研究者詳細 - 塩川　和夫

論文 - 塩川　和夫

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1.宇宙観測-太陽・地球系空間観測-1.3 人工衛星を用いたオーロラ観測査読有り

塩川和夫

プラズマ・核融合学会誌 = Journal of plasma and fusion research 72 巻 ( 1 ) 頁： 29-33 1996年1月

記述言語：英語掲載種別：研究論文（学術雑誌）

It is important to monitor global auroral images which are the ionospheric projection of the plasma distribution in the magnetosphere. In the 1970's the auroral images were taken by using scanning photometers on board the ISIS-2 and DMSP satellites. One image was obtained for each polar pass of the satellites. In the 1980's, high time-resolution auroral images in UV wavelengthes were obtained by the KYOKKO. DE. VIKING, and AKEBONO satellites, using multichannel plate with CCD cameras. Fabri-Perot interferometer and monochromatic imaging photometers are also on board the DE satellites to make remote-sensing observations of the atmospheric dynamics through auroral emissions.

Quasi-periodic poleward motions of sun-alighed auroral arcs in the high-latitude morning sector: A case study 査読有り

Journal of Geophysical Research 101 巻頁： A9 1996年

Characteristics of low-latitude Pi 2 pulsations along the 210 degrees magnetic meridian 査読有り

Osaki H, Yumoto K, Fukao K, Shiokawa K, Menk FW, Fraser BJ

JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY 48 巻 ( 11 ) 頁： 1421-1430 1996年

Auroral observations using automatic optical instruments: Relations with multiple Pi 2 magnetic pulsations 査読有り

Shiokawa K, Yumoto K, Tanaka Y, Osaki H, Sato M, Kato T, Kato Y, Sera M, Ikegami Y, Akasofu SI, Hayashi K, Oguti T, Kiyama Y

JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY 48 巻 ( 11 ) 頁： 1407 - 1419 1996年

Modelling formation of new radiation belts and response to ULF oscillations following March 24, 1991 SSC 査読有り

MK Hudson, AD Kotelnikov, Li, X, JG Lyon, Roth, I, M Temerin, Wygant, JR, JB Blake, MS Gussenhoven, K Yumoto, K Shiokawa

WORKSHOP ON THE EARTH'S TRAPPED PARTICLE ENVIRONMENT ( 383 ) 頁： 119 - 127 1996年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：AIP PRESS

The rapid formation of a new proton radiation belt at L similar or equal to 2.5 following the March 24, 1991 Storm Sudden Commencement (SSC) observed at the CRRES satellite is modelled using a relativistic guiding center test particle code. The new radiation belt formed on a time scale shorter than the drift period of eg. 20 MeV protons. The SSC is modelled by a bipolar electric field and associated compression and relaxation in the magnetic field, superimposed on a background dipole magnetic field. The source population consists of solar protons that populated the outer magnetosphere during the solar proton event that preceeded the SSC and trapped inner zone protons. The simulations show that both populations contribute to drift echoes in the 20-80 MeV range measured by the Aerospace instrument and in lower energy channels of the Protel instrument on CRRES, while primary contribution to the newly trapped population is from solar protons. Proton acceleration by the SSC differs from electron acceleration in two notable ways: different source populations contribute and nonrelativistic conservation of the first adiabatic invariant leads to greater energization of protons for a given decrease in L than for relativistic electrons. Model drift echoes, energy spectra and flux distribution in L at the time of injection compare well with CRRES observations. On the outbound pass, similar to 2 hours after the SSC, the broad spectral peak of the new radiation belt extends to higher energies (20 - 40 MeV) than immediately after formation. Electron flux oscillations observed at this later time are attributed to post-SSC impulses evident in ground magnetograms, while two minute period ULF oscillations also evident in CRRES field data appear to be cavity modes in the inner magnetosphere.

Web of Science

North/south asymmetry of sc/si magnetic variations observed along the 210 degrees magnetic meridian 査読有り

Yumoto K, Matsuoka H, Osaki H, Shiokawa K, Tanaka Y, Kitamura TI, Tachihara H, Shinohara M, Solovyev SI, Makarov GA, Vershinin EF, Buzevich AV, Manurung SL, Sobari O, Ruhimat M, Sukmadradjat, Morris RJ, Fraser BJ, Menk FW, Lynn KJW, Cole DG, Kennewell JA, Olson JV, Akasofu SI

JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY 48 巻 ( 11 ) 頁： 1333 - 1340 1996年

A STATISTICAL STUDY OF THE MOTIONS OF AURORAL ARCS IN THE HIGH-LATITUDE MORNING SECTOR 査読有り

SHIOKAWA K, YUMOTO K, HAYASHI K, OGUTI T, MCEWEN DJ

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 100 巻 ( A11 ) 頁： 21979 - 21985 1995年11月

A low-latitude aurora observed at Rikubetsu (L=1.6) during the magnetic storm of September 13,1993 査読有り

Shiokawa Kazuo, Yumoto Kiyohumi, Tanaka Yoshihito, Kiyama Yoshitaka, Kamide Yohsuke, Tokumaru Munetoshi

Proceedings of the NIPR Symposium on Upper Atmosphere Physics 8 巻頁： 17 - 23 1995年5月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：国立極地研究所

A low-latitude aurora was observed at Rikubetsu (L=1.6), Japan during the main phase of the moderate magnetic storm of September 13,1993. Although the sky at Rikubetsu was covered by thick clouds on this day, the aurora was identified as a significant enhancement in the 6300-A emission. It is likely that this aurora occurred in association with the expansion onset of an intense magnetospheric substorm, lasting approximately 1 hour. A notable point is that this aurora was observed during the moderate magnetic storm, indicating that low-latitude auroras are not always associated with intense magnetic storms. It is argued that the so-called Stable Auroral Red (SAR) arc and the substorm-associated low-latitude aurora should be distinguished in their production mechanisms, since the latter aurora must be accounted for in terms of substorm processes.

CiNii Research

THE MECHANISMS OF DAMPING OF GEOMAGNETIC-PULSATIONS 査読有り

YUMOTO K, PILIPENKO V, FEDOROV E, KURNEVA N, SHIOKAWA K

JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY 47 巻 ( 2 ) 頁： 163-176 1995年

MAGNETIC-FIELD STRUCTURES OF THE MAGNETOTAIL AS OBSERVED BY GEOTAIL 査読有り

YAMAMOTO T, SHIOKAWA K, KOKUBUN S

GEOPHYSICAL RESEARCH LETTERS 21 巻 ( 25 ) 頁： 2875-2878 1994年12月

GEOTAIL OBSERVATION OF MAGNETOSONIC PC-3 WAVES IN THE DAYSIDE MAGNETOSPHERE 査読有り

TAKAHASHI K, KOKUBUN S, MATSUOKA H, SHIOKAWA K, YUMOTO K, NAKAMURA M, KAWANO H, YAMAMOTO T, MATSUOKA A, TSURUDA K, HAYAKAWA H, KOJIMA H, MATSUMOTO H

GEOPHYSICAL RESEARCH LETTERS 21 巻 ( 25 ) 頁： 2899 - 2902 1994年12月

A FLUX ROPE FOLLOWED BY RECURRING ENCOUNTERS WITH TRAVELING COMPRESSION REGIONS - GEOTAIL OBSERVATIONS 査読有り

KAWANO H, YAMAMOTO T, KOKUBUN S, TSURUDA K, LUI ATY, WILLIAMS DJ, YUMOTO K, HAYAKAWA H, NAKAMURA M, OKADA T, MATSUOKA A, SHIOKAWA K, NISHIDA A

GEOPHYSICAL RESEARCH LETTERS 21 巻 ( 25 ) 頁： 2891 - 2894 1994年12月

CHARACTERISTICS OF MAGNETIC VARIATIONS CAUSED BY LOW-LATITUDE AURORAE OBSERVED AROUND 210-DEGREES MAGNETIC MERIDIAN 査読有り

YUMOTO K, SHIOKAWA K, ENDO T, TANAKA Y, OGUTI T, MENK FW

JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY 46 巻 ( 3 ) 頁： 213-229 1994年

LOW-LATITUDE AURORAS OBSERVED AT MOSHIRI AND RIKUBETSU (L=1.6) DURING MAGNETIC STORMS ON FEBRUARY 26, 27, 29, AND MAY 10, 1992 査読有り

SHIOKAWA K, YUMOTO K, TANAKA Y, OGUTI T, KIYAMA Y

JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY 46 巻 ( 3 ) 頁： 231-252 1994年

Ionospheric current and magnetic variations caused by low-latitude aurorae 査読有り

Yumoto K, Endo T, Shiokawa K, Tanaka Y

LOW-LATITUDE IONOSPHERIC PHYSICS 7 巻頁： 241-250 1994年

GLOBAL CAVITY MODE-LIKE AND LOCALIZED FIELD-LINE PC 3-4 OSCILLATIONS STIMULATED BY INTERPLANETARY IMPULSES (SI/SC) - INITIAL RESULTS FROM THE 210-DEGREES MM MAGNETIC OBSERVATIONS 査読有り

YUMOTO K, ISONO A, SHIOKAWA K, MATSUOKA H, TANAKA Y, MENK FW, FRASER BJ

SOLAR WIND SOURCES OF MAGNETOSPHERIC ULTRA-LOW-FREQUENCY WAVES 81 巻頁： 335-344 1994年

CORRELATION OF HIGH-LATITUDE AND LOW-LATITUDE PI-2 MAGNETIC PULSATIONS OBSERVED AT 210-DEGREES MAGNETIC MERIDIAN CHAIN STATIONS 査読有り

YUMOTO K, OSAKI H, FUKAO K, SHIOKAWA K, TANAKA Y, SOLOVYEV SI, KRYMSKIJ G, VERSHININ EF, OSININ VF

JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY 46 巻 ( 11 ) 頁： 925 - 935 1994年

THE GEOTAIL MAGNETIC-FIELD EXPERIMENT 査読有り

KOKUBUN S, YAMAMOTO T, ACUNA MH, HAYASHI K, SHIOKAWA K, KAWANO H

JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY 46 巻 ( 1 ) 頁： 7 - 21 1994年

GLOBAL CHARACTERISTICS OF PARTICLE-PRECIPITATION AND FIELD-ALIGNED ELECTRON ACCELERATION DURING ISOLATED SUBSTORMS 査読有り

SHIOKAWA K, YUMOTO K

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 98 巻 ( A2 ) 頁： 1359 - 1375 1993年2月

GLOBALLY COORDINATED MAGNETIC OBSERVATIONS ALONG 210-DEGREES MAGNETIC MERIDIAN DURING STEP PERIOD .1. PRELIMINARY-RESULTS OF LOW-LATITUDE PC 3S 査読有り

YUMOTO K, TANAKA Y, OGUTI T, SHIOKAWA K, YOSHIMURA Y, ISONO A, FRASER BJ, MENK FW, LYNN JW, SETO M

JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY 44 巻 ( 4 ) 頁： 261 - 276 1992年

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