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Mukhopadhyay A, Welling D, Liemohn M, Ridley A, Burleigh M, Wu C, Zou S, Connor H, Vandegriff E, Dredger P, Tóth G. Global Driving of Auroral Precipitation: 1. Balance of Sources. JOURNAL OF GEOPHYSICAL RESEARCH. SPACE PHYSICS 2022; 127:e2022JA030323. [PMID: 36248015 PMCID: PMC9539890 DOI: 10.1029/2022ja030323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 06/06/2022] [Indexed: 06/16/2023]
Abstract
The accurate determination of auroral precipitation in global models has remained a daunting and rather inexplicable obstacle. Understanding the calculation and balance of multiple sources that constitute the aurora, and their eventual conversion into ionospheric electrical conductance, is critical for improved prediction of space weather events. In this study, we present a semi-physical global modeling approach that characterizes contributions by four types of precipitation-monoenergetic, broadband, electron, and ion diffuse-to ionospheric electrodynamics. The model uses a combination of adiabatic kinetic theory and loss parameters derived from historical energy flux patterns to estimate auroral precipitation from magnetohydrodynamic (MHD) quantities. It then converts them into ionospheric conductance that is used to compute the ionospheric feedback to the magnetosphere. The model has been employed to simulate the 5-7 April 2010 Galaxy15 space weather event. Comparison of auroral fluxes show good agreement with observational data sets like NOAA-DMSP and OVATION Prime. The study shows a dominant contribution by electron diffuse precipitation, accounting for ∼74% of the auroral energy flux. However, contributions by monoenergetic and broadband sources dominate during times of active upstream solar conditions, providing for up to 61% of the total hemispheric power. The study also finds a greater role played by broadband precipitation in ionospheric electrodynamics which accounts for ∼31% of the Pedersen conductance.
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Affiliation(s)
- Agnit Mukhopadhyay
- Climate and Space Sciences and Engineering DepartmentUniversity of MichiganAnn ArborMIUSA
- NASA Goddard Space Flight CenterGreenbeltMDUSA
- Department of PhysicsAmerican UniversityWashingtonDCUSA
| | - Daniel Welling
- Department of PhysicsUniversity of Texas at ArlingtonArlingtonTXUSA
| | - Michael Liemohn
- Climate and Space Sciences and Engineering DepartmentUniversity of MichiganAnn ArborMIUSA
| | - Aaron Ridley
- Climate and Space Sciences and Engineering DepartmentUniversity of MichiganAnn ArborMIUSA
| | | | - Chen Wu
- Climate and Space Sciences and Engineering DepartmentUniversity of MichiganAnn ArborMIUSA
| | - Shasha Zou
- Climate and Space Sciences and Engineering DepartmentUniversity of MichiganAnn ArborMIUSA
| | - Hyunju Connor
- NASA Goddard Space Flight CenterGreenbeltMDUSA
- Department of PhysicsUniversity of Alaska FairbanksFairbanksAKUSA
| | | | - Pauline Dredger
- Department of PhysicsUniversity of Texas at ArlingtonArlingtonTXUSA
| | - Gabor Tóth
- Climate and Space Sciences and Engineering DepartmentUniversity of MichiganAnn ArborMIUSA
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Hatch SM, LaBelle J, Chaston CC. Inferring Source Properties of Monoenergetic Electron Precipitation From Kappa and Maxwellian Moment-Voltage Relationships. JOURNAL OF GEOPHYSICAL RESEARCH. SPACE PHYSICS 2019; 124:1548-1567. [PMID: 31123664 PMCID: PMC6519048 DOI: 10.1029/2018ja026158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 12/18/2018] [Accepted: 01/09/2019] [Indexed: 06/09/2023]
Abstract
We present two case studies of FAST electrostatic analyzer measurements of both highly nonthermal ( κ ≲ 2.5) and weakly nonthermal/thermal monoenergetic electron precipitation at ∼4,000 km, from which we infer the properties of the magnetospheric source distributions via comparison of experimentally determined number density-, current density-, and energy flux-voltage relationships with corresponding theoretical relationships. We also discuss the properties of the two new theoretical number density-voltage relationships that we employ. Moment uncertainties, which are calculated analytically via application of the Gershman et al. (2015, https://doi.org/10.1002/2014JA020775) moment uncertainty framework, are used in Monte Carlo simulations to infer ranges of magnetospheric source population densities, temperatures, κ values, and altitudes. We identify the most likely ranges of source parameters by requiring that the range of κ values inferred from fitting experimental moment-voltage relationships correspond to the range of κ values inferred from directly fitting observed electron distributions with two-dimensional kappa distribution functions. Observations in the first case study, which are made over ∼78-79° invariant latitude in the Northern Hemisphere and 4.5-5.5 magnetic local time, are consistent with a magnetospheric source population density n m= 0.7-0.8 cm-3, source temperature T m≈ 70 eV, source altitude h= 6.4-7.7 R E, and κ= 2.2-2.8. Observations in the second case study, which are made over 76-79° invariant latitude in the Southern Hemisphere and ∼21 magnetic local time, are consistent with a magnetospheric source population density n m= 0.07-0.09 cm-3, source temperature T m≈ 95 eV, source altitude h ≳ 6 R E, and κ= 2-6.
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Affiliation(s)
- Spencer M. Hatch
- Birkeland Centre for Space Science, Department of Physics and TechnologyUniversity of BergenBergenNorway
| | - James LaBelle
- Department of Physics and AstronomyDartmouth CollegeHanoverNHUSA
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Auroral Particle Distribution Functions and Their Relationship to Inverted Vs and Auroral Arcs. ACTA ACUST UNITED AC 2013. [DOI: 10.1029/gm025p0091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Mizera PF, Fennell JF, Croley DR, Gorney DJ. Charged particle distributions and electric field measurements from S3-3. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/ja086ia09p07566] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Huang CY, Frank LA, Eastman TE. High-altitude observations of an intense inverted V event. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/ja089ia09p07423] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Kan J, Lee L, Akasofu SI. Two-dimensional potential double layers and discrete auroras. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/ja084ia08p04305] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Lyons L. Generation of large-scale regions of auroral currents, electric potentials, and precipitation by the divergence of the convection electric field. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/ja085ia01p00017] [Citation(s) in RCA: 332] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Belmont G, Fontaine D, Canu P. Are equatorial electron cyclotron waves responsible for diffuse auroral electron precipitation? ACTA ACUST UNITED AC 2012. [DOI: 10.1029/ja088ia11p09163] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Cornwall JM, Chiu YT. Ion distribution effects of turbulence on a kinetic auroral arc model. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/ja087ia03p01517] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Morioka A, Miyoshi Y, Kitamura N, Misawa H, Tsuchiya F, Menietti JD, Honary F. Fundamental characteristics of field-aligned auroral acceleration derived from AKR spectra. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/2011ja017137] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Marklund GT, Sadeghi S, Karlsson T, Lindqvist PA, Nilsson H, Forsyth C, Fazakerley A, Lucek EA, Pickett J. Altitude distribution of the auroral acceleration potential determined from cluster satellite data at different heights. PHYSICAL REVIEW LETTERS 2011; 106:055002. [PMID: 21405403 DOI: 10.1103/physrevlett.106.055002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2010] [Indexed: 05/30/2023]
Abstract
Aurora, commonly seen in the polar sky, is a ubiquitous phenomenon occurring on Earth and other solar system planets. The colorful emissions are caused by electron beams hitting the upper atmosphere, after being accelerated by quasistatic electric fields at 1-2 R(E) altitudes, or by wave electric fields. Although aurora was studied by many past satellite missions, Cluster is the first to explore the auroral acceleration region with multiprobes. Here, Cluster data are used to determine the acceleration potential above the aurora and to address its stability in space and time. The derived potential comprises two upper, broad U-shaped potentials and a narrower S-shaped potential below, and is stable on a 5 min time scale. The scale size of the electric field relative to that of the current is shown to depend strongly on altitude within the acceleration region. To reveal these features was possible only by combining data from the two satellites.
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Affiliation(s)
- Göran T Marklund
- Space and Plasma Physics, School of Electrical Engineering, KTH, SE 10044 Stockholm, Sweden
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Morioka A, Miyoshi Y, Miyashita Y, Kasaba Y, Misawa H, Tsuchiya F, Kataoka R, Kadokura A, Mukai T, Yumoto K, Menietti DJ, Parks G, Liou K, Honary F, Donovan E. Two-step evolution of auroral acceleration at substorm onset. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2010ja015361] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- A. Morioka
- Planetary Plasma and Atmospheric Research Center; Tohoku University; Sendai Japan
| | - Y. Miyoshi
- Solar-Terrestrial Environment Laboratory; Nagoya University; Nagoya Japan
| | - Y. Miyashita
- Solar-Terrestrial Environment Laboratory; Nagoya University; Nagoya Japan
| | - Y. Kasaba
- Geophysical Institute; Tohoku University; Sendai Japan
| | - H. Misawa
- Planetary Plasma and Atmospheric Research Center; Tohoku University; Sendai Japan
| | - F. Tsuchiya
- Planetary Plasma and Atmospheric Research Center; Tohoku University; Sendai Japan
| | - R. Kataoka
- Interactive Research Center; Tokyo Institute of Technology; Tokyo Japan
| | - A. Kadokura
- National Institute of Polar Research; Tokyo Japan
| | - T. Mukai
- Japan Aerospace Exploration Agency; Tokyo Japan
| | - K. Yumoto
- Space Environment Research Center; Kyushu University; Fukuoka Japan
| | - D. J. Menietti
- Department of Physics and Astronomy; University of Iowa; Iowa City Iowa USA
| | - G. Parks
- Space Sciences Laboratory; University of California; Berkeley California USA
| | - K. Liou
- Johns Hopkins University Applied Physics Laboratory; Laurel Maryland USA
| | - F. Honary
- Department of Communication Systems; Lancaster University; Lancaster UK
| | - E. Donovan
- Department of Physics and Astronomy; University of Calgary; Calgary, Alberta Canada
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Morioka A, Miyoshi Y, Tsuchiya F, Misawa H, Yumoto K, Parks GK, Anderson RR, Menietti JD, Donovan EF, Honary F, Spanswick E. AKR breakup and auroral particle acceleration at substorm onset. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2008ja013322] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- A. Morioka
- Planetary Plasma and Atmospheric Research Center; Tohoku University; Sendai Japan
| | - Y. Miyoshi
- Solar-Terrestrial Environment Laboratory; Nagoya University; Nagoya Japan
| | - F. Tsuchiya
- Planetary Plasma and Atmospheric Research Center; Tohoku University; Sendai Japan
| | - H. Misawa
- Planetary Plasma and Atmospheric Research Center; Tohoku University; Sendai Japan
| | - K. Yumoto
- Space Environment Research Center; Kyushu University; Fukuoka Japan
| | - G. K. Parks
- Space Sciences Laboratory; University of California; Berkeley California USA
| | - R. R. Anderson
- Department of Physics and Astronomy; University of Iowa; Iowa City Iowa USA
| | - J. D. Menietti
- Department of Physics and Astronomy; University of Iowa; Iowa City Iowa USA
| | - E. F. Donovan
- Department of Physics and Astronomy; University of Calgary; Calgary, Alberta Canada
| | - F. Honary
- Department of Communication Systems; Lancaster University; Lancaster UK
| | - E. Spanswick
- Department of Physics and Astronomy; University of Calgary; Calgary, Alberta Canada
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Morioka A, Miyoshi Y, Tsuchiya F, Misawa H, Sakanoi T, Yumoto K, Anderson RR, Menietti JD, Donovan EF. Dual structure of auroral acceleration regions at substorm onsets as derived from auroral kilometric radiation spectra. ACTA ACUST UNITED AC 2007. [DOI: 10.1029/2006ja012186] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- A. Morioka
- Planetary Plasma and Atmospheric Research Center; Tohoku University; Sendai Japan
| | - Y. Miyoshi
- Solar-Terrestrial Environment Laboratory; Nagoya University; Nagoya Japan
| | - F. Tsuchiya
- Planetary Plasma and Atmospheric Research Center; Tohoku University; Sendai Japan
| | - H. Misawa
- Planetary Plasma and Atmospheric Research Center; Tohoku University; Sendai Japan
| | - T. Sakanoi
- Planetary Plasma and Atmospheric Research Center; Tohoku University; Sendai Japan
| | - K. Yumoto
- Space Environment Research Center; Kyushu University; Fukuoka Japan
| | - R. R. Anderson
- Department of Physics and Astronomy; University of Iowa; Iowa City Iowa USA
| | - J. D. Menietti
- Department of Physics and Astronomy; University of Iowa; Iowa City Iowa USA
| | - E. F. Donovan
- Department of Physics and Astronomy; University of Calgary; Calgary, Alberta Canada
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Song Y, Lysak RL. Displacement current and the generation of parallel electric fields. PHYSICAL REVIEW LETTERS 2006; 96:145002. [PMID: 16712084 DOI: 10.1103/physrevlett.96.145002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2005] [Indexed: 05/09/2023]
Abstract
We show for the first time the dynamical relationship between the generation of magnetic field-aligned electric field (E||) and the temporal changes and spatial gradients of magnetic and velocity shears, and the plasma density in Earth's magnetosphere. We predict that the signatures of reconnection and auroral particle acceleration should have a correlation with low plasma density, and a localized voltage drop (V||) should often be associated with a localized magnetic stress concentration. Previous interpretations of the E|| generation are mostly based on the generalized Ohm's law, causing serious confusion in understanding the nature of reconnection and auroral acceleration.
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Affiliation(s)
- Yan Song
- School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USA
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Lundin R, Winningham D, Barabash S, Frahm R, Holmström M, Sauvaud JA, Fedorov A, Asamura K, Coates AJ, Soobiah Y, Hsieh KC, Grande M, Koskinen H, Kallio E, Kozyra J, Woch J, Fraenz M, Brain D, Luhmann J, McKenna-Lawler S, Orsini RS, Brandt P, Wurz P. Plasma Acceleration Above Martian Magnetic Anomalies. Science 2006; 311:980-3. [PMID: 16484488 DOI: 10.1126/science.1122071] [Citation(s) in RCA: 102] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Auroras are caused by accelerated charged particles precipitating along magnetic field lines into a planetary atmosphere, the auroral brightness being roughly proportional to the precipitating particle energy flux. The Analyzer of Space Plasma and Energetic Atoms experiment on the Mars Express spacecraft has made a detailed study of acceleration processes on the nightside of Mars. We observed accelerated electrons and ions in the deep nightside high-altitude region of Mars that map geographically to interface/cleft regions associated with martian crustal magnetization regions. By integrating electron and ion acceleration energy down to the upper atmosphere, we saw energy fluxes in the range of 1 to 50 milliwatts per square meter per second. These conditions are similar to those producing bright discrete auroras above Earth. Discrete auroras at Mars are therefore expected to be associated with plasma acceleration in diverging magnetic flux tubes above crustal magnetization regions, the auroras being distributed geographically in a complex pattern by the many multipole magnetic field lines extending into space.
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Affiliation(s)
- R Lundin
- Swedish Institute of Space Physics, Box 812, S-98 128, Kiruna, Sweden
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Imhof WL. The dependence of AKR production on the intensity and energy spectra of auroral bremsstrahlung. ACTA ACUST UNITED AC 2003. [DOI: 10.1029/2002ja009274] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Pritchett PL, Strangeway RJ, Ergun RE, Carlson CW. Generation and propagation of cyclotron maser emissions in the finite auroral kilometric radiation source cavity. ACTA ACUST UNITED AC 2002. [DOI: 10.1029/2002ja009403] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- P. L. Pritchett
- Department of Physics and Astronomy; University of California; Los Angeles California USA
| | - R. J. Strangeway
- Institute of Geophysics and Planetary Physics; University of California; Los Angeles California USA
| | - R. E. Ergun
- Department of Astrophysical and Planetary Sciences and Laboratory for Atmospheric and Space Physics; University of Colorado; Boulder Colorado USA
| | - C. W. Carlson
- Space Sciences Laboratory; University of California; Berkeley California USA
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Schriver D. Particle simulation of the auroral zone showing parallel electric fields, waves, and plasma acceleration. ACTA ACUST UNITED AC 1999. [DOI: 10.1029/1999ja900133] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Dors EE, Kletzing CA. Effects of suprathermal tails on auroral electrodynamics. ACTA ACUST UNITED AC 1999. [DOI: 10.1029/1998ja900135] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Kletzing CA, Mozer FS, Torbert RB. Electron temperature and density at high latitude. ACTA ACUST UNITED AC 1998. [DOI: 10.1029/98ja00962] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Lundin R, Yamauchi M, Woch J, Marklund G. Boundary layer polarization and voltage in the 14 MLT region. ACTA ACUST UNITED AC 1995. [DOI: 10.1029/94ja02523] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Calvert W. An explanation for auroral structure and the triggering of auroral kilometric radiation. ACTA ACUST UNITED AC 1995. [DOI: 10.1029/95ja00523] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Olsen RC, Scott LJ, Boardsen SA. Comparison between Liouville's theorem and observed latitudinal distributions of trapped ions in the plasmapause region. ACTA ACUST UNITED AC 1994. [DOI: 10.1029/93ja02776] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Mälkki A, Eriksson AI, Dovner PO, Boström R, Holback B, Holmgren G, Koskinen HEJ. A statistical survey of auroral solitary waves and weak double layers: 1. Occurrence and net voltage. ACTA ACUST UNITED AC 1993. [DOI: 10.1029/93ja01312] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Bryant DA, Bingham R. Double layers are not particle accelerators. PHYSICAL REVIEW LETTERS 1992; 68:37-39. [PMID: 10045106 DOI: 10.1103/physrevlett.68.37] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Singh N, Horwitz JL. Plasmasphere refilling: Recent observations and modeling. ACTA ACUST UNITED AC 1992. [DOI: 10.1029/91ja02602] [Citation(s) in RCA: 91] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Louarn P, Roux A, de Féraudy H, Le Quéau D, André M, Matson L. Trapped electrons as a free energy source for the auroral kilometric radiation. ACTA ACUST UNITED AC 1990. [DOI: 10.1029/ja095ia05p05983] [Citation(s) in RCA: 135] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Thelin B, Aparicio B, Lundin R. Observations of upflowing ionospheric ions in the mid-altitude cusp/cleft region with the Viking satellite. ACTA ACUST UNITED AC 1990. [DOI: 10.1029/ja095ia05p05931] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Pritchett PL, Winglee RM. Generation and propagation of kilometric radiation in the auroral plasma cavity. ACTA ACUST UNITED AC 1989. [DOI: 10.1029/ja094ia01p00129] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Mauk BH. Generation of macroscopic magnetic-field-aligned electric fields by the convection surge ion acceleration mechanism. ACTA ACUST UNITED AC 1989. [DOI: 10.1029/ja094ia07p08911] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Winglee RM, Pritchett PL, Dusenbery PB, Persoon AM, Waite JH, Moore TE, Burch JL, Collin HL, Slavin JA, Sugiura M. Particle acceleration and wave emissions associated with the formation of auroral cavities and enhancements. ACTA ACUST UNITED AC 1988. [DOI: 10.1029/ja093ia12p14567] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Gurgiolo C, Burch JL. Simulation of electron distributions within auroral acceleration regions. ACTA ACUST UNITED AC 1988. [DOI: 10.1029/ja093ia05p03989] [Citation(s) in RCA: 34] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Zarka P, Le Quéau D, Genova F. The maser synchrotron instability in an inhomogeneous medium: Determination of the spectral intensity of auroral kilometric radiation. ACTA ACUST UNITED AC 1986. [DOI: 10.1029/ja091ia12p13542] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Lyons LR. A simple model for polar cap convection patterns and generation of θ auroras. ACTA ACUST UNITED AC 1985. [DOI: 10.1029/ja090ia02p01561] [Citation(s) in RCA: 83] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Pritchett PL, Strangeway RJ. A simulation study of kilometric radiation generation along an auroral field line. ACTA ACUST UNITED AC 1985. [DOI: 10.1029/ja090ia10p09650] [Citation(s) in RCA: 79] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Klumpar DM, Peterson WK, Shelley EG. Direct evidence for two-stage (bimodal) acceleration of ionospheric ions. ACTA ACUST UNITED AC 1984. [DOI: 10.1029/ja089ia12p10779] [Citation(s) in RCA: 81] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Bergmann R. Electrostatic ion (hydrogen) cyclotron and ion acoustic wave instabilities in regions of upward field-aligned current and upward ion beams. ACTA ACUST UNITED AC 1984. [DOI: 10.1029/ja089ia02p00953] [Citation(s) in RCA: 61] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Gurnett DA, Huff RL, Menietti JD, Burch JL, Winningham JD, Shawhan SD. Correlated low-frequency electric and magnetic noise along the auroral field lines. ACTA ACUST UNITED AC 1984. [DOI: 10.1029/ja089ia10p08971] [Citation(s) in RCA: 189] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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