足立　光司　／　Kouji Adachi

事項 詳細
所属・職名 全球大気海洋研究部・第三研究室・主任研究官
連絡先 jiadachikoujiad
専門分野 環境科学、地球科学、大気科学
学位 博士（理学）
受賞歴、委員等 受賞歴
  • 奨励賞（日本エアロゾル学会）[電子顕微鏡を用いた個別粒子単位での形態、混合状態、物理化学特性に関する研究],2016年8月
委員
  • 2026.08.27-　エアロゾル学会常任理事
  • 2026.08.27-　エアロゾル学会編集委員
  • 2017.04.01-09.30　神戸大学　国際人間科学部　非常勤講師
  • 2017.04.01-21.03.31　東京理科大学　総合研究院　客員准教授
発表論文 主著論文 (All publifications Google Scholar)
  • Adachi, K. , Dibb, J. E., Lee, M., Symonds, G., Kim, D., Campuzano-Jost, P., Jimenez, J. L., and Crawford, J. H.: Regional fireworks pollution over East and Southeast Asia from airborne observations around the Spring Festival period, ACS ES&T Air, 3, 2270–2278, https://doi.org/10.1021/acsestair.6c00106, 2026.
  • Adachi, K. , Yoshida, A., Mori, T., Moteki, N., Ohata, S., Kita, K., Kawai, Y., and Koike, M.: Individual particle compositions and aerosol mixing states at different altitudes over the ocean in East Asia, Atmos. Chem. Phys., 25, 12599–12613, https://doi.org/10.5194/acp-25-12599-2025, 2025.
  • Adachi, K. , Sun, C., Onchang, R., and Takegawa, N.: Homogeneous mixing of sea spray and biomass burning tracer elements within single particles observed over Southeast Asia, J. Geophys. Res.-Atmos., 130, e2024JD042328, https://doi.org/10.1029/2024JD042328, 2025.
  • Adachi, K. : Transmission Electron Microscopy for Studying Atmospheric Soot Particles, in: Microanalysis of Atmospheric Particles, 163–175, 2025.
  • Adachi, K. , Dibb, J. E., Katich, J. M., Schwarz, J. P., Guo, H., Campuzano-Jost, P., Jimenez, J. L., Peischl, J., Holmes, C. D., and Crawford, J. H.: Occurrence, abundance, and formation of atmospheric tarballs from a wide range of wildfires in the western US, Atmos. Chem. Phys., 24, 10985–11004, https://doi.org/10.5194/acp-24-10985-2024, 2024.
  • Adachi, K. , Tobo, Y., Oshima, N., Yoshida, A., Ohata, S., Krejci, R., Massling, A., Skov, H., and Koike, M.: Composition and mixing state of individual aerosol particles from northeast Greenland and Svalbard in the Arctic during spring 2018, Atmos. Environ., 314, 120083, https://doi.org/10.1016/j.atmosenv.2023.120083, 2023.
  • Adachi, K. , Tobo, Y., Koike, M., Pereira Freitas, G., Zieger, P., and Krejci, R.: Composition and mixing state of Arctic aerosol and cloud residual particles from long-term single-particle observations at Zeppelin Observatory, Svalbard, Atmos. Chem. Phys., 22, 14421–14439, https://doi.org/10.5194/acp-22-14421-2022, 2022.
  • Adachi, K. , Oshima, N., Takegawa, N., Moteki, N., and Koike, M.: Meteoritic materials within sulfate aerosol particles in the troposphere are detected with transmission electron microscopy, Commun. Earth Environ., 3, 134, https://doi.org/10.1038/s43247-022-00469-8, 2022.
  • Adachi, K. , Dibb, J. E., Scheuer, E., Katich, J. M., Schwarz, J. P., Perring, A. E., Mediavilla, B., Guo, H., Campuzano-Jost, P., Jimenez, J. L., Crawford, J. H., Soja, A. J., Oshima, N., Kajino, M., Kinase, T., Kleinman, L., Sedlacek, A. J., Yokelson, R. J., and Buseck, P. R.: Fine ash-bearing particles as a major aerosol component in biomass burning smoke, J. Geophys. Res.-Atmos., 127, e2021JD035657, https://doi.org/10.1029/2021JD035657, 2022.
  • Adachi, K. , Oshima, N., Ohata, S., Yoshida, A., Moteki, N., and Koike, M.: Compositions and mixing states of aerosol particles by aircraft observations in the Arctic springtime, 2018, Atmos. Chem. Phys., 21, 3607–3626, https://doi.org/10.5194/acp-21-3607-2021, 2021.
  • Adachi, K. , Oshima, N., Gong, Z., de Sá, S. S., Bateman, A. P., Martin, S. T., de Brito, J. F., Artaxo, P., Cirino, G. G., Sedlacek III, A. J., and Buseck, P. R.: Mixing states of Amazon basin aerosol particles transported over long distances using transmission electron microscopy, Atmos. Chem. Phys., 20, 11923–11939, https://doi.org/10.5194/acp-20-11923-2020, 2020.
  • Adachi, K. , Sedlacek, A. J., Kleinman, L., Springston, S. R., Wang, J., Chand, D., Hubbe, J. M., Shilling, J. E., Onasch, T. B., Kinase, T., Sakata, K., Takahashi, Y., and Buseck, P. R.: Spherical tarball particles form through rapid chemical and physical changes of organic matter in biomass-burning smoke, Proc. Natl. Acad. Sci. U.S.A., 116, 19336–19341, https://doi.org/10.1073/pnas.1900129116, 2019.
  • Adachi, K. , Sedlacek, A. J., Kleinman, L., Chand, D., Hubbe, J. M., and Buseck, P. R.: Volume changes upon heating of aerosol particles from biomass burning using transmission electron microscopy, Aerosol Sci. Technol., 52, 46–56, https://doi.org/10.1080/02786826.2017.1373181, 2018.
  • Adachi, K. , Moteki, N., Kondo, Y., and Igarashi, Y.: Mixing states of light-absorbing particles measured using a transmission electron microscope and a single-particle soot photometer in Tokyo, Japan, J. Geophys. Res.-Atmos., 121, 9153–9164, https://doi.org/10.1002/2016JD025153, 2016.
  • Adachi, K. and Buseck, P. R.: Changes in shape and composition of sea-salt particles upon aging in an urban atmosphere, Atmos. Environ., 100, 1–9, https://doi.org/10.1016/j.atmosenv.2014.10.036, 2015.
  • Adachi, K. , Zaizen, Y., Kajino, M., and Igarashi, Y.: Mixing state of regionally transported soot particles and the coating effect on their size and shape at a mountain site in Japan, J. Geophys. Res.-Atmos., 119, 5386–5396, https://doi.org/10.1002/2013JD020880, 2014.
  • Adachi, K. , Kajino, M., Zaizen, Y., and Igarashi, Y.: Emission of spherical cesium-bearing particles from an early stage of the Fukushima nuclear accident, Sci. Rep., 3, 2554, https://doi.org/10.1038/srep02554, 2013.
  • Adachi, K. and Buseck, P. R.: Changes of ns-soot mixing states and shapes in an urban area during CalNex, J. Geophys. Res.-Atmos., 118, 3723–3730, https://doi.org/10.1002/jgrd.50321, 2013.
  • Adachi, K. , Freney, E., and Buseck, P. R.: Shapes of internally mixed hygroscopic aerosol particles after deliquescence, and their effect on light scattering, Geophys. Res. Lett., 38, L13804, https://doi.org/10.1029/2011GL047540, 2011.
  • Adachi, K. and Buseck, P. R.: Atmospheric tar balls from biomass burning in Mexico, J. Geophys. Res.-Atmos., 116, D05204, https://doi.org/10.1029/2010JD015102, 2011.
  • Adachi, K. , Chung, S. H., and Buseck, P. R.: Shapes of soot aerosol particles and implications for their effects on climate, J. Geophys. Res.-Atmos., 115, D15206, https://doi.org/10.1029/2009JD012868, 2010.
  • Adachi, K. and Buseck, P. R.: Hosted and free-floating metal-bearing atmospheric nanoparticles in Mexico City, Environ. Sci. Technol., 44, 2299–2304, https://doi.org/10.1021/es902505b, 2010.
  • Adachi, K. and Buseck, P. R.: Internally mixed soot, sulfates, and organic matter in aerosol particles from Mexico City, Atmos. Chem. Phys., 8, 6469–6481, https://doi.org/10.5194/acp-8-6469-2008, 2008.
  • Adachi, K., Chung, S. H., Friedrich, H., and Buseck, P. R.: Fractal parameters of individual soot particles determined using electron tomography: Implications for optical properties, J. Geophys. Res.-Atmos., 112, D14202, https://doi.org/10.1029/2006JD008296, 2007.
  • Adachi, K.: Characterization of atmospheric dry deposition particulates in Kobe, Japan, Chemosphere, 64, 1311–1317, https://doi.org/10.1016/j.chemosphere.2005.12.055, 2006.
  • Adachi, K. and Tainosho, Y.: Single particle characterization of size-fractionated road sediments, Appl. Geochem., 20, 849–859, https://doi.org/10.1016/j.apgeochem.2005.01.005, 2005.
  • Adachi, K. and Tainosho, Y.: Characterization of heavy metal particles embedded in tire dust, Environ. Int., 30, 1009–1017, https://doi.org/10.1016/j.envint.2004.04.004, 2004.
主な共著論文
  • Kinase, T., Taketani, F., Tobo, Y., Takigawa, M., Adachi, K., et al.: Contribution of bioaerosols from terrestrial ecosystems to ice-nucleating particles over the Arctic Ocean, npj Climate and Atmospheric Science, 9, 51, https://doi.org/10.1038/s41612-025-01291-7, 2026.
  • Tobo, Y., Adachi, K., Kawai, K., et al.: Surface warming in Svalbard may have led to increases in highly active ice-nucleating particles, Communications Earth & Environment, 5, 516, https://doi.org/10.1038/s43247-024-01677-0, 2024.
  • Beeler, P., Kumar, J., Schwarz, J. P., Adachi, K., et al.: Light absorption enhancement of black carbon in a pyrocumulonimbus cloud, Nature Communications, 15, 6243, https://doi.org/10.1038/s41467-024-50070-0, 2024.
  • Li, W., Riemer, N., Xu, L., Wang, Y., Adachi, K., et al.: Microphysical properties of atmospheric soot and organic particles: measurements, modeling, and impacts, npj Climate and Atmospheric Science, 7, 65, https://doi.org/10.1038/s41612-024-00610-8, 2024.
  • Freitas, P. G., Adachi, K., Conen, F., et al.: Regionally sourced bioaerosols drive high-temperature ice nucleating particles in the Arctic, Nature Communications, 14, 5997, https://doi.org/10.1038/s41467-023-41696-7, 2023.
  • Chakrabarty, R. K., Shetty, N. J., Thind, A. S., Beeler, P., Sumlin, B. J., Zhang, C., Liu, P., Idrobo, J. C., Adachi, K., Wagner, N. L., et al.: Shortwave absorption by wildfire smoke dominated by dark brown carbon, Nature Geoscience, https://doi.org/10.1038/s41561-023-01237-9, 2023.
  • Kinase, T., Adachi, K., Oshima, N., Goto-Azuma, K., Ogawa-Tsukagawa, Y., Kondo, Y., et al.: Concentrations and size distributions of black carbon in the surface snow of eastern Antarctica in 2011, J. Geophys. Res.-Atmos., 125, e2019JD030737, https://doi.org/10.1029/2019JD030737, 2020.
  • Ching, J., Adachi, K., Zaizen, Y., Igarashi, Y., and Kajino, M.: Aerosol mixing state revealed by transmission electron microscopy pertaining to cloud formation and human airway deposition, npj Clim. Atmos. Sci., 2, 10, https://doi.org/10.1038/s41612-019-0081-9, 2019.
  • Kurisu, M., Adachi, K., Sakata, K., and Takahashi, Y.: Stable isotope ratios of combustion iron produced by evaporation in a steel plant, ACS Earth Space Chem., 3, 1864–1871, https://doi.org/10.1021/acsearthspacechem.8b00171, 2019.
  • Tobo, Y., Adachi, K., DeMott, P. J., Hill, T. C. J., Hamilton, D. S., Mahowald, N. M., Nagatsuka, N., Ohata, S., Uetake, J., Kondo, Y., and Koike, M.: Glacially sourced dust as a potentially significant source of ice nucleating particles, Nat. Geosci., 12, 253–258, https://doi.org/10.1038/s41561-019-0314-x, 2019.
  • Sedlacek, A. J., Buseck, P. R., Adachi, K., Onasch, T. B., Springston, S. R., and Kleinman, L.: Formation and evolution of tar balls from northwestern US wildfires, Atmos. Chem. Phys., 18, 11289–11301, https://doi.org/10.5194/acp-18-11289-2018, 2018.
  • Yoshida, A., Ohata, S., Moteki, N., Adachi, K., Mori, T., Koike, M., and Takami, A.: Abundance and emission flux of the anthropogenic iron oxide aerosols from the East Asian continental outflow, J. Geophys. Res.-Atmos., 123, 11194–11209, https://doi.org/10.1029/2018JD028665, 2018.
  • Ohata, S., Yoshida, A., Moteki, N., Adachi, K., Takahashi, Y., Kurisu, M., and Koike, M.: Abundance of light-absorbing anthropogenic iron oxide aerosols in the urban atmosphere and their emission sources, J. Geophys. Res.-Atmos., 123, 8115–8134, https://doi.org/10.1029/2018JD028363, 2018.
  • Freney, E., Sellegri, K., Chrit, M., Adachi, K., Brito, J., Waked, A., Borbon, A., Colomb, A., Dupuy, R., Pichon, J.-M., Bouvier, L., Delon, C., Jambert, C., Durand, P., Bourianne, T., Gaimoz, C., Triquet, S., Feron, A., Beekmann, M., Dulac, F., and Sartelet, K.: Aerosol composition and the contribution of SOA formation over Mediterranean forests, Atmos. Chem. Phys., 18, 7041–7056, https://doi.org/10.5194/acp-18-7041-2018, 2018.
  • Moteki, N., Adachi, K., Ohata, S., Yoshida, A., Harigaya, T., Koike, M., and Kondo, Y.: Anthropogenic iron oxide aerosols enhance atmospheric heating, Nat. Commun., 8, 15329, https://doi.org/10.1038/ncomms15329, 2017.
  • Abe, Y., Iizawa, Y., Terada, Y., Adachi, K., Igarashi, Y., and Nakai, I.: Detection of uranium and chemical state analysis of individual radioactive microparticles emitted from the Fukushima nuclear accident using multiple synchrotron radiation X-ray analyses, Anal. Chem., 86, 8521–8525, https://doi.org/10.1021/ac501998d, 2014.
  • Yokelson, R. J., Burling, I. R., Urbanski, S. P., Atlas, E. L., Adachi, K., Buseck, P. R., Wiedinmyer, C., Akagi, S. K., Toohey, D. W., and Wold, C. E.: Trace gas and particle emissions from open biomass burning in Mexico, Atmos. Chem. Phys., 11, 6787–6808, https://doi.org/10.5194/acp-11-6787-2011, 2011.
  • Yokelson, R. J., Crounse, J. D., DeCarlo, P. F., Karl, T., Urbanski, S., Atlas, E., Campos, T., Shinozuka, Y., Kapustin, V., Clarke, A. D., Weinheimer, A., Knapp, D. J., Montzka, D. D., Holloway, J., Weibring, P., Flocke, F., Zheng, W., Toohey, D., Wennberg, P. O., Wiedinmyer, C., Mauldin, L., Fried, A., Richter, D., Walega, J., Jimenez, J. L., Adachi, K., Buseck, P. R., Hall, S. R., and Shetter, R.: Emissions from biomass burning in the Yucatan, Atmos. Chem. Phys., 9, 5785–5812, https://doi.org/10.5194/acp-9-5785-2009, 2009.
  • Buseck, P. R. and Adachi, K.: Nanoparticles in the atmosphere, Elements, 4, 389–394, https://doi.org/10.2113/GSELEMENTS.4.6.389, 2008.
  • Yokelson, R. J., Urbanski, S., Atlas, E., Toohey, D., Alvarado, E., Crounse, J., Wennberg, P., Fischer, M., Wold, C., Campos, T., Adachi, K., Buseck, P. R., and Hao, W. M.: Emissions from forest fires near Mexico City, Atmos. Chem. Phys., 7, 5569–5584, https://doi.org/10.5194/acp-7-5569-2007, 2007.
担当課題リスト 代表課題
  • 基盤研究(B)「複雑に混じりあう自然起源のエアロゾル粒子が氷晶核として雲形成に与える影響」（2023-2026年度）
  • 基盤研究(B)「森林火災から大量に生じる固体有機エアロゾルの発生・除去過程の解明と気候影響」（2019-2023年度）
  • 挑戦的研究（萌芽）「固体粒子のナノスケール構造・化学分析から挑む氷晶核メカニズムの解明」（2019-2023年度）
  • 若手研究(B)「気候に影響を与える光吸収性有機エアロゾルの個別粒子解析に関する研究」（2016-2019年度）
  • 若手研究(B)「ナノスケール特性の分析から挑む有機エアロゾルの地球気候への影響」（2013-2014年度）
分担課題等
  • 環境研究総合推進費: 急速な温暖化に伴う北極気候とエアロゾルの相互作用の解明 (2026-2028年度）
  • 環境研究総合推進費: 北極気候に関わるエアロゾルの長期的変化の把握と放射・気候影響評価（2023-2025年度）
  • 環境研究総合推進費: 大気中マイクロプラスチックの実態解明と健康影響評価（2021-2023年度）
  • 環境研究総合推進費: 地球温暖化に関わる北極エアロゾルの動態解明と放射影響評価（2020-2022年度）
  • 環境研究総合推進費: 地球温暖化に関わる北極ブラックカーボンとダスト粒子の動態と放射効果（2018-2020年度）
  • 環境研究総合推進費: 原子力事故データの総合解析による事故時の有害物質大気中動態評価法の高度化（2018-2020年度）
  • 環境研究総合推進費: PM2.5の成分組成、酸化能、呼吸器疾患ハザードとそのモデル予測に関する研究（2017-2019年度）
  • 地球環境保全等試験研究費: 光吸収性エアロゾルの監視と大気－雪氷系の放射収支への影響評価　－地球規模で進行する雪氷圏融解メカニズムの解明に向けて－（2017-2021年度）
  • 基盤研究（A）「北極域での気温上昇に伴う北極エアロゾルの変動および氷晶形成への影響評価」（2024年-2027年）
  • 基盤研究（B）「大気・海洋・雪氷中の鉱物ダスト粒子の粒径別数濃度の標準測定法の開発」（2023年-2025年）
  • 国際共同研究加速基金「 温暖なグリーンランド南部での自然起源エアロゾルに関する国際共同調査」（2023年-2026年）
  • 基盤研究（B）「北極圏における氷河起源ダストが氷晶核分布に与える影響の評価」（2019年-2021年）
  • 基盤研究（B）「環境水中のナノ・マイクロ粒子の実時間測定法の開発と応用」（2019年-2021年））
  • 基盤研究（A）「揮発性が異なる元素の気化に伴う同位体分別が拓く環境地球化学の新展開」（2018-2021年度）
  • 基盤研究（A）「近年のグリーンランド氷床表面の暗色化と急激な表面融解に関する研究」（2016-2019年度）
  • 基盤研究（B）「エアロゾル複合分析と個別粒子解析に基づくアジア低緯度域の粒子混合状態の解明」（2016-2018年度）
  • 基盤研究（B）「冬季の関東平野を巨大チャンバーに模した，CCN生成過程に関する研究」（2015-2019年度）
  • 宇宙航空研究開発機構（JAXA）地球環境変動観測ミッション（GCOM）研究「改良粒子散乱モデルを用いた氷雲・エアロゾル解析手法の開発」（2016-2018年度）
  • C3 地球環境監視・診断・予測技術高度化に関する研究（2014-2018年度）
  • 放射能調査研究費: 人工放射性核種のバックグラウンド大気監視と数値解析に関する研究（2015-2023年度）