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Toshihiko Takemura Last modified date:2021.04.24

Graduate School

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Academic Degree
Doctor of Science
Country of degree conferring institution (Overseas)
Field of Specialization
Meteorology, Atmospheric Environment
Total Priod of education and research career in the foreign country
Outline Activities
Development of three-dimensional global aerosol transport model SPRINTARS, and anaysis of climate response to the aerosol-radiation interaction and aerosol-cloud interaction. Estimation of the radiative forcing for anthropogenic aerosols, and projection of cliamte change cooperating with the University of Tokyo, National Institute for Environmental Studies, and JAMSTEC. Operation of a weekly aerosol forecasting system every day. Highly Cited Researcher.
Research Interests
  • Estimation of aerosol effects on climate
    keyword : aerosol, atmospheric radiation, radiative forcing, general circulation model, cloud-aerosol interaction, climate change projection
    1997.04Development of three-dimensional global aerosol transport model, and anaysis of climate response to the aerosol direct and indirect effects. Estimation of the radiative forcing for anthropogenic aerosols, and prediction of cliamte change cooperating with the University of Tokyo and the National Institute for Environmental Studies..
Academic Activities
1. Takemura, T., Return to different climate states by reducing sulphate aerosols under future CO2 concentrations, Scientific Reports, 10.1038/s41598-020-78805-1, 10, 1, 2020.12, 大気海洋結合のMIROC-SPRINTARSを用いて、主要な人為起源短寿命気候強制因子(SLCFs)である硫酸塩エアロゾルの前駆気体であるSO2について、燃料消費起源の排出量を全球一様の比率で数段階に増減させる感度実験を行った。その際のCO2濃度を、2000年レベルおよびその2倍の2つのパターンに設定した。その結果、近い将来に想定される硫酸塩エアロゾル濃度の低下に伴う気温上昇は、同量の硫酸塩エアロゾル濃度の低下であっても、CO2濃度が高い状態の方が大きくなることを定量的に示した。その傾向は北半球中・高緯度で強く、水蒸気フィードバックおよび雪氷アルベドフィードバックが寄与していることを示した。このことは、大気汚染対策を実施する場合、同時に温室効果ガス濃度の上昇を抑制しなければ、地球温暖化が加速度的に進行することを示している。.
2. Takemura, T. and K. Suzuki, Weak global warming mitigation by reducing black carbon emissions, Scientific Reports, 10.1038/s41598-019-41181-6, 9, 4419, 2019.03, [URL].
3. Takemura, T., Distributions and climate effects of atmospheric aerosols from the preindustrial era to 2100 along Representative Concentration Pathways (RCPs) simulated using the global aerosol model SPRINTARS, Atmospheric Chemistry and Physics, 10.5194/acp-12-11555-2012, 12, 23, 11555-11572, 2012.12, [URL].
4. Takemura, T., and T. Uchida, Global climate modeling of regional changes in cloud, precipitation, and radiation budget due to the aerosol semi-direct effect of black carbon, SOLA, 10.2151/sola.2011-046, 7, 181-184, 2011.11, [URL].
5. Takemura, T., H. Nakamura, and T. Nakajima, Tracing airborne particles after Japan's nuclear plant explosion, EOS (Transactions, American Geophysical Union), 10.1029/2011EO450002, 92, 397-398, 2011.11, [URL], 東北地方太平洋沖地震による津波で被災した福島第1原子力発電所から放出された放射性物質が、北米および欧州へ飛散した様子を、大気微粒子の広域輸送モデルを用いたコンピュータシミュレーションにより、観測のタイミング通りに再現することに成功した。.
6. Takemura, T., H. Nakamura, M. Takigawa, H. Kondo, T. Satomura, T. Miyasaka, and T. Nakajima, A numerical simulation of global transport of atmospheric particles emitted from the Fukushima Daiichi Nuclear Power Plant, SOLA, 10.2151/sola.2011-026, 7, 101-104, 2011.07, [URL].
7. Takemura, T., 2009: Review and future studies of estimating aerosol effects on climate system. Earozoru Kenkyu, 24, 237-241.
8. Takemura, T., 2009: Development of Forecasting System for Atmospheric Aerosols, Tenki, 56, 455-461.
9. Takemura, T., M. Egashira, K. Matsuzawa, H. Ichijo, R. O'ishi, and A. Abe-Ouchi, A simulation of the global distribution and radiative forcing of soil dust aerosols at the Last Glacial Maximum, Atmospheric Chemistry and Physics, 10.5194/acp-9-3061-2009, 9, 3061-3073, 2009.05, [URL].
10. Takemura, T., Y. J. Kaufman, L. A. Remer, and T. Nakajima, Two competing pathways of aerosol effects on cloud and precipitation formation, Geophysical Research Letters, 10.1029/2006GL028349, 34, 4, L04802, 2007.02, [URL].
11. Takemura, T., Y. Tsushima, T. Yokohata, T. Nozawa, T. Nagashima, and T. Nakajima, Time evolutions of various radiative forcings for the past 150 years estimated by a general circulation model, Geophysical Research Letters, 10.1029/2006GL026666, 33, 19, L19705, 2006.10, [URL].
12. Takemura, T., T. Nozawa, S. Emori, T. Y. Nakajima, and T. Nakajima, Simulation of climate response to aerosol direct and indirect effects with aerosol transport-radiation model, Journal of Geophysical Research-Atmospheres, 10.1029/2004JD005029, 110, D2, 2005.01, [URL].
13. Takemura, T., T. Nakajima, A. Higurashi, S. Ohta, and N. Sugimoto, Aerosol distributions and radiative forcing over the Asian-Pacific region simulated by Spectral Radiation-Transport Model for Aerosol Species (SPRINTARS), Journal of Geophysical Research-Atmospheres, 10.1029/2002JD003210, 108, D23, 8659, 2003.08, [URL].
14. Takemura, T., 2003: A study of aerosol distribution and radiative forcing with a global three-dimensional aerosol transport-radiation model, Tenki, 50, 425-435.
15. Takemura, T., I. Uno, T. Nakajima, A. Higurashi, and I. Sano, Modeling study of long-range transport of Asian dust and anthropogenic aerosols from East Asia, Geophysical Research Letters, 10.1029/2002GL016251, 29, 24, 2002.12, [URL].
16. Takemura, T., T. Nakajima, O. Dubovik, B. N. Holben, and S. Kinne, Single-scattering albedo and radiative forcing of various aerosol species with a global three-dimensional model, Journal of Climate, 15, 333-352, 2002.02, [URL].
17. Takemura, T., T. Nakajima, T. Nozawa, and K. Aoki, Simulation of future aerosol distribution, radiative forcing, and long-range transport in east Asia, Journal of the Meteorological Society of Japan, 10.2151/jmsj.79.1139, 79, 1139-1155, 2001.12, [URL].
18. Takemura, T., H. Okamoto, Y. Maruyama, A. Numaguti, A. Higurashi, and T. Nakajima, Global three-dimensional simulation of aerosol optical thickness distribution of various origins, Journal of Geophysical Research-Atmospheres, 10.1029/2000JD900265, 105, D14, 17853-17873, 2000.07, [URL].
Works, Software and Database
2. To research effects of aerosols on the climate system and to simulate condition of air pollution, the SPRINTARS (Spectral Radiation-Transport Model for Aerosol Species) has been developed. The SPRINTARS is a global three-dimensional aerosol transport-radiation model coupled with the CCSR (Center for Climate System Research, University of Tokyo)/NIES (National Institute for Environmental Studies, Japan)/FRCGC (Frontier Research Center for Global Change) AGCM (Atmospheric General Circulation Model). he treated aerosol species and their precursors are main tropospheric aerosols and related gases. The aerosol transport processes include emission, advection, diffusion, and deposition (sub-cloud scavenging, in-cloud scavenging, dry deposition, and gravitational settling). The model can treat nudging of the meteorological parameters of wind, temperature, and specific humidity with reanalysis data. The radiative process is calculated considering refractive indices depending on wavelengths, size distributions, and hygroscopic growth of each aerosol species. Changes in cloud droplet size (1st indirect effect) and precipitation (2nd indirect effect) are included in the model. SPRINTARS is also able to simulate climate change due to aerosols with feedback mechanisms by coupled with the ocean or mixed layer ocean model.
Membership in Academic Society
  • European Geosciences Union
  • Meteorological Society of Japan
  • American Geophysical Union
  • Japan Association of Aerosol Science and Technology
  • Japan Geoscience Union
  • Awards for Science and Technology (Research Category) of the Commendation for Science and Technology (Minister of Education, Culture, Sports, Science and Technology of Japan)
  • Nishida Prize for Promotion of Geoscience: Development of global aerosol model and study on effects of aerosols on climate change.
  • Societry Award of Meteorological Society of Japan: Modeling research on climate effects of aerosols.
  • Asian Young Aerosol Scientist Award (Asian Aerosol Research Assembly)
  • Prize for encouragement (Japan Association of Aerosol Science and Technology)
  • The Young Scientists' Prize of the Commendation for Science and Technology (Minister of Education, Culture, Sports, Science and Technology of Japan)
  • Young Scientist Award (International Radiation Commission)
  • Yamamoto-Syono Award for Outstanding Papers (Meteorological Society of Japan)
Educational Activities
Climate Change Science Section, Major of Earth System Science and Technology, Interdisciplinary Graduate School of Engineering Sciences.
Professional and Outreach Activities
2002~ Visiting Researcher at National Institute for Environmental Studies
2003~2007 Collaborating Researcher at Research Institute for Humanity and Nature.