Magnetospheric Conditions for STEVE and SAID: Particle Injection, Substorm Surge, and Field-Aligned Currents

被引:16
作者
Nishimura, Y. [1 ,2 ]
Yang, J. [3 ]
Weygand, J. M. [4 ]
Wang, W. [3 ,5 ]
Kosar, B. [6 ]
Donovan, E. F. [7 ]
Angelopoulos, V. [4 ]
Paxton, L. J. [8 ]
Nishitani, N. [9 ]
机构
[1] Boston Univ, Dept Elect & Comp Engn, Boston, MA 02215 USA
[2] Boston Univ, Ctr Space Phys, Boston, MA 02215 USA
[3] Southern Univ Sci & Technol, Dept Earth & Space Sci, Shenzhen, Peoples R China
[4] Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA
[5] Sun Yat Sen Univ, Sch Atmospher Sci, Zhuhai, Peoples R China
[6] Catholic Univ Korea, Dept Phys, Washington, DC USA
[7] Univ Calgary, Dept Phys & Astron, Calgary, AB, Canada
[8] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA
[9] Nagoya Univ, Inst Space Earth Environm Res, Nagoya, Aichi, Japan
基金
美国国家科学基金会;
关键词
STEVE; SAPS; SAID; THEMIS; all-sky imager (ASI); field-aligned current (FAC); injection; SUBAURORAL ION DRIFTS; CONVECTION; AURORA;
D O I
10.1029/2020JA027782
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
To understand magnetosphere-ionosphere conditions that result in thermal emission velocity enhancement (STEVE) and subauroral ion drifts (SAID) during the substorm recovery phase, we present substorm aurora, particle injection, and current systems during two STEVE events. Those events are compared to substorm events with similar strength but without STEVE. We found that the substorm surge and intense upward currents for the events with STEVE reach the dusk, while those for the non-STEVE substorms are localized around midnight. The Time History of Events and Macroscale Interactions during Substorms (THEMIS) satellite observations show that location of particle injection and fast plasma sheet flows for the STEVE events also shifts duskward. Electron injection is stronger and ion injection is weaker for the STEVE events compared to the non-STEVE events. SAID are measured by Super Dual Auroral Radar Network during the STEVE events, but the non-STEVE events only showed latitudinally wide subauroral polarization streams without SAID. To interpret the observations, Rice Convection Model (RCM) simulations with injection at premidnight and midnight have been conducted. The simulations successfully explain the stronger electron injection, weaker ion injection, and formation of SAID for injection at premidnight, because injected electrons reach the premidnight inner magnetosphere and form a narrower separation between the ion and electron inner boundaries. We suggest that substorms and particle injections extending far duskward away from midnight offer a condition for creating STEVE and SAID due to stronger electron injection to premidnight. The THEMIS all-sky imager network identified the east-west length of the STEVE arc to be similar to 1900 km (similar to 2.5 h magnetic local time) and the duration to be 1-1.5 h.
引用
收藏
页数:13
相关论文
共 33 条
  • [1] Temporal and Spatial Development of Global Birkeland Currents
    Anderson, Brian J.
    Olson, Cameron N.
    Korth, Haje
    Barnes, Robin J.
    Waters, Colin L.
    Vines, Sarah K.
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2018, 123 (06) : 4785 - 4808
  • [2] A PROPOSED PRODUCTION-MODEL OF RAPID SUBAURORAL ION DRIFTS AND THEIR RELATIONSHIP TO SUBSTORM EVOLUTION
    ANDERSON, PC
    HANSON, WB
    HEELIS, RA
    CRAVEN, JD
    BAKER, DN
    FRANK, LA
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1993, 98 (A4) : 6069 - 6078
  • [3] Multisatellite observations of rapid subauroral ion drifts (SAID)
    Anderson, PC
    Carpenter, DL
    Tsuruda, K
    Mukai, T
    Rich, FJ
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2001, 106 (A12) : 29585 - 29599
  • [4] The Space Physics Environment Data Analysis System (SPEDAS)
    Angelopoulos, V.
    Cruce, P.
    Drozdov, A.
    Grimes, E. W.
    Hatzigeorgiu, N.
    King, D. A.
    Larson, D.
    Lewis, J. W.
    McTiernan, J. M.
    Roberts, D. A.
    Russell, C. L.
    Hori, T.
    Kasahara, Y.
    Kumamoto, A.
    Matsuoka, A.
    Miyashita, Y.
    Miyoshi, Y.
    Shinohara, I.
    Teramoto, M.
    Faden, J. B.
    Halford, A. J.
    McCarthy, M.
    Millan, R. M.
    Sample, J. G.
    Smith, D. M.
    Woodger, L. A.
    Masson, A.
    Narock, A. A.
    Asamura, K.
    Chang, T. F.
    Chiang, C. -Y.
    Kazama, Y.
    Keika, K.
    Matsuda, S.
    Segawa, T.
    Seki, K.
    Shoji, M.
    Tam, S. W. Y.
    Umemura, N.
    Wang, B. -J.
    Wang, S. -Y.
    Redmon, R.
    Rodriguez, J. V.
    Singer, H. J.
    Vandegriff, J.
    Abe, S.
    Nose, M.
    Shinbori, A.
    Tanaka, Y. -M.
    UeNo, S.
    [J]. SPACE SCIENCE REVIEWS, 2019, 215 (01)
  • [5] Steve: The Optical Signature of Intense Subauroral Ion Drifts
    Archer, W. E.
    Gallardo-Lacourt, B.
    Perry, G. W.
    St-Maurice, J. P.
    Buchert, S. C.
    Donovan, E.
    [J]. GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (12) : 6279 - 6286
  • [6] Dynamics of ring current and electric fields in the inner magnetosphere during disturbed periods: CRCM-BATS-R-US coupled model
    Buzulukova, N.
    Fok, M. -C.
    Pulkkinen, A.
    Kuznetsova, M.
    Moore, T. E.
    Glocer, A.
    Brandt, P. C.
    Toth, G.
    Rastaetter, L.
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2010, 115
  • [7] Simulations of storm time diffuse aurora with plasmasheet electrons in strong pitch angle diffusion
    Chen, MW
    Schulz, M
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2001, 106 (A2) : 1873 - 1886
  • [8] Subauroral Neutral Wind Driving and Its Feedback to SAPS During the 17 March 2013 Geomagnetic Storm
    Ferdousi, Banafsheh
    Nishimura, Yukitoshi
    Maruyama, Naomi
    Lyons, Larry R.
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2019, 124 (03) : 2323 - 2337
  • [9] Foster J.C., 2002, EOS, V83, P393, DOI [10.1029/2002EO000289, 10.1029/2002EO000289., DOI 10.1029/2002E0000289, DOI 10.1029/2002EO000289]
  • [10] A Statistical Analysis of STEVE
    Gallardo-Lacourt, Bea
    Nishimura, Y.
    Donovan, E.
    Gillies, D. M.
    Perry, G. W.
    Archer, W. E.
    Nava, O. A.
    Spanswick, E. L.
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2018, 123 (11) : 9893 - 9905