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Sinevich AA, Chernyshov AA, Chugunin DV, Oinats AV, Clausen LBN, Miloch WJ, Nishitani N, Mogilevsky MM. Small-Scale Irregularities Within Polarization Jet/SAID During Geomagnetic Activity. GEOPHYSICAL RESEARCH LETTERS 2022; 49:e2021GL097107. [PMID: 35860460 PMCID: PMC9285451 DOI: 10.1029/2021gl097107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 04/01/2022] [Accepted: 04/07/2022] [Indexed: 06/15/2023]
Abstract
We study the spatial structure of a polarization jet/Sub-Auroral Ion Drift (PJ/SAID) based on data from the NorSat-1 and Swarm satellites during a geomagnetic storm. Observations of plasma parameters inside the PJ/SAID are obtained with NorSat-1 using a system of Langmuir probes with a nominal sampling rate of up to 1 kHz, which allowed measurements with such a high temporal resolution for the first time. A comparative analysis of plasma parameters and electron density spectra inside PJ according to the data from both satellites is presented. Our results show that fluctuations of plasma parameters inside the PJ increase at all scales with increasing geomagnetic activity. Small-scale irregularities in the PJ are measured in situ down to hundreds of meters. The role of large-scale effects in the PJ increases in comparison with the small-scale ones during high geomagnetic activity. The PJ consists of structures ∼0.2° latitude in size within which small-scale irregularities are present.
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Affiliation(s)
- A. A. Sinevich
- Space Research Institute of the Russian Academy of ScienceMoscowRussia
- National Research University Higher School of EconomicsMoscowRussia
| | - A. A. Chernyshov
- Space Research Institute of the Russian Academy of ScienceMoscowRussia
- National Research University Higher School of EconomicsMoscowRussia
| | - D. V. Chugunin
- Space Research Institute of the Russian Academy of ScienceMoscowRussia
| | - A. V. Oinats
- Institute of Solar Terrestrial PhysicsSB RASIrkutskRussia
| | | | - W. J. Miloch
- Department of PhysicsUniversity of OsloOsloNorway
| | - N. Nishitani
- Institute for Space‐Earth Environmental ResearchNagoya UniversityNagoyaJapan
| | - M. M. Mogilevsky
- Space Research Institute of the Russian Academy of ScienceMoscowRussia
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Aseev NA, Shprits YY, Wang D, Wygant J, Drozdov AY, Kellerman AC, Reeves GD. Transport and Loss of Ring Current Electrons Inside Geosynchronous Orbit During the 17 March 2013 Storm. JOURNAL OF GEOPHYSICAL RESEARCH. SPACE PHYSICS 2019; 124:915-933. [PMID: 31008006 PMCID: PMC6472511 DOI: 10.1029/2018ja026031] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 12/04/2018] [Accepted: 01/14/2019] [Indexed: 06/09/2023]
Abstract
Ring current electrons (1-100 keV) have received significant attention in recent decades, but many questions regarding their major transport and loss mechanisms remain open. In this study, we use the four-dimensional Versatile Electron Radiation Belt code to model the enhancement of phase space density that occurred during the 17 March 2013 storm. Our model includes global convection, radial diffusion, and scattering into the Earth's atmosphere driven by whistler-mode hiss and chorus waves. We study the sensitivity of the model to the boundary conditions, global electric field, the electric field associated with subauroral polarization streams, electron loss rates, and radial diffusion coefficients. The results of the code are almost insensitive to the model parameters above 4.5 R E R E, which indicates that the general dynamics of the electrons between 4.5 R E and the geostationary orbit can be explained by global convection. We found that the major discrepancies between the model and data can stem from the inaccurate electric field model and uncertainties in lifetimes. We show that additional mechanisms that are responsible for radial transport are required to explain the dynamics of ≥40-keV electrons, and the inclusion of the radial diffusion rates that are typically assumed in radiation belt studies leads to a better agreement with the data. The overall effect of subauroral polarization streams on the electron phase space density profiles seems to be smaller than the uncertainties in other input parameters. This study is an initial step toward understanding the dynamics of these particles inside the geostationary orbit.
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Affiliation(s)
- N. A. Aseev
- GFZ German Research Centre for GeosciencesPotsdamGermany
- Institute of Physics and AstronomyUniversity of PotsdamPotsdamGermany
| | - Y. Y. Shprits
- GFZ German Research Centre for GeosciencesPotsdamGermany
- Institute of Physics and AstronomyUniversity of PotsdamPotsdamGermany
- Department of Earth, Planetary, and Space SciencesUniversity of CaliforniaLos AngelesCAUSA
| | - D. Wang
- GFZ German Research Centre for GeosciencesPotsdamGermany
| | - J. Wygant
- School of Physics and AstronomyUniversity of MinnesotaMinneapolisMNUSA
| | - A. Y. Drozdov
- Department of Earth, Planetary, and Space SciencesUniversity of CaliforniaLos AngelesCAUSA
| | - A. C. Kellerman
- Department of Earth, Planetary, and Space SciencesUniversity of CaliforniaLos AngelesCAUSA
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Fernandes PA, Larsen BA, Thomsen MF, Skoug RM, Reeves GD, Denton MH, Friedel RHW, Funsten HO, Goldstein J, Henderson MG, Jahn J, MacDonald EA, Olson DK. The plasma environment inside geostationary orbit: A Van Allen Probes HOPE survey. JOURNAL OF GEOPHYSICAL RESEARCH. SPACE PHYSICS 2017; 122:9207-9227. [PMID: 29214118 PMCID: PMC5703442 DOI: 10.1002/2017ja024160] [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: 03/16/2017] [Revised: 07/25/2017] [Accepted: 08/14/2017] [Indexed: 06/07/2023]
Abstract
The two full precessions in local time completed by the Van Allen Probes enable global specification of the near-equatorial inner magnetosphere plasma environment. Observations by the Helium-Oxygen-Proton-Electron (HOPE) mass spectrometers provide detailed insight into the global spatial distribution of electrons, H+, He+, and O+. Near-equatorial omnidirectional fluxes and abundance ratios at energies 0.1-30 keV are presented for 2 ≤ L ≤ 6 as a function of L shell, magnetic local time (MLT), and geomagnetic activity. We present a new tool built on the UBK modeling technique for classifying plasma sheet particle access to the inner magnetosphere. This new tool generates access maps for particles of constant energy for more direct comparison with in situ measurements, rather than the traditional constant μ presentation typically associated with UBK. We present for the first time inner magnetosphere abundances of O+ flux relative to H+ flux as a function of Kp, L, MLT, and energy. At L = 6, the O+/H+ ratio increases with increasing Kp, consistent with previous results. However, at L < 5 the O+/H+ ratio generally decreases with increasing Kp. We identify a new "afternoon bulge" plasma population enriched in 10 keV O+ and superenriched in 10 keV He+ that is present during quiet/moderate geomagnetic activity (Kp < 5) at ~1100-2000 MLT and L shell 2-4. Drift path modeling results are consistent with the narrow energy and approximate MLT location of this enhancement, but the underlying physics describing its formation, structure, and depletion during higher geomagnetic activity are currently not understood.
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Affiliation(s)
- Philip A. Fernandes
- ISR‐1, Los Alamos National LaboratoryLos AlamosNew MexicoUSA
- New Mexico ConsortiumLos AlamosNew MexicoUSA
| | - Brian A. Larsen
- ISR‐1, Los Alamos National LaboratoryLos AlamosNew MexicoUSA
- New Mexico ConsortiumLos AlamosNew MexicoUSA
| | | | - Ruth M. Skoug
- ISR‐1, Los Alamos National LaboratoryLos AlamosNew MexicoUSA
- New Mexico ConsortiumLos AlamosNew MexicoUSA
| | - Geoffrey D. Reeves
- ISR‐1, Los Alamos National LaboratoryLos AlamosNew MexicoUSA
- New Mexico ConsortiumLos AlamosNew MexicoUSA
| | - Michael H. Denton
- New Mexico ConsortiumLos AlamosNew MexicoUSA
- Space Science InstituteBoulderColoradoUSA
| | - Reinhard H. W. Friedel
- New Mexico ConsortiumLos AlamosNew MexicoUSA
- CSES, Los Alamos National LaboratoryLos AlamosNew MexicoUSA
| | | | - Jerry Goldstein
- Department of Space ScienceSouthwest Research InstituteSan AntonioTexasUSA
| | - Michael G. Henderson
- ISR‐1, Los Alamos National LaboratoryLos AlamosNew MexicoUSA
- New Mexico ConsortiumLos AlamosNew MexicoUSA
| | - Jörg‐Micha Jahn
- Department of Space ScienceSouthwest Research InstituteSan AntonioTexasUSA
| | | | - David K. Olson
- ISR‐1, Los Alamos National LaboratoryLos AlamosNew MexicoUSA
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Nagai T, Yukimatu AS, Matsuoka A, Asai KT, Green JC, Onsager TG, Singer HJ. Timescales of relativistic electron enhancements in the slot region. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2006ja011837] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Miyoshi YS, Jordanova VK, Morioka A, Thomsen MF, Reeves GD, Evans DS, Green JC. Observations and modeling of energetic electron dynamics during the October 2001 storm. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005ja011351] [Citation(s) in RCA: 85] [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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Hori T, Lui ATY, Ohtani S, Cson Brandt P, Mauk BH, McEntire RW, Maezawa K, Mukai T, Kasaba Y, Hayakawa H. Storm-time convection electric field in the near-Earth plasma sheet. ACTA ACUST UNITED AC 2005. [DOI: 10.1029/2004ja010449] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- T. Hori
- Johns Hopkins University Applied Physics Laboratory; Laurel Maryland USA
| | - A. T. Y. Lui
- Johns Hopkins University Applied Physics Laboratory; Laurel Maryland USA
| | - S. Ohtani
- Johns Hopkins University Applied Physics Laboratory; Laurel Maryland USA
| | - P. Cson Brandt
- Johns Hopkins University Applied Physics Laboratory; Laurel Maryland USA
| | - B. H. Mauk
- Johns Hopkins University Applied Physics Laboratory; Laurel Maryland USA
| | - R. W. McEntire
- Johns Hopkins University Applied Physics Laboratory; Laurel Maryland USA
| | - K. Maezawa
- Institute of Space and Astronautical Science; Sagamihara Japan
| | - T. Mukai
- Institute of Space and Astronautical Science; Sagamihara Japan
| | - Y. Kasaba
- Institute of Space and Astronautical Science; Sagamihara Japan
| | - H. Hayakawa
- Institute of Space and Astronautical Science; Sagamihara Japan
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Brautigam DH. CRRES electric field power spectra and radial diffusion coefficients. ACTA ACUST UNITED AC 2005. [DOI: 10.1029/2004ja010612] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Xie L, Pu Z, Zhou X, Fu S, Zong Q. Formation of the storm-time ring current. CHINESE SCIENCE BULLETIN-CHINESE 2004. [DOI: 10.1007/bf03184271] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Liemohn MW. Dependence of plasmaspheric morphology on the electric field description during the recovery phase of the 17 April 2002 magnetic storm. ACTA ACUST UNITED AC 2004. [DOI: 10.1029/2003ja010304] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Onsager TG. The radial gradient of relativistic electrons at geosynchronous orbit. ACTA ACUST UNITED AC 2004. [DOI: 10.1029/2003ja010368] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Chen MW, Schulz M, Lu G, Lyons LR. Quasi-steady drift paths in a model magnetosphere with AMIE electric field: Implications for ring current formation. ACTA ACUST UNITED AC 2003. [DOI: 10.1029/2002ja009584] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Margaret W. Chen
- Space Sciences Applications Laboratory; The Aerospace Corporation; El Segundo California USA
| | - Michael Schulz
- Lockheed Martin Advanced Technology Center; Palo Alto California USA
| | - Gang Lu
- High Altitude Observatory; Boulder Colorado USA
| | - Larry R. Lyons
- Department of Atmospheric Sciences; University of California, Los Angeles; Los Angeles California USA
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Khazanov GV. Self-consistent model of magnetospheric ring current and electromagnetic ion cyclotron waves: The 2–7 May 1998 storm. ACTA ACUST UNITED AC 2003. [DOI: 10.1029/2003ja009856] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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13
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Foster JC, Vo HB. Average characteristics and activity dependence of the subauroral polarization stream. ACTA ACUST UNITED AC 2002. [DOI: 10.1029/2002ja009409] [Citation(s) in RCA: 279] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- J. C. Foster
- Haystack Observatory; Massachusetts Institute of Technology; Westford Massachusetts USA
| | - H. B. Vo
- Haystack Observatory; Massachusetts Institute of Technology; Westford Massachusetts USA
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Ridley AJ, Liemohn MW. A model-derived storm time asymmetric ring current driven electric field description. ACTA ACUST UNITED AC 2002. [DOI: 10.1029/2001ja000051] [Citation(s) in RCA: 111] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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15
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Fok MC, Wolf RA, Spiro RW, Moore TE. Comprehensive computational model of Earth's ring current. ACTA ACUST UNITED AC 2001. [DOI: 10.1029/2000ja000235] [Citation(s) in RCA: 224] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Liou K, Meng CI, Newell PT, Lui ATY, Reeves GD, Belian RD. Particle injections with auroral expansions. ACTA ACUST UNITED AC 2001. [DOI: 10.1029/2000ja003003] [Citation(s) in RCA: 27] [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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17
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Korth A, Friedel RHW, Mouikis CG, Fennell JF, Wygant JR, Korth H. Comprehensive particle and field observations of magnetic storms at different local times from the CRRES spacecraft. ACTA ACUST UNITED AC 2000. [DOI: 10.1029/1999ja000430] [Citation(s) in RCA: 37] [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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18
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Ebihara Y, Ejiri M. Simulation study on fundamental properties of the storm-time ring current. ACTA ACUST UNITED AC 2000. [DOI: 10.1029/1999ja900493] [Citation(s) in RCA: 161] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Wygant J, Rowland D, Singer HJ, Temerin M, Mozer F, Hudson MK. Experimental evidence on the role of the large spatial scale electric field in creating the ring current. ACTA ACUST UNITED AC 1998. [DOI: 10.1029/98ja01436] [Citation(s) in RCA: 139] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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