A Short-lived Three-Belt Structure for sub-MeV Electrons in the Van Allen Belts: Time Scale and Energy Dependence

被引：16

作者：

Hao, Y. X. ^{[1
]}

Zong, Q. -G. ^{[1
]}

Zhou, X. -Z. ^{[1
]}

Zou, H. ^{[1
]}

Rankin, R. ^{[2
]}

Sun, Y. X. ^{[1
]}

Chen, X. R. ^{[1
]}

Liu, Y. ^{[1
]}

Fu, S. Y. ^{[1
]}

Baker, D. N. ^{[3
]}

Spence, H. E. ^{[4
]}

Blake, J. B. ^{[5
]}

Reeves, G. D. ^{[6
,7
]}

Claudepierre, S. G. ^{[5
,8
]}

机构：

[1] Peking Univ, Inst Space Phys & Appl Technol, Beijing, Peoples R China

[2] Univ Alberta, Dept Phys, Edmonton, AB, Canada

[3] Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA

[4] Univ New Hampshire, Dept Phys, Inst Earth Oceans & Space, Durham, NH 03824 USA

[5] Aerosp Corp, Space Sci Applicat Lab, El Segundo, CA 90245 USA

[6] Los Alamos Natl Lab, Los Alamos, NM USA

[7] New Mexico Consortium, Los Alamos, NM USA

[8] Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA USA

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS | 2020年 / 125卷 / 09期

基金：

中国国家自然科学基金; 加拿大自然科学与工程研究理事会;

关键词：

OUTER RADIATION BELT; GEOMAGNETIC STORMS; DYNAMICS; MAGNETOSPHERE; SPECTROMETER; INJECTION; LOSSES;

D O I：

10.1029/2020JA028031

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this study we focus on the radiation belt dynamics driven by the geomagnetic storms during September 2017. Besides the long-lasting three-belt structures of ultrarelativistic electrons (>2 MeV, existing for tens of days), which has been studied intensively during the Van Allen Probe era, it is found that magnetospheric electrons of hundreds of keVs can also have three-belt structures at similar L extent during storm time. Measurements of 500-800 keV electrons from MagEIS instrument onboard Van Allen Probes show double-peaked (L = 3.5 and 4.5, respectively) flux-versus-L-shell profile in the outer belt, which lasted for 2-3 days. During the time interval of such transient three-belt structure, the energy-versus-L spectrogram shows novel distributions differing from both "S-shaped" and "V-shaped" spectrograms reported previously. Such peculiar distribution also illustrates the energy-dependent occurrence of the three-belt profile. The gradual formation of "reversed energy spectrum" at L similar to 3.5 also indicates that hiss scattering inside the plasmapause contributed to the fast decay of sub-MeV remnant belt.

引用

页数：13

共 40 条

[1] Stability of the magnetospheric plasma pressure distribution and magnetospheric storms [J].

Skobeltsyn Institute, Nuclear Physics Moscow State University, Moscow, 119899, Russia ;

不详 .

Adv. Space Res., 2006, 8 (1626-1630) :1626-1630

[2] The Relativistic Electron-Proton Telescope (REPT) Instrument on Board the Radiation Belt Storm Probes (RBSP) Spacecraft: Characterization of Earth's Radiation Belt High-Energy Particle Populations [J].

Baker, D. N. ;

Kanekal, S. G. ;

Hoxie, V. C. ;

Batiste, S. ;

Bolton, M. ;

Li, X. ;

Elkington, S. R. ;

Monk, S. ;

Reukauf, R. ;

Steg, S. ;

Westfall, J. ;

Belting, C. ;

Bolton, B. ;

Braun, D. ;

Cervelli, B. ;

Hubbell, K. ;

Kien, M. ;

Knappmiller, S. ;

Wade, S. ;

Lamprecht, B. ;

Stevens, K. ;

Wallace, J. ;

Yehle, A. ;

Spence, H. E. ;

Friedel, R. .

SPACE SCIENCE REVIEWS, 2013, 179 (1-4) :337-381

[3]

Baker DN, 2013, SCIENCE, V340, P186, DOI [10.1126/science.1231518, 10.1126/science.1233518]

[4] The Magnetic Electron Ion Spectrometer (MagEIS) Instruments Aboard the Radiation Belt Storm Probes (RBSP) Spacecraft [J].

Blake, J. B. ;

Carranza, P. A. ;

Claudepierre, S. G. ;

Clemmons, J. H. ;

Crain, W. R., Jr. ;

Dotan, Y. ;

Fennell, J. F. ;

Fuentes, F. H. ;

Galvan, R. M. ;

George, J. S. ;

Henderson, M. G. ;

Lalic, M. ;

Lin, A. Y. ;

Looper, M. D. ;

Mabry, D. J. ;

Mazur, J. E. ;

McCarthy, B. ;

Nguyen, C. Q. ;

O'Brien, T. P. ;

Perez, M. A. ;

Redding, M. T. ;

Roeder, J. L. ;

Salvaggio, D. J. ;

Sorensen, G. A. ;

Spence, H. E. ;

Yi, S. ;

Zakrzewski, M. P. .

SPACE SCIENCE REVIEWS, 2013, 179 (1-4) :383-421

[5] Empirically Estimated Electron Lifetimes in the Earth's Radiation Belts: Comparison With Theory [J].

Claudepierre, S. G. ;

Ma, Q. ;

Bortnik, J. ;

O'Brien, T. P. ;

Fennell, J. F. ;

Blake, J. B. .

GEOPHYSICAL RESEARCH LETTERS, 2020, 47 (03)

[6] A background correction algorithm for Van Allen Probes MagEIS electron flux measurements [J].

Claudepierre, S. G. ;

O'Brien, T. P. ;

Blake, J. B. ;

Fennell, J. F. ;

Roeder, J. L. ;

Clemmons, J. H. ;

Looper, M. D. ;

Mazur, J. E. ;

Mulligan, T. M. ;

Spence, H. E. ;

Reeves, G. D. ;

Friedel, R. H. W. ;

Henderson, M. G. ;

Larsen, B. A. .

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2015, 120 (07) :5703-5727

[7] Contribution of ULF Wave Activity to the Global Recovery of the Outer Radiation Belt During the Passage of a High-Speed Solar Wind Stream Observed in September 2014 [J].

Da Silva, L. A. ;

Sibeck, D. ;

Alves, L. R. ;

Souza, V. M. ;

Jauer, P. R. ;

Claudepierre, S. G. ;

Marchezi, J. P. ;

Agapitov ;

Medeiros, C. ;

Vieira, L. E. A. ;

Wang, C. ;

Jiankui, S. ;

Liu, Z. ;

Gonzalez, W. ;

Dal Lago, A. ;

Rockenbach, M. ;

Padua, M. B. ;

Alves, M., V ;

Barbosa, M. V. G. ;

Fok, M-C ;

Baker, D. ;

Kletzing, C. ;

Kanekal, S. G. ;

Georgiou, M. .

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2019, 124 (03) :1660-1678

[8] A two-ejecta event associated with a two-step geomagnetic storm [J].

Farrugia, C. J. ;

Jordanova, V. K. ;

Thomsen, M. F. ;

Lu, G. ;

Cowley, S. W. H. ;

Ogilvie, K. W. .

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2006, 111 (A11)

[9] The Electric and Magnetic Field Instrument Suite and Integrated Science (EMFISIS) on RBSP [J].

Kletzing, C. A. ;

Kurth, W. S. ;

Acuna, M. ;

MacDowall, R. J. ;

Torbert, R. B. ;

Averkamp, T. ;

Bodet, D. ;

Bounds, S. R. ;

Chutter, M. ;

Connerney, J. ;

Crawford, D. ;

Dolan, J. S. ;

Dvorsky, R. ;

Hospodarsky, G. B. ;

Howard, J. ;

Jordanova, V. ;

Johnson, R. A. ;

Kirchner, D. L. ;

Mokrzycki, B. ;

Needell, G. ;

Odom, J. ;

Mark, D. ;

Pfaff, R., Jr. ;

Phillips, J. R. ;

Piker, C. W. ;

Remington, S. L. ;

Rowland, D. ;

Santolik, O. ;

Schnurr, R. ;

Sheppard, D. ;

Smith, C. W. ;

Thorne, R. M. ;

Tyler, J. .

SPACE SCIENCE REVIEWS, 2013, 179 (1-4) :127-181

[10] Explaining the dynamics of the ultra-relativistic third Van Allen radiation belt [J].

Mann, I. R. ;

Ozeke, L. G. ;

Murphy, K. R. ;

Claudepierre, S. G. ;

Turner, D. L. ;

Baker, D. N. ;

Rae, I. J. ;

Kale, A. ;

Milling, D. K. ;

Boyd, A. J. ;

Spence, H. E. ;

Reeves, G. D. ;

Singer, H. J. ;

Dimitrakoudis, S. ;

Daglis, I. A. ;

Honary, F. .

NATURE PHYSICS, 2016, 12 (10) :978-983

← 1 2 3 4 →