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Advances in Auroral Plasma Physics

Journal of Geophysical Research, vol. 117, no. A1, 2012

How to Cite
Guest Editor(s): R. Pottelette, G. Marklund
Description: The auroral regions are regions where a significant fraction of the energy fed in by the solar wind to the magnetosphere is dissipated. Recent multispacecraft and multirocket missions are providing new results concerning auroral particle acceleration processes thanks to both high time and space resolution. We welcome papers that highlight the spatiotemporal features of the aurora and the relation between quasi-static and Alfvénic acceleration, as well as correlative studies from ground-based instrumentation. We also solicit contributions that demonstrate the connection between auroral acceleration and magnetotail reconnection. Manuscripts dealing with numerical simulations that emphasize the generation of small-scale turbulence are also appropriate.

Laboratory studies of UV emissions from proton impact on N2: The Lyman-Birge-Hopfield band system for aurora analysis,

Ajello, J. M., R. S. Mangina, D. J. Strickland, and D. Dziczek (2011),

J. Geophys. Res., 116, A00K03, doi:10.1029/2010JA016103
[printed 117(A1), 2012]

Publication Date: 19 April 2011

21 pages, 8 figures, 2 tables

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Key Points

  • First lab measurement of proton impact cross section of N2 LBH band system
  • We have measured emission cross section of NI lines from protons, H2+ & H3+
  • Describe a new state of the art crossed-beams apparatus

Particle-in-cell simulation of incoherent scatter radar spectral distortions related to beam-plasma interactions in the auroral ionosphere,

Diaz, M. A., M. Oppenheim, J. L. Semeter, and M. Zettergren (2011),

J. Geophys. Res., 116, A00K10, doi:10.1029/2010JA016096
[printed 117(A1), 2012]

Publication Date: 28 July 2011

14 pages, 14 figures, 5 tables

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Key Points

  • Langmuir decay process is a feasible explanation to ion acoustic enhancements
  • Langmuir harmonics may be detectable with current ISRs
  • Langmuir harmonics may be useful to discriminate between explanations of NEIALs

Six auroral generators: A review,

Haerendel, G. (2011),

J. Geophys. Res., 116, A00K05, doi:10.1029/2010JA016425
[printed 117(A1), 2012]

Publication Date: 3 June 2011

12 pages, 9 figures, 1 table

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Key Points

  • Identification of auroral current generators
  • Identification of driving forces
  • Quantify generator-arc relations

Energy conversion regions as observed by Cluster in the plasma sheet,

Hamrin, M., O. Marghitu, P. Norqvist, S. Buchert, M. André, B. Klecker, L. M. Kistler, and I. Dandouras (2011),

J. Geophys. Res., 116, A00K08, doi:10.1029/2010JA016383
[printed 117(A1), 2012]

Publication Date: 21 July 2011

18 pages, 10 figures, 1 table

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Key Points

  • First in situ observations of the average load behavior of the plasma sheet
  • Cluster PS energy conversion observations are consistent with MHD simulations
  • ECRs and BBFs are likely to be related, although details need to be explored

Anomalous transport effects on the parallel E field in downward auroral current regions of the Earth's magnetosphere,

Jasperse, J. R., B. Basu, E. J. Lund, and N. Grossbard (2011),

J. Geophys. Res., 116, A00K11, doi:10.1029/2010JA016314
[printed 117(A1), 2012]

Publication Date: 20 August 2011

18 pages, 7 figures

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Key Points

  • Physical processes that determine the electric field
  • EBDIC produces the turbulence
  • New nonlinear formula for current-voltage relationship

Turbulent microstructures and formation of folds in auroral breakup arc,

Kataoka, R., Y. Miyoshi, T. Sakanoi, A. Yaegashi, K. Shiokawa, and Y. Ebihara (2011),

J. Geophys. Res., 116, A00K02, doi:10.1029/2010JA016334
[printed 117(A1), 2012]

Publication Date: 19 April 2011

7 pages, 5 figures

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Key Points

  • First ground-based high-speed EMCCD imaging of breakup arc
  • Periodic folds showed exponential growth just before an auroral breakup onset
  • Self-organization of nonlinear inertial Alfven wave turbulence may be important

Development of parallel electric fields at the plasma sheet boundary layer,

Lysak, R. L., and Y. Song (2011),

J. Geophys. Res., 116, A00K14, doi:10.1029/2010JA016424
[printed 117(A1), 2012]

Publication Date: 9 September 2011

14 pages, 10 figures, 2 animations

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Key Points

  • Phase mixing at gradients leads to small spatial scales
  • Landau damping at PSBL can accelerate auroral particles
  • Alfvenic aurora should be common at PSBL

On the divergence of the auroral electrojets,

Marghitu, O., C. Bunescu, T. Karlsson, B. Klecker, and H. C. Stenbaek-Nielsen (2011),

J. Geophys. Res., 116, A00K17, doi:10.1029/2011JA016789
[printed 117(A1), 2012]

Publication Date: 4 November 2011

14 pages, 7 figures

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Key Points

  • Derivation of electrojet divergence from satellite data by updated ALADYN method
  • Field-aligned current coupling to electrojet for Boström Type 2 configuration
  • Ionospheric current closure and Cowling mechanism during substorm cycle

Kinetic simulations of magnetic reconnection in presence of a background O+ population,

Markidis, S., G. Lapenta, L. Bettarini, M. Goldman, D. Newman, and L. Andersson (2011),

J. Geophys. Res., 116, A00K16, doi:10.1029/2011JA016429
[printed 117(A1), 2012]

Publication Date: 28 September 2011

13 pages, 18 figures

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Key Points

  • Particle-in-Cell simulation of O+ magnetic reconnection with physical mass ratios
  • The reconnection rate does not scale with the Alfven velocity
  • Separation of O+ and H+ ions in the outflow region

Evolution in space and time of the quasi-static acceleration potential of inverted-V aurora and its interaction with Alfvénic boundary processes,

Marklund, G. T., S. Sadeghi, J. A. Cumnock, T. Karlsson, P.-A. Lindqvist, H. Nilsson, A. Masson, A. Fazakerley, E. Lucek, J. Pickett, and Y. Zhang (2011),

J. Geophys. Res., 116, A00K13, doi:10.1029/2011JA016537
[printed 117(A1), 2012]

Publication Date: 3 September 2011

10 pages, 7 figures

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Key Points

  • The evolution of auroral acceleration potentials in space and time
  • The interaction between quasi-static and Alfvénic acceleration

Sounding rocket study of two sequential auroral poleward boundary intensifications,

Mella, M. R., K. A. Lynch, D. L. Hampton, H. Dahlgren, P. M. Kintner, M. Lessard, D. Lummerzheim, E. T. Lundberg, M. J. Nicolls, and H. C. Stenbaek-Nielsen (2011),

J. Geophys. Res., 116, A00K18, doi:10.1029/2011JA016428
[printed 117(A1), 2012]

Publication Date: 7 December 2011

15 pages, 13 figures

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Key Points

  • Auroral nightside sounding rocket is a case study of a PBI sequence
  • Comparing rocket, ground camera, and THEMIS data shows evolution of a PBI
  • This observation shows aurora acceleration mechanisms are not always separated

Electron acceleration by an Alfvénic pulse propagating in an auroral plasma cavity,

Mottez, F., and V. Génot (2011),

J. Geophys. Res., 116, A00K15, doi:10.1029/2010JA016367
[printed 117(A1), 2012]

Publication Date: 10 September 2011

11 pages, 12 figures, 1 table

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Key Points

  • Auroral electrons are accelerated by an Alfvenic pulse upon a plasma cavity
  • This is a source of electron kinetic energy flux, favourable to auroral display
  • A numerical test shows that the process is caused by electron inertial effects

Fine-scale dynamics of black auroras obtained from simultaneous imaging and particle observations with the Reimei satellite,

Obuchi, Y., T. Sakanoi, K. Asamura, A. Yamazaki, Y. Kasaba, M. Hirahara, Y. Ebihara, and S. Okano (2011),

J. Geophys. Res., 116, A00K07, doi:10.1029/2010JA016321
[printed 117(A1), 2012]

Publication Date: 13 July 2011

10 pages, 6 figures, 1 table

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Key Points

  • This article is the first result of black aurora obtained by Reimei
  • Unique results of black aurora study are shown
  • High temporal and spatial resolution by Reimei

Variance of the vertical ion speed measured with the European Incoherent Scatter (EISCAT) UHF radar in the polar lower ionosphere at Tromsø, Norway,

Oyama, S., A. Brekke, T. T. Tsuda, J. Kurihara, and B. J. Watkins (2011),

J. Geophys. Res., 116, A00K06, doi:10.1029/2010JA016129
[printed 117(A1), 2012]

Publication Date: 1 July 2011

16 pages, 14 figures, 1 table

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Key Points

  • Effects of fluctuating electric field on the polar ionospheric motion
  • Variance of the vertical ion speed in the lower ionosphere

Small-scale filamentary structures recorded in the auroral regions connected to the plasma sheet boundary layer,

Pottelette, R. (2011),

J. Geophys. Res., 116, A00K12, doi:10.1029/2010JA016192
[printed 117(A1), 2012]

Publication Date: 27 August 2011

8 pages, 6 figures

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Key Points

  • Characterization of reconnection processes
  • Hall currents closure by field-aligned currents
  • Nonlinear waves associated with reconnection

Spatiotemporal features of the auroral acceleration region as observed by Cluster,

Sadeghi, S., G. T. Marklund, T. Karlsson, P.-A. Lindqvist, H. Nilsson, O. Marghitu, A. Fazakerley, and E. A. Lucek (2011),

J. Geophys. Res., 116, A00K19, doi:10.1029/2011JA016505
[printed 117(A1), 2012]

Publication Date: 10 December 2011

11 pages, 8 figures, 1 table

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Key Points

  • Multi-spacecraft estimation of parallel electric field in AAR
  • Estimating the growth and decay times of potential structures
  • Measurement of altitude distribution of the electric potentials

Mesoscale PIC simulation of double layers and electron holes affecting parallel and transverse accelerations of electrons and ions,

Singh, N., S. Araveti, and E. B. Wells (2011),

J. Geophys. Res., 116, A00K09, doi:10.1029/2010JA016323
[printed 117(A1), 2012]

Publication Date: 28 July 2011

18 pages, 15 figures

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Key Points

  • Motion of double layers and electron holes
  • Transverse acceleration of electrons by electron holes
  • Thermal structure created by a double layer

Spatial-temporal characteristics of flickering aurora as seen by high-speed EMCCD imaging observations,

Yaegashi, A., T. Sakanoi, R. Kataoka, K. Asamura, Y. Miyoshi, M. Sato, and S. Okano (2011),

J. Geophys. Res., 116, A00K04, doi:10.1029/2010JA016333
[printed 117(A1), 2012]

Publication Date: 10 May 2011

12 pages, 7 figures, 1 table

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Key Points

  • We conducted high-speed EMCCD imaging observations of flickering aurora at 100 Hz
  • Significant fraction of the flickering events has very high frequency of >20 Hz
  • O+ EMIC waves cannot explain the high-frequency flickering events of >20 Hz

A numerical simulation for the omega band formation,

Yamamoto, T. (2011),

J. Geophys. Res., 116, A02207, doi:10.1029/2010JA015935

Publication Date: 9 February 2011

17 pages, 11 figures

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