Compound auroral micromorphology: ground-based high-speed imaging

被引:13
作者
Kataoka, Ryuho [1 ,2 ]
Fukuda, Yoko [3 ]
Miyoshi, Yoshizumi [4 ]
Miyahara, Hiroko [5 ]
Itoya, Satoru [6 ]
Ebihara, Yusuke [7 ]
Hampton, Donald [8 ]
Dahlgren, Hanna [9 ,10 ]
Whiter, Daniel [11 ]
Ivchenko, Nickolay [9 ]
机构
[1] Natl Inst Polar Res, Tachikawa, Tokyo 1908518, Japan
[2] Grad Univ Adv Studies SOKENDAI, Dept Polar Sci, Tachikawa, Tokyo 1908518, Japan
[3] Univ Tokyo, Dept Earth & Planetary Sci, Bunkyo Ku, Tokyo 1130003, Japan
[4] Nagoya Univ, Solar Terr Environm Lab, Chikusa Ku, Nagoya, Aichi 4648601, Japan
[5] Musashino Art Univ, Kodaira, Tokyo 1878505, Japan
[6] Japan Sci Fdn, Chiyoda Ku, Tokyo 1020091, Japan
[7] Kyoto Univ, Res Inst Sustainable Humanosphere, Uji, Kyoto 6110011, Japan
[8] Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA
[9] KTH Royal Inst Technol, Sch Elect Engn, S-10044 Stockholm, Sweden
[10] Univ Southampton, Sch Phys & Astron, Southampton, Hants, England
[11] Finnish Meteorol Inst, FIN-00101 Helsinki, Finland
来源
EARTH PLANETS AND SPACE | 2015年 / 67卷
关键词
Aurora; Magnetosphere-ionosphere coupling; Wave-particle interaction; ALIGNED ELECTRON FLUX; ION-CYCLOTRON WAVES; FLICKERING AURORA; PULSATING AURORA; SMALL-SCALE; ACCELERATION; ARC; DISPERSION; MORPHOLOGY; ENERGY;
D O I
10.1186/s40623-015-0190-6
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Auroral microphysics still remains partly unexplored. Cutting-edge ground-based optical observations using scientific complementary metal-oxide semiconductor (sCMOS) cameras recently enabled us to observe the fine-scale morphology of bright aurora at magnetic zenith for a variety of rapidly varying features for long uninterrupted periods. We report two interesting examples of combinations of fine-scale rapidly varying auroral features as observed by the sCMOS cameras installed at Poker Flat Research Range (PFRR), Alaska, in February 2014. The first example shows that flickering rays and pulsating modulation simultaneously appeared at the middle of a surge in the pre-midnight sector. The second example shows localized flickering aurora associated with growing eddies at the poleward edge of an arc in the midnight sector.
引用
收藏
页数:9
相关论文
共 40 条
  • [1] Sheared flows and small-scale Alfven wave generation in the auroral acceleration region
    Asamura, K.
    Chaston, C. C.
    Itoh, Y.
    Fujimoto, M.
    Sakanoi, T.
    Ebihara, Y.
    Yamazaki, A.
    Hirahara, M.
    Seki, K.
    Kasaba, Y.
    Okada, M.
    [J]. GEOPHYSICAL RESEARCH LETTERS, 2009, 36
  • [2] Small-scale auroral current sheet structuring
    Chaston, C. C.
    Seki, K.
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2010, 115
  • [3] Auroral electron dispersion below inverted-V energies: Resonant deceleration and acceleration by Alfven waves
    Chen, LJ
    Kletzing, CA
    Hu, SH
    Bounds, SR
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2005, 110 (A10)
  • [4] Using spectral characteristics to interpret auroral imaging in the 731.9 nm O+ line
    Dahlgren, H.
    Ivchenko, N.
    Lanchester, B. S.
    Sullivan, J.
    Whiter, D.
    Marklund, G.
    Stromme, A.
    [J]. ANNALES GEOPHYSICAE, 2008, 26 (07) : 1905 - 1917
  • [5] Morphology and dynamics of aurora at fine scale: first results from the ASK instrument
    Dahlgren, H.
    Ivchenko, N.
    Sullivan, J.
    Lanchester, B. S.
    Marklund, G.
    Whiter, D.
    [J]. ANNALES GEOPHYSICAE, 2008, 26 (05) : 1041 - 1048
  • [6] The optical manifestation of dispersive field-aligned bursts in auroral breakup arcs
    Dahlgren, H.
    Semeter, J. L.
    Marshall, R. A.
    Zettergren, M.
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2013, 118 (07) : 4572 - 4582
  • [7] Monoenergetic high-energy electron precipitation in thin auroral filaments
    Dahlgren, H.
    Ivchenko, N.
    Lanchester, B. S.
    [J]. GEOPHYSICAL RESEARCH LETTERS, 2012, 39
  • [8] Simultaneous observations of small multi-scale structures in an auroral arc
    Dahlgren, H.
    Aikio, A.
    Kaila, K.
    Ivchenko, N.
    Lanchester, B. S.
    Whiter, D. K.
    Marklund, G. T.
    [J]. JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, 2010, 72 (7-8) : 633 - 637
  • [9] Alfven wave interaction with inhomogeneous plasmas:: acceleration and energy cascade towards small-scales
    Génot, V
    Louarn, P
    Mottez, F
    [J]. ANNALES GEOPHYSICAE, 2004, 22 (06) : 2081 - 2096
  • [10] MAGNETOSPHERE-IONOSPHERE COUPLING
    GOERTZ, CK
    BOSWELL, RW
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1979, 84 (NA12): : 7239 - 7246