6月7日(金)夜カフェ+地球物理学「火星における気象予報への道筋」開催

DSC_9947-thumb-600x401-4992

研究室談話室にて [Credit: 広報室]

6月7日(金)に、どなたでもお気軽にご参加いただける夜のトークイベントが開催されます。黒田助教が「火星における気象予報への道筋 全気候モデルにより示された降雪の規則性」について語り合います。みなさんのお申し込みをお待ちしております。

日時 = 2013年6月7日(金)18:00-19:45 ◎ 場所 = 理学研究科合同B棟2階エントランスホール ◎ 定員 = 20名 ◎ 申込み方法 = お名前、ご連絡先、ご身分を必ず明記して、FAX022-795-5831またはE-mail = sci-koho [at] mail.sci.tohoku.ac.jpのいずれかの方法でお申し込みください。*[at]を@に置き換えてください。

2013

  1. Hoshino, N, H. Fujiwara, M. Takagi, and Y. Kasaba, Effects of gravity waves on the day-night difference of the general circulation in the Venusian lower thermosphere, J. Geophys, Res., 118, 1-12, doi:10.1002/jgre.20154, 2013.
  2. Ishikawa, K., Y. Ezoe, Y. Miyoshi, N. Terada, K. Mitsuda, and T. Ohashi, Suzaku Observation of Strong Solar-Wind Charge-Exchange Emission from the Terrestrial Exosphere during a Geomagnetic Storm, Publications of the Astronomical Society of Japan (PASJ), 65, 63, 2013.
  3. Ishiyama, K., A. Kumamoto, T. Ono, Y. Yamaguchi, J. Haruyama, M. Ohtake, Y. Katoh, N. Terada, and S. Oshigami, Estimation of the permittivity and porosity of the lunar uppermost basalt layer based on observations of impact craters by SELENE, Journal of Geophysical Research, 118, doi:10.1002/jgre.20102, 2013.
  4. Kimura, T., L. Lamy, C. Tao, S. V. Badman, S. Kasahara, B. Cecconi, P. Zarka, A. Morioka, Y. Miyoshi, D. Maruno, , and M. Fujimoto, Long-term modulations of Saturn’s auroral radio emissions by the solar wind and seasonal variations controlled by the solar ultraviolet flux, J. Geophys. Res., DOI:10.1002/2013JA018833, 2013.
  5. Kitamura, N., K. Seki, Y. Nishimura, T. Hori, N. Terada, T. Ono, and R. J. Strangeway, Reduction of the field-aligned potential drop in the polar cap during large geomagnetic storms, Journal of Geophysical Research, 118, pp.4864-4874, doi:10.1002/jgra.50450, 2013.
  6. Kuroda, T., A.S. Medvedev, Y. Kasaba, and P. Hartogh, Carbon dioxide ice clouds, snowfalls, and baroclinic waves in the northern winter polar atmosphere of Mars, Geophys. Res. Lett., 40, 8, 1484-1488, 2013.
  7. Masunaga, K., Y. Futaana, G. Stenberg, S. Barabash, T. L. Zhang, A. Fedorov, S. Okano, and N. Terada, Dependence of O+ escape rate from the Venusian upper atmosphere on IMF directions, Geophysical Research Letters, 40, pp.1682-1685, doi:10.1002/grl.50392, 2013.
  8. Matsuda, K., Y. Katoh, N. Terada and H. Misawa, A simulation study of Io-related Jovian decametric radiation: Control factor of occurrence probability, Journal of Geophysical Research, 118, pp.5082-5098, doi:10.1002/jgra.50493, 2013.
  9. Medvedev, A.S., E. Yiğit, T. Kuroda, and P. Hartogh, General circulation modeling of the Martian upper atmosphere during global dust storms, J. Geophys. Res., 118, 2234–2246, 2013.
  10. Morioka, A., Y. Miyoshi, S. Kurita, Y. Kasaba, V. Angelopoulos, H. Misawa, H. Kojima, and J.P. McFadden, Universal time control of AKR: Earth is a spin-modulated variable radio source, J. Geophys. Res., 118, 3, 1123-1131, 2013.
  11. Nakagawa, H., N. Hoshino, M. Sornig, Y. Kasaba, G. Sonnabend, D. Stupar, S. Aoki, and I. Murata, Comparison of general circulation model atmospheric wave simulations with wind observations of venusian mesosphere, Icarus, 225, 1, 840-849, 2013.
  12. Sai, K., Y. Katoh, N. Terada, and T. Ono, Effect of background magnetic field on turbulence driven by magnetorotational instability in accretion disks, Astrophysical Journal, 767, 165, doi:10.1088/0004-637X/767/2/165, 2013.
  13. 齋和人, 加藤雄人, 寺田直樹, 小野高幸, 降着円盤中での磁気乱流生成過程に関する数値実験, 東北大学サイバーサイエンスセンター大規模科学計算システム広報SENAC, 46, 4, pp.1-6, 2013.
  14. Sato, T.M., T. Satoh, and Y. Kasaba, Retrieval of jovian cloud structure from the Cassini ISS limb-darkening data. I. Continuum scattering phase functions for cloud and haze in the South Tropical Zone, Icarus, 222, 1, 100-121, 2013.
  15. Seki, K., N. Terada, M. Yagi, D.C. Delcourt, F. Leblanc, and T. Ogino, Effects of the surface conductivity and the IMF strength on the dynamics of planetary ions in Mercury’s magnetosphere, Journal of Geophysical Research, 118, pp.3233-3242, doi:10.1002/jgra.50181, 2013.
  16. Sornig, M., G. Sonnabend, D. Stupar, P. Kroetz, H. Nakagawa, and I. Mueller-Wodarg, Venus’ upper atmospheric dynamical structure from ground-based observations shortly before and after Venus’ inferior conjunction 2009, Icarus, 225, 828-839, 2013.

2012

  1. Delcourt, D.C., K. Seki, N. Terada, and T. E. Moore, Centrifugally stimulated exospheric ion escape at Mercury, Geophys. Res. Lett., 39, L22105, doi:10.1029/2012GL054085, 2012.
  2. Ezoe, Y., R. Fujimoto, N.Y. Yamasaki, K. Mitsuda, T. Ohashi, K. Ishikawa, S. Oishi, Y. Miyoshi, N. Terada, Y. Futaana, S. F. Porter, and G. Brown, Suzaku Observations of Charge Exchange Emission from Solar System Objects, Astronom. Nachrichten, 333, 4, 319-323, doi:10.1002/asna.201211664, 2012.
  3. Hoshino, N., H. Fujiwara, M. Takagi, Y. Takahashi, and Y. Kasaba, Characteristics of planetary-scale waves simulated by a new venusian mesosphere and thermosphere general circulation model, Icarus, 217, 2, 818-830, 2012.
  4. Kasai, Y., H. Sagawa, T. Kuroda, T. Manabe, S. Ochiai, K. Kikuchi, T. Nishibori, P. Baron, J. Mendrok, P. Hartogh, D. Murtagh, J. Urban, F. von Scheele, U. Frisk, Overview of the Martian atmospheric submillimetre sounder FIRE, Planet. Space Sci., 63-64, 62-82, DOI:10.1016/j.pss.2011.10.013, 2012.
  5. Kitamura, N., Y. Nishimura, M. O. Chandler, T. E. Moore, N. Terada, T. Ono, A. Shinbori, and A. Kumamoto, Storm-time electron density enhancement in the cleft ion fountain, J. Geophys. Res., 117, A11212, doi:10.1029/2012JA017900, 2012.
  6. Kitamura, N., K. Seki, Y. Nishimura, N. Terada, T. Ono, T. Hori, and R. J. Strangeway, Photoelectron flows in the polar wind during geomagnetically quiet periods, J. Geophys. Res., 117, A07214, doi:10.1029/2011JA017459.
  7. Kobayashi, T., J.H. Kim, S.R. Lee, A. Kumamoto, H. Nakagawa, S. Oshigami, H. Oya, Y. Yamaguchi, A. Yamaji, and T. Ono, Synthetic Aperture Radar Processing of Kaguya Lunar Radar Sounder Data for Lunar Subsurface Imaging, Geosci. Remote Sensing, 99, 1-14, 2012.
  8. Kohlhepp, R., R. Ruhnke, M. P. Chipperfield, M. De Maziere, J. Notholt, S. Barthlott, R. L. Batchelor, R. D. Blatherwick, Th. Blumenstock, M. T. Coffey, P. Demoulin, H. Fast, W. Feng, A. Goldman, D. W. T. Griffith, K. Hamann, J. W. Hannigan, F. Hase, N. B. Jones, A. Kagawa, I. Kaiser, Y. Kasai, O. Kirner, W. Kouker, R. Lindenmaier, E. Mahieu, R. L. Mittermeier, B. Monge-Sanz, I. Morino, I. Murata, H. Nakajima, M. Palm, C. Paton-Walsh, U. Raffalski, Th. Reddmann, M. Rettinger, C. P. Rinsland, E. Rozanov, M. Schneider, C. Senten, C. Servais, B.-M. Sinnhuber, D. Smale, K. Strong, R. Sussmann, J. R. Taylor, G. Vanhaelewyn, T. Warneke, C. Whaley, M. Wiehle, and S. W. Wood, Observed and simulated time evolution of HCl, ClONO2, and HF total column abundances, Atmos. Chem. Phys., 12, 3527-3557, doi:10.5194/acp-12-3527-2012, 2012.
  9. Matsuda, K., N. Terada, Y. Katoh, and H. Misawa, A simulation study of the current-voltage relationship of the Io tail aurora, J. Geophys. Res., 117, A10214, doi:10.1029/2012JA017790, 2012.
  10. Tsugawa, Y., Y. Katoh, N. Terada, T. Ono, H. Tsunakawa, F. Takahashi, H. Shibuya, H. Shimizu, M. Matsushima, Y. Saito, S. Yokota, and M. N. Nishino, Statistical study of broadband whistler-mode waves detected by Kaguya near the Moon, Geophys. Res. Lett., 39, L16101, doi:10.1029/2012GL052818, 2012.
  11. Uno, T., T. Sakanoi, C. Tao, and Y. Kasaba, The thermosphere of Jupiter investigated by ground-based near infrared observations, Planetary People (Yuu-Sei-Jin), 21, 1, 22-28, 2012.
  12. Yoshikawa, I., F. Tsuchiya, and N. Terada, 小型科学衛星1号機Sprint-A/EXCEED計画の概要, The thermosphere of Jupiter investigated by ground-based near infrared observations, Planetary People (Yuu-Sei-Jin), 21, 1, 16-21, 2012.

2011

  1. Fujiwara, H., Y. Miyoshi, H. Jin, H. Shinagawa, and K. Terada, Characteris-tics of temperature and density structures in the equatorial thermosphere simulated by a whole atmosphere GCM, Aeronomy of the Earth’s atmosphere and ionosphere, Div. II, IAGA book, ed. Abdu, Pancheva, and Bhattacharya, Vol.2, doi:10.1007/978-94-007-0326-1, 329-337, 2011.
  2. Jin, H., Y. Miyoshi, H. Fujiwara, H. Shinagawa, K. Terada, N. Terada, M. Ishii, Y. Otsuka, and A. Saito, Vertical connection from the tropospheric activities to the ionospheric longitudinal structure simulated by a new Earth’s whole atmosphere-ionosphere coupled model, J. Geophys. Res., 116, A01316, doi:10.1029/2010JA015925, 2011.
  3. Medvedev, A.S., T. Kuroda, and P. Hartogh, Review Article: Influence of dust on the dynamics of the martian atmosphere above the first scale height, Aeolian Research, 3, 145-156, 2011.
  4. Miyoshi, Y., H. Fujiwara, H. Jin, H. Shinagawa, H. Liu, and K. Terada, Model study on the formation of the equatorial mass density anomaly in the thermosphere, J. Geophys. Res., 116, A05322, 10.1029/2010JA016315, 2011.
  5. Morioka, A., Y. Miyoshi, F. Tsuchiya, H. Misawa, Y. Kasaba, T. Asozu, S. Okano, A. Kadokura, N. Sato, H. Miyaoka, K. Yumoto, G.K. Parks, F. Honary, J.G. Trotignon, P.M.E. Decreau, and B.W. Reinisch, On the simultaneity of substorm onset between two hemispheres, J. Geophys. Res., 116, A04211, 10.1029/2010JA016174, 2011.
  6. Nakamura, M., T. Imamura, N. Ishii, T. Abe, T. Satoh, M. Suzuki, M. Ueno, A. Yamazaki, N. Iwagami, S. Watanabe, M. Taguchi, T. Fukuhara, Y. Takahashi, M. Yamada, N. Hoshino, S. Ohtsuki, K. Uemizu, G.L. Hashimoto, M. Takagi, Y. Matsuda, K. Ogohara, N. Sato, Y. Kasaba, T. Kouyama, N. Hirata, R. Nakamura, Y. Yamamoto, N. Okada, T. Horinouchi, M. Yamamoto, and Y. Hayashi, Overview of Venus orbiter, Akatsuki, Earth Planet. Space, 63, 5, 443-457, 2011.
  7. Obuchi,Y., T. Sakanoi, K. Asamura, A. Yamazaki, Y. Kasaba, M. Hirahara, Y. Ebihara, and S. Okano, Fine‐scale dynamics of black auroras obtained from simultaneous imaging and particle observations with the Reimei satellite, J. Geophys. Res., 116, A00K07, doi:10.1029/2010JA016321, 2011.
  8. Ogasawara, K., Y. Kasaba, Y. Nishimura, T. Hori, T. Takada, Y. Miyashita, V. Angelopoulos, S.B. Mende, and J. Bonnell, Azimuthal auroral expansion associated with fast flows in the near-Earth plasma sheet: Coordinated observations of the THEMIS all-sky imagers and multiple spacecraft, J. Geophys. Res., 116, A06209, 10.1029/2010JA016032, 2011.
  9. Sanchez-Lavega, A., G.S. Orton, R. Hueso, S. Perez-Hoyos, L.N. Fletcher, E. Garcia-Melendo, J.M. Gomez-Forrellad, I. de Pater, M. Wong, H.B. Hammel, P. Yanamandra-Fisher, A. Simon-Miller, N. Barrado-Izagirre, F. Marchis, O. Mousis, J.L. Ortiz, J. Garcia-Rojas, M. Cecconi, J.T. Clarke, K. Noll, S. Pedraz, A. Wesley, P. Kalas, N. McConnell, W. Golisch, D. Griep, P. Sears, E. Volquardsen, V. Reddy, M. Shara, R. Binzel, W. Grundy, J. Emery, A. Rivkin, C. Thomas, D. Trilling, K. Bjorkman, A.J. Burgasser, H. Campins, T.M. Sato, Y. Kasaba, J. Ziffer, R. Mirzoyan, M. Fitzgerald, H. Bouy, and The International Outer PLANET Watch Team (Iopw-Pvol), Long-term evolution of the aerosol debris cloud produced by the 2009 impact on Jupiter, Icarus, 214, 2, 462-476, 2011.
  10. Sato, T.M., H. Fujiwara, Y.O. Takahashi, Y. Kasaba, V. Formisano, M. Giuranna, and D. Grassi, Tidal variations in the Martian lower atmosphere inferred from Mars Express Planetary Fourier Spectrometer temperature data, Geophys. Res. Lett., 38, L24205, doi:10.1029/2011GL050348, 2011.
  11. Venkateswara Rao, N., T. Tsuda, S. Gurubaran, Y. Miyoshi, and H. Fujiwara, On the occurrence and variability of the terdiurnal tide in the equatorial mesosphere and lower thermosphere and a comparison with the Kyushu-GCM, J. Geophys. Res., 116, D02117, 10.1029/2010JD014529, 2011.
  12. Yamashita, K., Y. Takahashi, M. Sato, and H. Kase, Improvement in lightning geolocation by time-of-arrival method using global ELF network data, J. Geophys. Res., 116, A00E61, doi:10.1029/2009JA014792, 2011.
  13. Yoshizawa, A., H. Abe, H. Fujiwara, Y. Mizobuchi, and Y. Matsuo, Turbulent-viscosity modeling applicable to swirling flows, based on a composite time scale with mean flow helicity partially incorporated J. Turbulence, 12, 10.1080/14685248.2010.530666, 2011.

オゾンホールの日本への影響

環境問題の一つとしてオゾン層の破壊が挙げられる。フロンガスの規制は行われているものの、大気中に蓄積したフロンによりオゾンホールの規模はいまだ縮小し始めていない。2011 年春季には北極観測史上最大のオゾンホールが観測された。このオゾンホール自体は極渦内部で起きる現象のため人が多く住む中緯度地域への影響は少ないが、下部成層圏においてオゾンを再生する化学反応は存在しないので、極渦の崩壊後にはオゾン破壊のおきた空気塊が拡散し中緯度大気に影響を及ぼす。本研究はつくば上空における極渦崩壊前後のオゾンの濃度を比較することによって、オゾン層破壊の影響が日本にどの程度あるのか調べることを目的とする。
つくばの国立環境研究所ではフーリエ変換型分光計(FTIR)を用いて大気微量成分の観測を行っており、東北大学ではこの観測スペクトルを用いて解析を行っている。本研究ではオゾン、フッ化水素(HF)についてスペクトルフィッティングプログラムSFIT2 を用いて高度分布を導出している。
下部成層圏ではHF は化学的に安定で、力学的輸送の指標として使えるためHFを同時に調べている。オゾンとHF の相関を取ることで力学的変動分をキャンセルし、求めたいオゾンの化学破壊による変動分を導出することができる。極渦崩壊前後のオゾンとHF との相関を比較し、オゾンの化学破壊を経験した空気塊がどの程度中緯度に影響を及ぼすかを調べている。
後藤(2010)は同じつくばの観測から2008 年までの解析を行っており、2005-2008 年の3 月から5 月に観測された高度19km 付近における中緯度空気塊のオゾン-HF 相関から2007、2008 年には極渦崩壊後にオゾン量が減少していることを見出した。その減少量は0.2-0.4ppm であった。本研究では研究方法の有効性の検証を含めて2002-2011 年の年間の日本上空へのオゾン層破壊の影響を調べる。

The ozone depletion is one of the environmental problems. In 2011, ozone depletion which was comparable to the Antarctic ozone hole occurred in the Arctic.
The ozone depletion has occurred inside the polar vortex. The airmass from inside the polar vortex is spread to mid-latitude in spring after its breakup. The purpose of this study is to quantify the impact of polar ozone depletion on mid-latitude by comparing the amounts of ozone in mid-latitude airmasses before and after the breakup of the polar vortex.
Vertical profiles of ozone and hydrogen fluoride (HF) have been retrieved from infrared spectra observed with a Fourier transform infrared spectrometer (FTIR) at Tsukuba using the SFIT2 spectral fitting program developed by Rinsland et al. [1998].
HF can be used as a tracer of the transport, because HF is a remarkably stable species in the stratosphere. Ozone and HF usually show a very high correlation in the lower stratosphere because both species are stable. But the correlation will be changed when ozone is chemically perturbed. Therefore, we examined the correlations of mixing ratios between ozone and HF in the mid-latitude airmasses before and after the breakup.
Goto et al. [2010] compared the ozone-HF mixing ratio correlations in the mid-latitude airmasses before and after the breakups of the polar vortex between 2005 and 2008 and indicated that ozone was decreased by 0.2 to 0.4 ppmv at around 19km altitude in 2007 and 2008.But she did not investigate ozone-HF mixing ratio correlations from January to December. So,we investigate  the annual impacts of the Arctic ozone depletion on Japan in 2002-2011.

火星のCO2雲の詳細特性

Credit by ESA

Credit by ESA

火星では大気の主成分(CO2)が凝結し、雲や雪になるという非常に珍しい現象が起きています。その中でも中低緯度帯の中間圏に存在するCO2氷雲は、近年になって観測が進み、現在でも雲の分布や性質を明らかにしようと様々な研究がなされています。私たちはイタリアの研究チームと協力し、火星を周回する観測機器の中で最も高い波長分解能を誇るフーリエ分光器PFSを用いてCO2の雲を分光観測することに成功しました。この高波長分解能の観測によって得られたスペクトルによって未解明の雲の詳細構造を明らかにしていく研究を私たちは行っています。(佐藤 佑紀)

CO2, which is the main component of Martian atmosphere, condenses in the coldest region on Mars and forms  cloud or snow. Especially, CO2 ice clouds existing Martian mesosphere have been observed recent years. We succeeded to observe the spectral signal of CO2 ice clouds using Planetary Fourier Spectrometer(PFS) which has the highest spectral resolution among instruments orbiting Mars with Italian team IAPS. The spectra obtained by PFS potentially permit us to know the cloud optical feature for example optical depth and particle size.

2010

  1. Fujiwara, H., and Y. Miyoshi, Morphological features and variations of temperature in the upper thermosphere simulated by a whole atmosphere GCM, Ann. Geophys., 25, 427-437, 2010.
  2. Kasaba, Y., J.-L. Bougeret, L. G. Blomberg, H. Kojima, S. Yagitani, M. Moncuquet, J.-G. Trotignon, G. Chanteur, A. Kumamoto, Y. Kasahara, J. Lichtenberger, Y. Omura, K. Ishisaka, H. Matsumoto, The Plasma Wave Investigation (PWI) onboard the BepiColombo/MMO: First measurement of electric fields, electromagnetic waves, and radio waves around Mercury, Planet. Space Sci., 58, 238-278, 2010.
  3. Kasaba, Y., A. Kumamoto, K. Ishisaka, H. Kojima, K. Higuchi, A. Watanabe, and K. Watanabe, Development of stiff and extendible electromagnetic sensors for space missions, Adv. Geosciences, 21, 447-459, 2010.
  4. Kasaba, Y., H. Nakagawa, K. Aoki, I. Murata, T. Sakanoi, and S. Okano, High resolution laser spectroscopy in mid-infrared, Kogaku, 39, 12, 595-597, 2010.
  5. Kobayashi, G. Inoue, M. Kawasaki, H. Yoshioka, M. Minomura, I. Murata, T. Nagahama, Y. Matsumi, T. Tanaka, I. Morino, and T. Ibuki, Remotely operable compact instruments for measuring atmospheric CO2 and CH4 column densities at surface monitoring sites, Atmos. Meas. Tech., 3, 1103-1112, 2010.
  6. Milillo, A., M. Fujimoto, E. Kallio, S. Kameda, F. Leblanc, Y. Narita, G. Cremonese, H. Laakso, M. Laurenza, S. Massetti, S. McKenna-Lawlor, A. Mura, R. Nakamura, Y. Omura, D.A. Rothery, K Seki, M. Storini, P. Wurz, W. Baumjohann, E.J. Bunce, Y. Kasaba, J. Helbert, A. Sprague, Hermean Environment WG members, The BepiColombo mission: An outstanding tool for investigating the Hermean environment, Planet. Space Sci., 58, 40-60, 2010.
  7. Miyoshi, Y., K. Seki, K. Shiokawa, T. Ono, Y. Kasaba, A. Kumamoto, M. Hirahara, T. Takashima, K. Asamura, A. Matsuoka, T. Nagatsuma, and ERG Working Group, Geospace Exploration Mission: ERG Project, Trans. Japan. Soc. Aerospace Tech. Japan, 8, Tm_1-6, 2010.
  8. Miyoshi, Y., K. Seki, K. Shiokawa, T. Ono, Y. Kasaba, A. Kumamoto, M. Hirahara, T. Takashima, K. Asamura, A. Matsuoka, T. Nagatsuma, and ERG Working Group, Erratum: Geospace Exploration Mission: ERG Project, Trans. Japan. Soc. Aerospace Tech. Japan, 8, Tm_13, 2010.
  9. Morioka, A, Y. Miyoshi, Y. Miyashita, Y. Kasaba, H. Misawa, F. Tsuchiya, R. Kataoka, A. Kadokura, T. Mukai, K. Yumoto, D.J. Menietti, G. Parks, K. Liou, F. Honary, and E. Donovan, Two-step evolution of auroral acceleration at substorm onset, J. Geophys. Res., 115, A11, 10.1029/2010JA015361, 2010.
  10. Nozawa, S., Y. Ogawa, S. Oyama, H. Fujiwara, T. Tsuda, A. Brekke, C. M. Hall, Y. Murayama, S. Kawamura, H. Miyaoka, and R. Fujii, Tidal waves in the polar lower thermosphere observed using the EISCAT long run data set obtained in September 2005, J. Geophys. Res., 115, A08312, doi:10.1029/2009JA015237, 2010.
  11. Taguchi, M., Y. Shoji, Y. Sakamoto, K. Yoshida, Y. Takahashi, T. Teraguchi, T. Ohnishi, S. Battazzo, T. Sato, N. Hoshino, T. Uno, and A. Yoshimura, A balloon-borne telescope developed for remote sensing of planets from the polar stratosphere, JAXA Research and Development Report, JAXA-RR-09-007, 2010.
  12. Tao, C., H. Fujiwara, and Y. Kasaba, Jovian magnetosphere-ionosphere current system characterized by diurnal variation of ionospheric conductance, Planet. Space Sci., 58, 351-364, 2010.
  13. Terada, K., N. Terada, H. Fujiwara, Y. Kato, and Y. Kasaba, Effect of solar wind dynamic pressure on the production ratio of pick up O+ ion from Mars, SENAC (Tohoku Univ. Cyber Science Center), 43, 2, 61-66, 2010.
  14. Venkateswara Rao, N., T. Tsuda, S. Gurubaran, Y. Miyoshi, and H. Fujiwara, On the occurrence and variability of the terdiurnal tide in the equatorial Mesosphere and Lower Thermosphere and its comparison with the Kyushu-GCM, J. Geophys. Res., 116, D02117, doi:10.1029/2010JD014529, 2010.
  15. Yoshida, K., Y. Takahashi, Y. Sakamoto, E. Ujiie, K. Takiuchi, Y. Nakazato, T. Sawakami, T. Sakanoi, Y. Kasaba, S. Kondo, K. Yamashita, S. Ueda, T. Takashima, K. Nakazawa, T. Mitani, T. Enoto, M. Sato, U. Inan, I. Linscott, F. Bruhn, and Y. Masumoto, SPRITE-SAT: a micro satellite for scientific observation of transient luminous events and terrestrial gamma-ray flashes, Trans. Japan. Soc. Aerospace Tech. Japan, 8, Tm_7-12, 2010.
  16. Yoshikawa, I., K. Yoshioka, G. Murakami, A. Yamazaki, S. Kameda, M. Ueno, N. Terada, F. Tsuchiya, M. Kagitani, and Y. Kasaba, Extreme Ultraviolet Spectroscope for Exospheric Dynamics Explore (Exceed), Adv. Geosciences, 19, 579, 2010.

2009

  1. Asamura, K., C.C. Chaston, Y. Itoh, M. Fujimoto, T. Sakanoi, Y. Ebihara, A. Yamazaki, M. Hirahara, K. Seki, Y. Kasaba, and M. Okada, Sheared flows and small-scale Alfv´en wave generation in the auroral acceleration region, Geophys. Res. Lett., 36, L05105, doi:10.1029/2008GL036803, 2009.
  2. Blanc, M., Y. Alibert, N. Andre, S. Atreya, R. Beebe, W. Benz, S.J. Bolton, A. Coradini, A. Coustenis, V. Dehant, M. Dougherty, P. Drossart, M. Fujimoto, O. Grasset, L. Gurvits, P. Hartogh, H. Hussmann, Y. Kasaba, M. Kivelson, K. Khurana, N. Krupp, P. Louarn, J. Lunine, M. McGrath, D. Mimoun, O. Mousis, J. Oberst, T. Okada, R. Pappalardo, O. Prieto-Ballesteros, D. Prieur, P. Regnier, M. Roos-Serote, S. Sasaki, G. Schubert, C. Sotin, T. Spilker, Y. Takahashi, T. Takashima, F. Tosi, D. Turrini, T. van Hoolst, and L. Zelenyi , LAPLACE: A mission to Europa and the Jupiter System for ESA’s Cosmic Vision Programme, Experimental Astronomy, 23, 3, 849-892, 2009.
  3. Fujimoto, M., Y. Tsuda, Y. Saito, I. Shinohara, T. Takashima, A. Matsuoka, H. Kojima, and Y. Kasaba, The SCOPE Mission, AIP Conf. Proc.: Future perspectives of space plasma and particle instrumentation and international collaborations, 1144, 29-35, 2009.
  4. Fujiwara, H., Y. Miyoshi, Global structure of large-scale disturbances in the thermosphere produced by effects from the upper and lower regions: simulations by a whole atmosphere GCM, Earth Planets Space, 61, 463-470, 2009.
  5. Kasaba, Y., M. T. Capria, D. Crichton, J. Zender, R. Beebe, and the IPDA, The International Planetary Data Alliance (IPDA): Activities in 2008-2010, Space Research Today, 176, 40-45, 2009.
  6. Kasaba, Y., T. Takashima, and H. Misawa, A Jovian Small Orbiter for magnetospheric and auroral studies with the Solar-Sail project, AIP Conf. Proc.: Future perspectives of space plasma and particle instrumentation and international collaborations, 1144, 228-231, 2009.
  7. Kaneda, K., N. Terada, and S. Machida, Solar-wind control of the hot-oxygen corona around Mars, J. Geophys. Res., 114, E02007, doi:10.1029/2008JE003234, 2009.
  8. Kuo, C.L., J.K. Chou, L.Y. Tsai, A.B. Chen, H.T. Su, R.R. Hsu, S.A. Cummer, H.U. Frey, S.B. Mende, Y. Takahashi, and L.C. Lee, Discharge processes, electric field, and electron energy in ISUAL-recorded gigantic jets, J. Geophys. Res., 114, A04314, DOI: 10.1029/2008JA013791, 2009.
  9. Miyoshi, Y., H. Fujiwara, Gravity waves in the equatorial thermosphere and their relation to the lower atmospheric variability, Earth Planets Space, 61, 471-478, 2009.
  10. Nakagawa, H., H. Fukunishi, S. Watanabe, Y. Takahashi, M. Taguchi, and R. Lallement, Latitudinal dependence of the solar wind density derived from remote sensing measurements using interplanetary Lyman alpha emission from 1999 to 2002, Earth, Planets, Space, 61, 3, 373-382, 2009.
  11. Nakagawa, H., Y. Kasaba, H. Maezawa, A. Hashimoto, H. Sagawa, I. Murata, S. Okano, S. Aoki, N. Moribe, A. Mizuno, M. Momose, T. Ohnishi, N. Mizuno, and T. Nagahama, Search of SO2 in the Martian atmosphere by ground-based submillimeter observation, Planet. Space Sci., 57, 2123-2127, 2009.
  12. Oka, M., T. Terasawa, M. Fujimoto, H. Matsui, Y. Kasaba, Y. Saito, H. Kojima, H. Matsumoto, T. Mukai, Non-thermal Electrons at the Earth’s Bow Shock: A ‘Gradual’ Event, Earth, Planets, Space, 61, 603-606, 2009.
  13. Oyama, S., T.T. Tsuda, T. Sakanoi, Y. Obuchi, K. Asamura, M. Hirahara, A. Yamazaki, Y. Kasaba, R. Fujii, S. Nozawa, and B.J. Watkins, Spatial evolution of frictional heating and the predicted thermospheric-wind effects in the vicinity of an auroral arc measured with the Sondrestrom incoherent-scatter radar and the Reimei satellite, J. Geophys. Res., 114, A07311, doi:10.1029/2009JA014091, 2009.
  14. Seki, Y., M.N. Nishino, M. Fujimoto, Y. Miyashita, K. Keika, H. Hasegawa, K. Okabe, Y. Kasaba, T. Terasawa, T. I. Yamamoto, I. Shinohara, Y. Saito, and T. Mukai, Observations of loss-cone shaped backstreaming energetic protons upstream of the Earth’s bow shock, J. Geophys. Res., 114, A11106, doi:10.1029/2009JA014136, 2009.
  15. Takahashi, Y., and N. Hoshino, Observational strategy and performance tests of Lightning and Airglow Camera: LAC, YuuSeiJin, 4, 238, 2009.
  16. Tao, C., H. Fujiwara, Y. Kasaba, Neutral wind control of the Jovian magnetosphere-ionosphere current system, J. Geophys. Res., 114, A08307, doi:10.1029/2008JA013966, 2009.
  17. Terada, N., A. Matsuoka, K. Seki, A. Yamazaki, Y. Futaana, S. Yokota, Y. Saito, H. Nakagawa, Y. Kasaba, S. Tachibana, J. Ogawa, T. Satoh, and The MELOS Working Group, Challenge of MELOS: Martian atmospheric escape and evolution, Japanese Soc. Planet. Sci., 18, 73-75, 2009.
  18. Terada, N., H. Shinagawa, T. Tanaka, K. Murawski, and K. Terada, A three-dimensional, multispecies, comprehensive MHD model of the solar wind interaction with the planet Venus, J. Geophys. Res., 114, A09208, doi:10.1029/2008JA013937, 2009.
  19. Yair Y, Y., Takahashi, R. Yaniv, U. Ebert, and Y. Goto, A study of the possibility of sprites in the atmospheres of other planets, J. Geophys. Res., 114, E09002, DOI: 10.1029/2008JE003311, 2009.
  20. Yamashita, K., T. Otsuyama, Y. Hobara, M. Sekiguchi, Y. Matsumoto, M. Hayakawa and V. Korepanov, Global distribution and characteristics of intense lightning discharges as deduced from ELF ansients observed at Moshiri (Japan). J. Atmos. Electric., 29, 2, 71-80, 2009.

2008

  1. 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, L.C. Lee, Electric fields and electron energies in sprites and temporal evolutions of lightning charge moment, J. Physics D: Applied Physics, 41, 23, 234010, 2008.
  2. Chen, A.B., C.-L. Kuo, Y.-J. Lee, H.-T. Su, R.-R. Hsu, J.-L. Chern, H. U. Frey, S. B. Mende, Y. Takahashi, H. Fukunishi, Y.-S. Chang, T.-Y. Liu, L.-C. Lee, Global distributions and occurrence rates of transient luminous events, J. Geophys. Res., 113, A08306, doi:10.1029/2008JA013101, 2008.
  3. 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, Parameterisation of the chemical effect of sprites in the middle atmosphere, Ann. Geophys., 26, 1, 12-26, 2008.
  4. Forbes, J. M., S. L. Bruinsma, Y. Miyoshi, H. Fujiwara, A solar terminator wave in thermosphere neutral densities measured by the CHAMP satellite, Geophys. Res. Lett., 35, L14802, doi:10.1029/2008GL034075, 2008.
  5. Hasunuma, T., T. Nagatsuma, R. Kataoka, Y. Takahashi, H. Fukunishi, A. Matsuoka, and A. Kumamoto, Statistical study of polar distribution of mesoscale field-aligned currents, J. Geophys. Res., 113, A12214, DOI: 10.1029/2008JA013358, 2008.
  6. Hiraki, Y., C. Tao, Parameterization of ionization rate by auroral electron precipitation in Jupiter, Ann. Geophys., 26, 1, 77-86, 2008.
  7. Iwagami, N., K. Ohtsuki, N. Tokuda, Y. Ohira, Y. Kasaba, T. Imamura, H. Sagawa, G.L. Hashimoto, S. Takeuchi, M. Ueno, S. Okumura, Hemispheric distributions of HCl above and below the Venus’ clouds by ground-based 1.7 um spectroscopy, Planet. Space Sci., 56, 1424-1434, 2008.
  8. Jin, H., Y. Miyoshi, H. Fujiwara, H. Shinagawa, Electrodynamics of the formation of ionospheric wavenumber-four longitudinal structure, J. Geophys. Res., 113, A09307, doi:10.1029/2008JA013301, 2008.
  9. Miyoshi, Y., H. Fujiwara, Gravity waves in the thermosphere simulated by a general circulation model, J. Geophys. Res., doi:10.1029/2007JD00874, 2008.
  10. Nakagawa, H., M. Bzowski, A. Yamazaki, H. Fukunishi, S. Watanabe, Y. Takahashi, M. Taguchi, I. Yoshikawa, K. Shiomi, M. Nakamura, UV optical measurements of the Nozomi spacecraft interpreted with a two-component LIC-flow model, Astron. Astrophys., 491, 1, 29-41, 2008.
  11. Obuchi, Y., T. Sakanoi, A. Yamazaki, T. Ino, S. Okano, Y. Kasaba, M. Hirahara, Y. Kanai, N. Takeyama, Initial observations of auroras by the multi-spectral auroral camera on board the Reimei satellite, Earth Planets Space, 60(8), 827-835, 2008.
  12. Ohtsuki, S., N. Iwagami, H. Sagawa, M. Ueno, Y. Kasaba, T. Imamura, E. Nishihara, Imaging spectroscopy of the Venus 1.27-μm O2 airglow with ground-based telescopes, Adv. Space Res., 41(9), 1375-1380, 2008.
  13. Ohtsuki, S., N. Iwagami, H. Sagawa, M. Ueno, Y. Kasaba, T. Imamura, K. Yanagisawa, E. Nishihara, Distributions of the Venus 1.27-mu m O2 airglow and rotational temperature, Planet. Space Sci., 56(10), 1391-1398, 2008.
  14. Okazaki, Y., A. Fushishita, T. Narumi, C. Kato, S. Yasue, T. Kuwabara, J.W. Bieber, P. Evenson, M.R. Da Silva, A. Dal Lago, N.J. Schuch, Z. Fujii, M.L. Duldig, J.E. Humble, I. Sabbah, J. Kota, K. Munakata, Drift effects and the cosmic ray density gradient in a solar rotation period: First observation with the Global Muon Detector Network (GMDN), Astrophys. J., 681, 1, 693-707, 2008.
  15. Shimoda, T., S. Machida, T. Mukai, Y. Saito, Y. Kasaba, H. Hayakawa, Evaluation of the asymmetry in photoelectron distribution around the GEOTAIL spacecraft, IEEE Tans. Plasma Sci., 36(5), 2253-2261, 2008.
  16. Simoes, F., M. Rycroft, N. Renno, Y. Yair, K.L. Aplin, Y. Takahashi, Schumann resonances as a means of investigating the electromagnetic environment in the solar system, Space Sci. Rev., 137, 1-4, 455-471, 2008.
  17. Takahashi, Y., J. Yoshida, Y. Yair, T. Imamura, and M. Nakamura, Lightning detection by LAC onboard the Japanese Venus Climate Orbiter, Planet-C, Space Sci. Rev., 137, 1-4, 317-334, 2008.
  18. Yamakawa, H., H. Ogawa, Y. Sone, H. Hayakawa,Y. Kasaba, T. Takashima, T. Mukai, T. Tanaka, M. Adachi, BepiColombo Mercury magnetospheric orbiter design, Acta Astronautica, 62, 699 – 705, 2008.