, A. A., Bonou, F., Boutin, J., Bozec, Y., Burger, E. F., Cai, W.-J., Castle, R. D., Chen, L., Chierici, M., Currie, K., Evans, W., Featherstone, C., Feely, R. A., Fransson, A., Goyet, C., Greenwood, N., Gregor, L., Hankin, S., Hardman-Mountford, N. J., Harlay, J., Hauck, J., Hoppema, M., Humphreys, M. P., Hunt, C. W., Huss, B., Ibanhez, J. S. P., Johannessen, T., Keeling, R., Kitidis, V., Kortzinger, A., Kozyr, A., Krasakopoulou, E., Kuwata, A., Landschutzer, P., Lauvset, S. K., Lefevre, N., Monaco, C. L., Manke, A., Mathis, J. T., Merlivat, L., Millero, F. J., Monteiro, P. M. S., Munro, D. R., Murata, A., Newberger, T., Omar, A. M., Ono, T., Paterson, K., Pearce, D., Pierrot, D., Robbins, L. L., Saito, S., Salisbury, J., Schlitzer, R., Schneider, B., Schweitzer, R., Sieger, R., Skjelvan, I., Sullivan, K. F., Sutherland, S. C., Sutton, A. J., Tadokoro, K., Telszewski, M., Tuma, M., Van Heuven, S. M. A. C., Vandemark, D., Ward, B., Watson, A. J. & Xu, S.
Earth Syst. Sci. Data 8, 383-413 (2016)
Bias corrections of GOSAT SWIR XCO2 and XCH4 with TCCON data and their evaluation using aircraft measurement data
Inoue, M., Morino, I., Uchino, O., Nakatsuru, T., Yoshida, Y., Yokota, T., Wunch, D., Wennberg, P. O., Roehl, C. M., Griffith, D. W. T., Velazco, V. A., Deutscher, N. M., Warneke, T., Notholt, J., Robinson, J., Sherlock, V., Hase, F., Blumenstock, T., Rettinger, M., Sussmann, R., Kyro, E., Kivi, R., Shiomi, K., Kawakami, S., De Maziere, M., Arnold, S. G., Dietrich, G. Feist, D. G., Barrow, E. A, Barney, J., Dubey, M., Schneider, M., Iraci, L. T., Podolske, J. R., Hillyard, P. W., Machida, T., Sawa, Y., Tsuboi, K., Matsueda, H., Sweeney, C., Tans, P. P., Andrews, A. E., Biraud, S. C., Fukuyama, Y., Pittman, J. V., Kort, E. A. & Tanaka, T.
Atmos. Meas. Tech. 9, 3491-3512 (2016)
Long-term variability of surface nutrient concentrations in the North Pacific
Yasunaka, S., Ono, T., Nojiri, Y., Whitney, F. A., Wada, C., A. Murata, A., Nakaoka, S. & Hosoda, S.
Geophys. Res. Lett. 43, 3389-3397 (2016)
Top-down assessment of the Asian carbon budget since the mid 1990s
Thompson, R. L., Patra, P. K., Chevallier, F., Maksyutov, S., Law, R. M., Ziehn, T., van der Laan-Luijkx, I. T., Peters, W., Ganshin, A., Zhuravlev, R., Maki, T., Nakamura, T., Shirai, T., Ishizawa, M., Saeki, T., Machida, T., Poulter, B., Canadell, J. G. & Ciais, P.
Nature Communications 7, 10724 (2016)
Regional methane emission estimation based on observed atmospheric concentrations (2002-2012)
Patra, P. K., Saeki, T., Dlugokencky, E. J., Ishijima, K., Umezawa, T., Ito, A., Aoki, S., Morimoto, S., Kort, E. A., Crotwell, A., Ravi Kumar, K. & Nakazawa, T.
J. Meteor. Soc. Japan 94(1), 91-113 (2016)