Kyushu University Academic Staff Educational and Research Activities Database
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Yoshikawa Akimasa Last modified date:2017.04.07

Associate Professor / Earth Planetary Fluid and Space Sciences
Department of Earth and Planetary Sciences
Faculty of Sciences


Graduate School
Undergraduate School
Other Organization


E-Mail
Homepage
http://www.science.scc.kyushu-u.ac.jp/index.html
Phone
092-642-2672
Fax
092-642-2685
Academic Degree
Doctor of Sciences
Field of Specialization
Solar Terrestrial Physics
Research
Research Interests
  • Studies on formation of Cowling channel connecting from polar to equatorial ionosphere
    keyword : Composite system, mathematical sciences
    2012.04~2017.05.
  • Mathematical science for composite system
    keyword : Composite system, mathematical sciences
    2010.03~2014.05.
  • Studies on the 3D-Cowling effect
    keyword : 3D-current system, Hall current divergence, Sq, auroral electrojet
    2007.05~2010.04.
  • Studies on the generation mechanism of substorm process by using global MI-coupling simulation
    keyword : magnetosphere-ionosphere coupling, substorm, simulation, mathematical science
    2008.05~2013.04.
  • Development of Magnetospheric Storm simulator
    keyword : magnetospheric storm, global simulation, multi-sphere coupling
    2005.03~2007.03.
  • Understanding of the 3D-current system in the geospace
    keyword : geospace, space weather, 3D-current system, global, CPMN, MAGDAS
    2002.04~2010.03.
  • Complex physics in the solar terrestrial system
    keyword : complex system, inter hierarchical coupling, magnetosphere-ionosphere coupling
    2000.04~2011.03.
  • Comparative study of geo-electromagnetic fields using FM-CW radar and MAGDS/CPMN data
    keyword : HF-doppler, ionospheric electric field, ionospheric current system, ionospheric physics
    2000.04~2010.03.
  • magnetospheric physics in the multi-species ion and electron plasma system
    keyword : herman magnetosphere, Jupiter magnetosphere, magnetosphere coupling, space reserch
    2002.04~2011.03.
  • Interaction between MHD waves and ionosphere
    keyword : Hall effect, magnetosphere-ionosphere coupling, energy balance, field-aligned current, inductive coupling
    2000.04~2011.03.
Academic Activities
Books
1. Lysak, R. L. and A. Yoshikawa, Resonant Cavities and Waveguides in the Ionosphere and Atmosphere, Magnetospheric ULF Waves: Synthesis and New Directions, AGU, Washington, D. C., Geophys. Monogr. Ser., vol. 169., edited by K. Takahashi, P. J. Chi, R. E. Denton, and R. L. Lysak, pp. 289-306, 2006.12.
Papers
1. M.G. Cardina, Akimasa Yoshikawa, Hideaki Kawano, Huixin Liu, Masakazu Watanabe, Shuji Abe, Teiji Uozumi, George Maeda, Tohru Hada, Kiyohumi Yumoto, Capacity Building: A Tool for Advancing Space Weather Science, Space Weather, 12, 571–576, doi:10.1002/2014SW001110, 12, 10, 571-576, 2014.10.
2. Akimasa Yoshikawa, MAGDAS Capacity Building Activities for Space Weather Research at ICSWSE, Research Note, Space Research Today, Volume 188, December 2013, Pages 18-20, ISSN 1752-9298, http://dx.doi.org/10.1016/j.srt.2013.11.007. , 188, 10, 6405-6415, 2013.11.
3. Akimasa Yoshikawa, Amm, O, Vanhamaki, H, Fujii, R., Illustration of Cowling channel coupling to the shear Alfven wave, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 118, 10, 6405-6415, 2013.10.
4. Akimasa Yoshikawa, Amm, O, Vanhamaki, H, Nakamizo, A, Fujii, R., Theory of Cowling channel formation by reflection of shear Alfven waves from the auroral ionosphere, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 118, 10, 6416-6425, 2013.10.
5. Shi, Run, Huixin Liu, Yoshikawa A, Zhang, Beichen, Ni, Binbin, Coupling of electrons and inertial Alfven waves in the topside ionosphere, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 118, 6, 2903-2910, 2013.06.
6. Amm, O, Fujii, R, Vanhamaki, H, Yoshikawa A, Ieda, A, General solution for calculating polarization electric fields in the auroral ionosphere and application examples, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 118, 5, 2428-2437, 2013.05.
7. Fujii, R, Amm, O, Akimasa Yoshikawa, Vanhamakki, H, An application of the finite length Cowling channel model to auroral arcs with longitudinal variations, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 117, 2012.11.
8. Vanhamakki, H, Akimasa Yoshikawa, Amm, O, Fujii, R, Ionospheric Joule heating and Poynting flux in quasi-static approximation, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 117, 2012.08.
9. Akimasa Yoshikawa, Olaf Amm, Heikki Vanhamakki, Ryoichi Fujii, A self-consistent synthesis description of magnetosphere-ionosphere coupling and scale−dependent auroral process using shear Alfvén wave, J. Geophys. Res, J. Geophys. Res., 116, A08218, doi:10.1029/2011JA016460, 2011.06.
10. Yoshikawa A., A. Nakamizo, O. Amm, H. Vanhamaki, T. Uozumi, Y._I. Tanaka, R. Fujii, K. Yumoto and S. Ohtani, Self-consistent formulation for the evolution of ionospheric conductances at the ionospheric E-region within the M-I coupling scheme, Journal of Geophysical Research - Space Physics, J. Geophys. Res, 22011JA016449 (accepted), 2011.06.
11. Fujii, R., O. Amm, A. Yoshikawa, A. Ieda, and H. Vanjamakki, Reformulation and energy flow of the Cowling channel, J. Geophys. Res, 116, A02305, J. Geophys. Res, 116, A02305, doi:10.1029/2010JA015989., 2011.01.
12. Amm O., R. Fujii, K. Kauristie, A. Aikio, A. Yoshikawa, A. Ieda, H. Vanhamaki, A statistical investigation of the Cowling channel efficiency in the auroral zone, J. Geophys. Res, 116, A02304, doi:10.1029/2010JA015988, 116, A02304, J. Geophys. Res, 116, A02304, doi:10.1029/2010JA015988, 2011.01.
13. Tanaka T., A. Nakamizo, A. Yoshikawa , S. Fujita, H. Shinagawa, H. Shimazu, T. Kikuchi, K. Hashimoto, Substorm convection and current system deduced from the global simulation, J. Geophys. Res., 115, A05220, J. Geophys. Res. 115, A05220, doi:10.1029/2009JA014676, 2010.12.
14. Yoshikawa A., H. Nakata, A. Nakamizo, T. Uozumi, M. Itonaga, S. Fujita, K. Yumoto, and T. Tanaka, Alfvenic-coupling algorithm for global and dynamical magnetosphere-ionosphere coupled system, J. Geophys. Res., 115, A04211, J. Geophys. Res., 115, A04211, doi:10.1029/2009JA014924, 2010.03.
15. Yoshikwa A., H. Nakata, A. Nakamizo, T. Uozumi, M. Itonaga, and K. Yumoto, A new magnetospherere- ionosphere coupling scheme for temporal and global magnetospheric MHD simulations, Mem. Fac. Sci., Kyushu Univ., Ser. D, Earth & Planet.Sci.,Vol, XXXII, No2, 87-94, XXXII, 2, 87-94, Vol, XXXII, No2, 87-94, 2009.03.
16. O. Amm, A. Aruliah, S.C. Buchert, R. Fujii, J.M. Gjerloev, A. Ieda, T. Matsuo, C. Stolle, H. Vanhamaki, and A. Yoshikawa,, Understanding the electrodynamics of the 3-dimensional high-latitude ionosphere: present and future,, Annales Geophysicae, AG/2008057, 26, 3912-3913., 2008.12.
17. Tokunaga, T., H. Kohta, A. Yoshikawa, T. Uozumi, and K. Yumoto, Global features of Pi 2 pulsations obtained by Independent Component Analysis, Geophys. Res. Lett., Vol.34,L14106, doi:10.1029/2007GL030174, 2007.05.
18. Lysak, R. L. and A. Yoshikawa, Resonant Cavities and Waveguides in the Ionosphere and Atmosphere, Magnetospheric ULF Waves: Synthesis and New Directions, Geophys. Monogr. Ser., vol. 169., edited by K. Takahashi, P. J. Chi, R. E. Denton, and R. L. Lysak, pp. 289-306, AGU, Washington, D. C., 2006.08.
19. Obana Y, A. Yoshikawa, Olson JV, and K. Yumoto, North-south asymmetry of the amplitude of high-latitude Pc 3-5 pulsations: Observations at conjugate stations , J. Geophys Res., 110 (A10): Art. No. A10214 OCT 28 2005, 110, A10, J. Geophys Res., 110 (A10): Art. No. A10214 OCT 28 2005, 2005.10.
20. Obana, A. Yoshikawa, J.V. Olson, R.J. Morris, B.J. Fraser, S.I. Solovyev, and K. Yumoto, Techniques to investigate the ionospheric effect on ULF waves, Proceeding of The fifth Workshop on Applications of Radio Science (WARS) obart Australia, on Feb. 18-20, 2004, CD-ROM, H12, 2004.02.
21. Takasaki S., H. Kawano, Y. Tanaka, A. Yoshikawa, M. Seto, M. Iizima, and K. Yumoto, Plasma Distribution in the Low-L part of the Plasma sphere during Magnetic Storms, International Symposium on Information Science and Electrical Engineering 2003, Nov.13-14, 2003, ACROS Fukuoka, Fukuoka, Japan, 253-255, 2003.11.
22. Yoshikawa A. , H. Kohta, M.I tonaga, T. Uozumi, K. Yumoto, Inegrated Analysis of Coordinated Ground Magnetic Field Data for Space Weather Study, International Symposium on Information Science and Electrical Engineering 2003, Nov.13-14, 2003, ACROS Fukuoka, Fukuoka, Japan, 114-117, 2003.11.
23. Obana Y., A. Yoshikawa, J.V. Olson, R.J. Morris, B.J. Fraser, S.I. Solovyev and K. Yumoto, Environment Factors of PC 4 Amplitudes Observed at the CPMN Stations, International Symposium on Information Science and Electrical Engineering 2003, Nov.13-14, 2003, ACROS Fukuoka, Fukuoka, Japan, 256-258, 2003.11.
24. Abe S., K. Yumoto, H. Kawano, A. Yoshikawa, Y. Obana, S. I. Solovyev, D.G. Baishev, J.V. Olson, E.W. Worthington, and the Circum-pan Pacific Magnetometer Network Group, The Diagnosis of the Plasmapause by Ground Magnetometer Network Observation at Multiple Local Times, International Symposium on Information Science and Electrical Engineering 2003, Nov.13-14, 2003, ACROS Fukuoka, Fukuoka, Japan, 534-536, 2003.11.
25. Yoshikawa, A., K. Yumoto, M. Shinohara, and M. Itonaga, Diagrammatic method to describe the self-inductive response of magnetosphere-ionosphere-atmosphere-Earth electromagnetically coupled system as a quasi-particle excitation, Journal of Geophysical Research, 107, A5, vo.107, No. A5, SMP 3, 1-9, 2002.01.
26. Yoshikawa, A. , Y. Obana, M. Shinohara, M. Itonaga, and k. Yumoto, Hall-induced inductive shielding effect on geomagnetic pulsation, Geophysical Research Letters, 29, 8, Vol.29, No.8, 107, 2002.01.
27. Yoshikawa, A., How does the rotational Hall current absorb increasing energy from the field-aligned current system?, Geophysical Research Letters, Vol.29, No.7, 10.1029/ 2001GL014125, 2002.01.
28. Yoshikawa, A., Excitation of a Hall-current generator by field-aligned-current closure, via an ionospheric, divergent Hall current, during the transient phase of magnetosphere?ionosphere coupling, Journal of Geophysical Research, 107, A12, Vol.107, No.A12, 1445, doi: 10.1029/2001JA009170, 2002.01.
29. M. Itonaga, A. Yoshikawa, K. Yumoto, S. Fujita and H. Nakata, A study on the generation of field-aligned current in the magnetosphere, Mem. Fac. Sci., Kyushu Univ., Ser. D, Earth and Planet. Sci., Vol, XXXI, No1, 1-9, 2000.01.
30. Itonaga, M., A. Yoshikawa and S. Fujita, A wave equation describing the generation of field-aligned current in the Magnetosphere, Earth Planets Space, 52, 7, vol.52, 503-507, 2000.01.
31. Yoshikawa, A., and M. Itonaga, The nature of reflection and mode conversion of MHD waves at the inductive ionosphere: Multistep mode conversion between divergent and rotational electric fields, Journal of Geophysical Research, 105, A5, VOL.105, No.A5, 10565-10584, 2000.01.
32. Yoshikawa, A., and M. Itonaga, Reflection of shear Alfven waves at the ionosphere and the divergent Hall current, Geophysical Research Letters, 23, 1, Vol.23, No.1, 101-104, 1996.01.
33. Itonaga, M., T.-I.Kitamura and A. Yoshikawa, Interaction between hydromagnetic waves and the anisotropically conducting ionosphere, Journal of Geomagnetism and Geoelectricity, 47, 5, Vol.47, No.5, 459-474, 1995, 1995.01.
34. Yoshikawa, A., M. Itonaga and T.-I.Kitamura, Effect of the ionospheric induction current on magnetohydrodynamic waves in the magnetosphere, Proceedings of the NIPR Symposium on Upper Atmosphere Physics, Vol.17, No.8, 49-59, 1995, 1995.01.
35. Yoshikawa, A., M. Itonaga and T.-I.Kitamura, On the coupled effect between the field aligned and ionospheric current, Proceeding of Eight International Symposium on Solar Terrestrial Physics, June 5-10, 1994, Sendai, Japan, 155-159, 1994.06.
36. Itonaga, M., and A. Yoshikawa, Discrete spectral structure of low latitude and equatorial Pi2 pulsations, , Journal of Geomagnetism and Geoelectricity, Vol.44, No.3, 253-259, 44, 3, 253-259, 1992.01.
Works, Software and Database
1. .
Presentations
1. Estelle, Dirand, Akimasa Yoshikawa, Computer simulation on formation of ionospheric current system accompanied by the incidence of shear Alfvén waves to the ionosphere, United Nations/Japan for Space Weather Symposium, 2015.03.05.
2. Akimasa Yoshikawa, ICSWSE/MAGDAS project, United Nations/Japan for Space Weather Symposium, 2015.03.02.
3. Kiyohumi Yumoto, Akimasa Yoshikawa, Hideaki Kawano, S. Abe, T. Uozumi, M. Grace, G. Maeda, Recent developments from ICSWSE/MAGDAS Research Project, AGU fall meeting, 2014.12.18.
4. Akimasa Yoshikawa, Hideaki Kawano, S. Abe, T. Uozumi, M. Grace, G. Maeda, ICSWSE MAGDAS project, National school on Space and Earth Electromagnetism(SEE) 2014, 2014.12.02.
5. Akimasa Yoshikawa, Hideaki Kawano, Shuji Abe, T. Uozumi, M. Grace, G. Maeda, Space Science Capacity Building at International Center for Space Weather Science and Education (ICSWSE), United Nations / Austria Symposium on “Space Science and the United Nations”, 2014.09.23.
6. 吉川 顕正, Magnetosphere-Ionosphere Coupling through Alfven Wave, SCOSTEP/ISWI International Space Science School (ISSS) in Peru, SCOSTEP/ISWI International Space Science School (ISSS) in Peru, 2014.09.19.
7. 吉川 顕正, Technical Presentation on the International Center for Space Weather Science and Education (ICSWSE) of Kyushu University, Geomagnetic Workshop in Medan (North Sumatra, Indonesia), 2014.09.07.
8. 吉川 顕正, Theory of Cowling channel formation by reflection of shear Alfven waves from the auroral Ionosphere, AGU Chapman Conference on Low-Frequency Waves in Space Plasmas, 2014.08.31.
9. Akimasa Yoshikawa, Technical presentation on the “International Center for Space Wather Science and Education”, Kyushu University, 第52回国連宇宙平和利用委員会, 2014.02.13.
10. G. Maeda, Akimasa Yoshikawa, S. Abe, Progress of the MAGDAS Project During 2013, AGU General Assembly 2013, 2013.12.11.
11. Akimasa Yoshikawa, On formation of Global Cowling channel in the ionosphere and the generalized Ohm’s Law, AGU General Assembly 2013, 2013.12.11.
12. A. Nakamizo, Akimasa Yoshikawa, Shinichi Ohtani, Akimasa Ieda, Kanako Seki, Rotation of the ionospheric electric potential caused by spatial gradients of ionospheric conductivity, AGU General Assembly 2013, 2013.12.11.
13. S. Abe, Akimasa Yoshikawa, Hideaki Kawano, T. Uozumi, A. Ikeda, Cardinal, M.G, G. Maeda, Kiyohumi Yumoto, Rebuild of data distribution service for MAGDAS/CPMN project
, SCOSTEP, International CAWSES-II meeting, SCOSTEP, International CAWSES-II meeting, 2013.11.20.
14. G. Maeda, Kiyohumi Yumoto, Hideaki Kawano, Akimasa Yoshikawa, Huixin Liu, Masakazu Watanabe, S. Abe, T. Uozumi, A. Ikeda, Cardinal, M.G, MAGDAS activities of year 2013, SCOSTEP, International CAWSES-II meeting, 2013.11.20.
15. Cardinal, M.G, Akimasa Yoshikawa, Hideaki Kawano, Huixin Liu, Masakazu Watanabe, S. Abe, T. Uozumi, G. Maeda, Tohru Hada, Kiyohumi Yumoto, Capacity building activities at ICSWSE, SCOSTEP, International CAWSES-II meeting, 2013.11.20.
16. Akimasa Yoshikawa, Modeling of 3-fluid dynamic and generalized Ohm’s law for understanding ionospheric dynamics, JSPS Core-to-Core Program, 2013 ISWI and MAGDAS Africa School, 2013.09.23.
17. Akimasa Yoshikawa, MAGDAS/CPMN Project, UN/Austria Symposium on “Space Weather Data, Instruments and Models: Looking Beyond the International Space Weather Initiative, 2013.09.16.
18. G. Maeda, Kiyohumi Yumoto, Hideaki Kawano, Akimasa Yoshikawa, A. Ikeda, T. Uozumi, Huixin Liu, S. Abe, Masakazu Watanabe, Cardinal, M.G, MAGDAS Activities in Australia Since 2005, AOGS Annual meeting, 2013.06.25.
19. Magdi Elfadil Yousif Suliman, 吉川 顕正, 魚住 禎司, 湯元 清文, Remotely sensed of some parameters of the solar wind via a low-latitude Pc 5 index, 2013年度日本地球惑星科学連合大会, 2013.05.
20. Akimasa Yoshikawa, M-I couping theory, ECLAT Project Meeting, 2nd Project Review Graz, 2013.04.15.
21. Akimasa Yoshikawa, Current Closure from Polar to Equatorial Ionosphere via Cowling Channel,, EGU General Assembly 2013, 2013.04.11.
22. Akimasa Yoshikawa, State-of-art in 3D Ionosphere and internal ionospheric dynamics effect on M-I coupling, ISSI Forum "Near Earth Electro-magnetic Environment (Swarm and Cluster), 2013.04.03.
23. Akimasa Yoshikawa, Analogy of Magnetosphere-Ionosphere coupling and Corona-chromosphere-photosphere coupling, ISSI Workshop on "Standing MHD Waves", 2013.02.26.
24. Akimasa Yoshikawa, Technical presentation on the “International Center for Space Wather Science and Education”, Kyushu University, 第50回国連宇宙平和利用委員会, 2013.02.21.
25. Akimasa Yoshikawa, Formation of Cowling channel from Polar to Equatorial Ionosphere, the 2012 AGU Fall Meeting, 2012.12.06.
26. Run Shi, Huixin Liu, Akimasa Yoshikawa, 1D simulation of Electron acceleration by Inertial Alfven wave pulse, 第132回 地球電磁気・地球惑星圏学会総会・講演会, 2012.10.20.
27. Aoi Nakamizo, Akimasa Yoshikawa, T. Hori, A. Ieda, Y. Hiraki, K. Seiki, Y. Miyoshi, T. Kikuchi, Y. Ebihara, The Response of the Dayside Equatorial Electrojet to Step-like Changes of IMF Bz, 第132回 地球電磁気・地球惑星圏学会総会・講演会, 2012.10.20.
28. Akimasa Yoshikawa, Aoi Nakamizo, Shin Ohtani, Teiji Uozumi, Y. Tanaka, Formation of FAC -Cowling channel connecting from polar to equatorial ionosphere, 第132回 地球電磁気・地球惑星圏学会総会・講演会, 2012.10.20.
29. Akimasa Yoshikawa, Extraction of polarization field and magnetospheric impedance from the M-I coupled system via shear Alfven wave, 第132回 地球電磁気・地球惑星圏学会総会・講演会, 2012.10.20.
30. Akimasa Yoshikawa, Establishment of International Center fot Space Science and education, United Nations/Ecuador Workshop on the International Space Weather Initiative (20th Workshop of the United Nations Basic Space Science Initiative), 2012.10.08.
31. Akimasa Yoshikawa, Modeling of 3D Sq current system, JSPS Core-to-Core Program, 2012 ISWI and MAGDAS School on Space Science, 2012.09.25.
32. Akimasa Yoshikawa, Opening of International Space Wather Science and Education, UN/Austria Symposium on Space Weather Data Analysis, 2012.09.18.
33. 吉川 顕正, 魚住禎司, 湯元 清文, Sq電流系に於ける3次元カウリングチャンネルモデル, 2012年度日本地球惑星科学連合大会, 2012.05.22.
34. 吉川 顕正, 細川 敬祐, 小川 泰信, 電離圏に於ける入反射Alfven 波の分離, 2012年度日本地球惑星科学連合大会, 2012.05.22.
35. 吉川 顕正, Shin Ohtani, 中溝葵, 魚住禎司, Kiyohumi Yumoto, 極域から磁気赤道域にかけて形成されるCowlingチャンネル, 2012年度日本地球惑星科学連合大会, 2012.05.22.
36. 吉川 顕正, Ryoichi Fujii, Olaf Amm, Heikki Vanhamakki, On the importance of the Cowling/polarization mechanism for the electrodynamics of the ionosphere and magnetosphere, 2012年度日本地球惑星科学連合大会, 2012.05.22.
37. A self-consistent formulation for the evolution of ionospheric conductances at the ionospheric E-region within an M-I coupling scheme.
38. Hall Conjugate Analysis for extraction of Cowling Channel.
39. Generalized Cowling Channel in the global ionosphere.
40. Formation of Cowling Channel through the Inductive MI-Coupling Process.
41. On the Harang-discontinuity type ionospheric potential field deformation derived from the multi- functional ionospheric potential solver.
42. Magnetosphere-ionosphere coupling process for poleward moving auroral arcs.
43. Formation of Cowling Channel through the MI-Coupling Process via Shear Alfven Wave.
44. The α- and β-current separation of MI-coupled system using Whalen-relation and Hall conjugate current analysis.
45. Empirical Sq field model obtained from the 210°MMCPMN data during 1996-2007.
46. Long-term Sq variation in the 210 magnetic meridian region.
47. A detection of substorm precursors on geomagnetic data at auroral latitudes by SSA-based change-point analysis.
48. Alfvenic-coupling algorithm for analysis of FAC system.
49. Annual and Semi-annual Variations of Equivalent Sq Current System along the 210 MM.
Other Research Activities
  • 2007.12.
Membership in Academic Society
  • Japan Geoscience Union
  • European Geophysical Union
  • COMMITTEE ON SPACE RESEARCH
  • American Geophysical Union
  • Society of Geomagnetism and Earth, Planetary and Space Sciences
Educational
Other Educational Activities
  • 2011.03.
  • 2009.11.
  • 2009.04.
  • 2008.04.