Auroral dynamics in the polar cap region
スポンサーリンク
概要
- 論文の詳細を見る
The characteristics of extremely high latitude auroras are examined by using Greenland auroral data. In this paper, two different auroras obtained in the dayside and the morning sector are mainly analyzed; (1) polar arc : this aurora is observed during quiet conditions and is related to less than 100eV precipitating electrons, and (2) polar corona : this aurora is observed during disturbed conditions and is related to a few hundred eV electrons. These two auroras may have different sources; the polar arc corresponds to the plasma mantle or low latitude boundary layer and the polar corona corresponds to the low latitude boundary layer or boundary plasma sheet. The relationships of IMF fluctuations are also examined and found that auroral enhancement and/or movement are seen in association with southward turning of the IMF.
- 国立極地研究所の論文
著者
-
Sakanoi Takeshi
Tohoku University
-
Yamagishi Hisao
National Institude of Polar Research
-
Ayukawa Masaru
National Institute of Polar Research
-
Ejiri Masaki
National Institute of Polar Research
-
Makita Kazuo
Takushoku University
-
Makita K
Basic Education Series Physics Takushoku University
-
Yamagishi Hisao
National Institute Of Polar Research
関連論文
- AN OVERVIEW AND LESSONS-LEARNED OF SMALL SCIENTIFIC SATELLITE "INDEX"(REIMEI)(WSANE2007)
- VHF data transmission experiments using MBC equipment conducted during the period from JARE-43 to JARE-45
- Meteor Burst Communications in Antarctica : Description of Experiments and First Results(Terrestrial Radio Communications)
- Characteristics of CNA associated with geomagnetic sudden commencements
- Geomagnetic sudden commencements observed at the Syowa-Iceland conjugate stations
- Characteristics of polarization of geomagnetic sudden commencements observed at Syowa Station
- High energy electron observation by Polar Patrol Balloon flight in Antarctica
- Measurement of cosmic-ray protons during Polar Patrol Balloon experiment in Antarctica
- Balloon observations of auroral X-rays at Esrange, Sweden and related phenomena
- Auroral zone X-ray pulsations associated with VLF pulsations: B15-3N balloon experiment
- Polar Patrol Balloon experiment in Antarctica during 2002-2003
- Observations of hard X-rays of auroral origin with Polar Patrol Balloons No. 8 and 10
- Experiments on meteor burst communications in the Antarctic
- MHD wave characteristics inferred from correlations between X-rays, VLF, and ULFs at Syowa Station, Antarctica and Tjornes, Iceland (L-6)
- Correlations between X-rays, VLF emissions and magnetic pulsations observed at Syowa-Tjornes conjugate-pair stations near L 〜 6 (extended abstract)
- Balloon measurement of electric fields near the Harang discontinuity
- X-ray intensity, ozone density, and VLF wave intensity observed by scientific balloon experiments at Esrange
- ULF waves and magnetic field characteristics in the polar cusp observed at Godhavn
- Characteristics of polar mesosphere summer echoes observed with oblique incidence HF radars at Syowa Station
- E region echoes observed with the Syowa HF radar under disturbed geomagnetic conditions
- Implications of statistics of near-range Doppler velocity observed with the Syowa East HF radar
- Statistical study of Doppler velocity and echo power around 75゜ magnetic latitude using data obtained with the Syowa East HF radar in 1997
- Simultaneous quasi-periodic optical and HF radar signatures observed in the postnoon sector
- Statistical analysis of echo power, Doppler velocity and spectral width obtained with the Syowa South HF radar
- Polar cap patches and auroral blobs observed with Antarctic HF radars: Preliminary results
- Averaged pattern of ionospheric echo region and convection: Initial results from the Syowa Station HF radar
- HF radar experiment at Syowa Station for the study of high-latitude ionosphere-2: A capability (extended abstract)
- Simultaneous observation of radar aurora and visible aurora over Mizuno Station
- Spatial Characteristics of Bremsstrahlung X-Rays Associated with VLF Emissions
- Auroral X-ray images observed by B15-3 balloon over Syowa Station, Antarctica
- Measurement of Auroral Electric Fields with an Antarctic Sounding Rocket S-310JA-7. 1.DC Electric Field
- Simultaneous Observations of Aurora with a Doppler-Radar and Sounding Rockets
- Measurement of Auroral Electric Fields with an Antarctic Sounding Rocket S-310JA-7. 2.AC Electric Field
- Localization of VLF ionospheric exit point by comparison of multipoint ground-based observation with full-wave analysis
- Unmanned Magnetometer Network Observation in the 44th Japanese Antarctic Research Expedition: Initial Results and an Event Study on Auroral Substorm Evolution
- Cusp-latitude conjugate ionospheric absorption associated with increase of solar wind dynamic pressure during strong northward IMF-a case study
- A new method for monitoring and removing SuperDARN radar DC offsets
- New sounding modes for SuperDARN HF radars
- Conjugate features of daytime absorption associated with specific changes in the solar wind observed by inter-hemispheric high-latitude imaging riometers
- Interhemispheric conjugacy of auroral poleward expansion observed by conjugate imaging riometers at 67゜ and 75゜- 77゜ invariant latitude
- Electrostatic Plasma Instabilities in Highly Active Aurora Observed by a Sounding Rocket S-310JA-7
- Observations Results of Electron Density Profile by S-310JA-7 Rocket
- Geomagnetic Field Observation Using Fluxgate Magnetometer System Onboard Balloons in Antarctica
- Postnoon aurora observed at Zhongshan Station, Antarctica - A case study -
- UPPER ATMOSPHERE PHYSICS DATA OBTAINED AT SYOWA STATION IN 1996
- Upper atmosphere physics data obtained at Syowa Station in 1996 (Upper Atmosphere Physics 16)
- High resolution auroral absorption measurement with scanning-beam riometer at L=6.1
- MF radar observations of antarctic mesosphere and lower thermosphere
- Fast equatorward separatrix motion in the nightside ionosphere just prior to substorm onsets (extended abstract)
- Localized bursty plasma flow in the nightside ionosphere ─Implication for distant tail reconnection (extended abstract)
- Comparative Study of Magnetic Pc1 Pulsations between Low Latitudes and High Latitudes: Statistical Study
- CLASSIFICATION OF Pc 1 AND Pi 1 WAVES OBSERVED IN HIGH LATITUDES
- Height variations of auroral hiss observed by S-310JA-11 and 12 rockets
- Full wave calculation for a Gaussian VLF wave injection into the ionospherer
- Conjugate imaging riometer observation at polar cusp/cap stations: A daytime absorption event for a specific change of solar wind conditions (scientific paper)
- Initial results of imaging riometer observations at polar cap conjugate stations
- Polar cleft structure and SEC associated plasma irregularities observed by Greenland rocket experiment, 1976
- Comparative analysis of electron density and electric field fluctuations in highly active auroras observed by a sounding rocket S-310JA-12: Preliminary results
- Attitude determination of the Antarctic sounding rockets S-310JA-11 and -12
- Measurement of auroral magnetic field with the Antarctic sounding rocket S-310JA-12
- Conjugate observation of periodic VLF emissions near L=6
- ULF-VLF WAVES OBSERVED AT THE SYOWA STATION-ICELAND CONJUGATE PAIR
- Polar cusp, plasma mantle particles and their relationships to polar rain
- INSTALLATION OF GEOMAGNETIC ABSOLUTE OBSERVATION POINT AT SEAL ROCK, EAST ANTARCTICA, AND THE ABSOLUTE OBSERVATIONS IN 1987
- Installation of geomagnetic absolute observation point at Seal Rock, East Antarctica and the absolute observations in 1987
- UPPER ATMOSPHERE PHYSICS DATA, SYOWA AND ASUKA STATIONS, 1987
- Upper atmosphere physics data, Syowa and Asuka Stations, 1987(Upper Atmosphere Physics 7)
- Morphology of pre-noon and post-noon auroras
- Comparison between prenoon and postnoon auroras during quiet and disturbed conditions (extended abstract)
- Auroral dynamics in the polar cap region
- CNA pulsations associated with geomagnetic sudden commencements
- Measurements of the Directions of Propagation Vector and Poynting Flux of Auroral Hiss by Means of the S-310JA-5 Rocket
- The Results of Auroral Sounding with S-310JA-4 Rocket: Electric Field, Particle and Waves
- Synthetic Observations of High-Latitude Ionosphere by S-310JA-4 Sounding Rocket
- SUBSTORMS DURING THE IMS PERIOD OBSERVED BY SOUNDING ROCKETS
- ISIS-I and ISIS-II observation of emissions triggered by doppler-shifted Norway Omega signals
- Statistical feature of non-ducted Omega signal and associated ASE observed by ISIS-I and -II satellites
- Rocket observations of modulations of the low energy electron flux in the auroral ionosphere
- Rocket Measurement of Auroral keV Electron Fluxes in Antarctica
- keV Electron Microbursts above Auroral Arcs
- High latitude aurora observed at Godhavn
- Time-sharing measurements of ionospheric electron temperature and electron density with the electric field using double probes: An experiment on the Antarctic sounding rocket S-310JA-7
- UPPER ATMOSPHERE PHYSICS DATA, SYOWA STATION, 1986
- Upper atmosphere physics data, Syowa Station, 1986(Upper Atmosphere Physics 6)
- UPPER ATMOSPHERE PHYSICS DATA, SYOWA STATION, 1985
- Upper atmosphere physics data, Syowa Station, 1985(Upper Atmosphere Physics 5)
- Initial observation results with imaging riometer at Ny-Alesund (L=16)
- Latitudinal features of cosmic noise absorption at the time of SSC-triggered substorm as observed with scanning beam riometer
- Drift of auroral absorption observed in February 1986 with the scanning beam riometer at Syowa Station
- Near-realtime data collection from Syowa Station and its utilizationfor space weather forecast (extended abstract)
- New auroral spectrometer using an acousto-optic tunable filter
- Observation of electron density in the auroral ionosphere-Results of the Antarctic rockets S-310JA-11 and -12
- Observations of Electron Density in the Polar Ionosphere Using the Swept Frequency Impedance Probe
- Upper Atomosphere Physics Data Obtained at Syowa Station in 2005
- ELF Emissions in High Latitudes-Ray Path Calculation and Ground-Satellite Observations
- A rectified response of daytime radio wave absorption to southward and northward excursions during northward interplanetary magnetic field: A case study
- Correlation analysis of electric field and electron density fluctuations observed by a sounding rocket S-310JA-7
- Rocket Measurements of Auroral-Zone Energetic Electrons at Syowa Station, Antarctica. II. Characteristics of Electrons under Active Auroral Conditions
- A modulation of Pc 3 amplitude and associated auroral precipitation (extended abstract)
- A 6.7-s quasi-periodic fluctuation of auroral X-rays observed at rocket altitudes