Global COE Program - Kyoto University - In Search of Sustainable Humanosphere in Asia and Africa: ADACHI, Toru

Research Theme：　

Development of VLF observation network for the monitoring of lightning activity
Ground- and satellite-based measurements of the electrical coupling between the troposphere and ionosphere
A study on the ionospheric structure by means of the airglow measurements

References：　

Adachi, T., H. Fukunishi, Y. Takahashi, M. Sato, A. Ohokubo, and K. Yamamoto, Characteristics of thunderstorm systems producing winter sprites in Japan, J. Geophys. Res., 110, doi:10.1029/2004JD005012, 2005.
Adachi, T., H. Fukunishi, Y. Takahashi, Y. Hiraki, R. –R. Hsu, H. T. Su, A. B. Chen, S. B. Mende, H. U. Frey, and L. C. Lee, Electric field transition between the diffuse and streamer regions of sprites estimated from ISUAL/array photometer measurements, Geophys. Res. Lett., 33, doi:10.1029/2006GL026495, 2006.

2007 G-COE Research Outcome

Electrical coupling between troposphere and ionosphere by lightning and sprites, Adachi, T., MTI Handbook, 1-A, 2007.
Frey, H. U., S. B. Mende, S. A. Cummer, J. Li, T. Adachi, H. Fukunishi, Y. Takahashi, A. B. Chen, R.-R. Hsu, H.-T. Su, and Y. S. Chang, Halos, generated by negative cloud-to-ground lightning,Geophys. Res. Lett., 34, L18801,doi:10.1029/2007GL030908, 2007.
Enell, C.-F., E. Arnone, T. Adachi, O. Chanrion, P. T. Verronen, A. Seppala, T. Neubert, T. Ulich, E. Trunen, and R.-R. Hsu, Parameterisation of the chemical effect of sprites in the middle atmosphere, Ann. Geophys., 26, 13-27, 2008.

List of Academic Presentations during 2007:

T. Adachi,　Electrodynamical processes in sprites derived from FORMOSAT-2/ISUAL measurements, Adachi, T., H. Fukunishi, Y. Takahashi, R.-R. Hsu, H.-T. Su, A. B. Chen, S. B. Mende, H. U. Frey, and L.-C. Lee, Japan Geoscinece Union 2007 Conference, Chiba, Makuhari、2007.
T. Adachi,　Vertical and horizontal structures of 630-nm airglow observed with FORMOSAT-2/ISUAL, Adachi, T., M. Yamamoto, Y. Takahashi, A. B. Chen, H.-T. Su, R.-R. Hsu, H. U. Frey, and S. B. Mende, The 122th Society of Geomagnetism and Earth, Planetary and Space Sciences 、Aichi、Nagoya、2007.
T. Adachi,　New results of SPRITE by ISUAL/FORMOSAT-2 – Estimation of electric fields in sprites -, Adachi, T., H. Fukunishi, Y. Takahashi, Y. Hiraki, R.-R. Hsu, H.-T. Su, A. B. Chen, S. B. Mende, H. U. Frey, and L.-C. Lee, 2007 ITT meeting, Nara、Nara、2007

2008 G-COE Research Outcome:

Parameterisation of the chemical effect of sprites in the middle atmosphere, Annales Geophysicae, Enell, C.-F., E. Arnone, T. Adachi, O. Chanrion, P. T. Verronen, A. Seppala, T. Neubert, T. Ulich, E. Turunen, Y. Takahashi, and R.-R. Hsu, 26, 13-27, 2008.
Electric fields and electron energies in sprites and temporal evolutions of lightning charge moment, Adachi, T., Y. Hiraki, K. Yamamoto, Y. Takahashi, H. Fukunishi, R.-R. Hsu, H.-T. Su, A. B. Chen, S. B. Mende, H. U. Frey, and L.-C. Lee, Journal of Physics D: Applied Physics, 41, doi:10.1088/0022- 2727/41/234010, 2008.
Global distribution of intense lightning discharges and their seasonal variations, Sato, M., Y. Takahashi, A. Yoshida, and T. Adachi, Journal of Physics D: Applied Physics, 41, doi:10.1088/0022-3727/41/23/234011, 2008.
Monitoring of Lightning Activity in Southeast Asia: Scientific Objectives and Strategies, Adachi, T., Y. Takahashi, H. Ohya, F. Tsuchiya, K. Yamashita, M. Yamamoto, H. Hashiguchi, Kyoto Working Papers on Area Studies, submitted, 2009.

List of Academic Presentations during 2008:

T. Adachi,Transient Luminous Events as Lightning Effects in the Lower Ionosphere: Recent Progresses by ISUAL Measurements on FORMOSAT-2 satellite, T. Adachi, Y. Takahashi, R.-R. Hsu, H.-T. Su, A. B. Chen, S. B. Mende, and H. U. Frey, International Symposium on Equatorial Atmosphere-12, Crete, Greece, 2008.
T. Adachi,Implications of lightning processes for initiations of sprites and halos derived from ISUAL measurements, Adachi, T., Y. Takahashi, A. B. Chen, R.-R. Hsu, H.-T. Su, H. U. Frey, and S. B. Mende, Japan Geoscinece Union 2007 Conference, Chiba, Makuhari、2008.
T. Adachi,VLF observation network in the Southeast Asia, Adachi, T., H. Ohya, F. Tsuchiya, and Y. Takahashi, Working Group Meeting for the Sprite Study, Chiba、Makuhari、2008.
T. Adachi,Altitude-latitude distribution of 630-nm airglow observed with the FORMOSAT-2/ISUAL: A comparison with plasma density measurements, Adachi, T., M. Yamaoka, M. Yamamoto, Y. Otsuka, H. Liu, S. Watanabe, C.-C. Hsiao, A. B. Chen, R.-R. Hsu, The 122th Society of Geomagnetism and Earth, Planetary and Space Sciences、Miyagi、Sendai、2008.
T. Adachi,Multi-spectral measurements of sprites with FORMOSAT-2/ISUAL: consistency and inconsistency with theories, Adachi, T., H. Frey, Y. Takahashi, A. B. Chen, R.-R. Hsu, H.-T. Su, and S. B. Mende, The 124th Society of Geomagnetism and Earth, Planetary and Space Sciences、Miyagi、Sendai、2008.
T. Adachi,Correlated optical and radio signatures in sprite-producing lightning, Adachi, T., S. Cummer, J. Li, Y. Takahashi, R.-R. Hsu, H.-T. Su, A. B. Chen, S. B. Mende, and H. U. Frey, 2008 AGU fall meeting, San Francisco, California, USA, 2008.
T. Adachi,Multi-spectral Measurements of TLEs & Lightning with FORMOSAT-2/ISUAL, Adachi, T., ONR Lightning-Ionosphere Workshop, Stanford, California, USA, 2009.

2009 G-COE Research Outcome:

Adachi, T., S. Cummer, J. Li, Y. Takahashi, R.-R. Hsu, H.-T. Su, A. B. Chen, S. B. Mende, and H. U. Frey (2009), Estimating lightning current moment waveforms from satellite optical measurements, Geophys. Res. Lett., 36, L18808, doi:10.1029/2009GL039911.
Takahashi, Y., A. Yoshida , M. Sato , T. Adachi , S. Kondo , R.-R. Hsu , H.-T. Su , A. B. Chen , S. Mende , H. Frey , and L.-C. Lee (2010), Absolute optical energy of sprites and its relationship to charge moment of parent lightning discharge based on measurement by ISUAL/AP, J. Geophys. Res., accepted and in print.
Adachi, T., M. Yamaoka, M. Yamamoto, Y. Otsuka, H. Liu, C.-C. Hsiao, A. B. Chen, and R.-R. Hsu (2010), Midnight latitude-altitude distribution of 630-nm airglow in the Asian sector measured with FORMOSAT-2/ ISUAL, J. Geophys. Res., in press.

List of Academic Presentations during 2009:

Adachi, T., M. Yamamoto, U. Inan, Y. Otsuka, and Y. Takahashi, Possible VHF radar echoes in the lower ionosphere associated with lightning discharges – Preliminary results -, American Geophysical Union Chapman Conference on Effects of Thunderstorms and Lightning in the Upper Atmosphere, EV-01, University Park, PA, USA, 12 May 2009.
Adachi, T., S. Cummer, J. Li, N. Lehtinen, Y. Takahashi, R. Hsu, H. Su, A. Chen, S. B. Mende, H. U. Frey (2009), Current moment waveforms in sprite/halo producing lightning derived from satellite optical measurements, American Geophysical Union 2009 Fall Meeting, San Francisco, CA, USA, 16 December 2008.