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Title: The effects of magnetospheric processes on relativistic electron dynamics in the Earth's outer radiation belt

Abstract

Using the electron phase space density (PSD) data measured by Van Allen Probe A from January 2013 to April 2015, we investigate the effects of magnetospheric processes on relativistic electron dynamics in the Earth's outer radiation belt during 50 geomagnetic storms. A statistical study shows that the maximum electron PSDs for various μ (μ = 630, 1096, 2290, and 3311 MeV/G) at L*~4.0 after the storm peak have good correlations with storm intensity (cc~0.70). This suggests that the occurrence and magnitude of geomagnetic storms are necessary for relativistic electron enhancements at the inner edge of the outer radiation belt (L* = 4.0). For moderate or weak storm events (SYM–H min > ~–100 nT) with weak substorm activity (AE max < 800 nT) and strong storm events (SYM–H min ≤ ~–100 nT) with intense substorms (AE max ≥ 800 nT) during the recovery phase, the maximum electron PSDs for various μ at different L* values (L* = 4.0, 4.5, and 5.0) are well correlated with storm intensity (cc > 0.77). For storm events with intense substorms after the storm peak, relativistic electron enhancements at L* = 4.5 and 5.0 are observed. This shows that intense substorms during the storm recovery phasemore » are crucial to relativistic electron enhancements in the heart of the outer radiation belt. In conclusion, our statistics study suggests that magnetospheric processes during geomagnetic storms have a significant effect on relativistic electron dynamics.« less

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [6]; ORCiD logo [7]; ORCiD logo [6]; ORCiD logo [5]; ORCiD logo [8]
  1. Shandong Univ., Weihai (China); Chinese Academy of Sciences (CAS), Beijing (China)
  2. Chinese Academy of Sciences (CAS), Beijing (China)
  3. Wuhan Univ., Wuhan (China)
  4. Univ. of Science and Technology of China, Hefei (China)
  5. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  6. Univ. of New Hampshire, Durham, NH (United States)
  7. Univ. of Colorado, Boulder, CO (United States)
  8. The Aerospace Corp. California, Los Angeles, CA (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
National Aeronautic and Space Administration (NASA); USDOE
OSTI Identifier:
1440492
Report Number(s):
LA-UR-17-31424
Journal ID: ISSN 2169-9380; TRN: US1900754
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Geophysical Research. Space Physics
Additional Journal Information:
Journal Volume: 122; Journal Issue: 10; Journal ID: ISSN 2169-9380
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Heliospheric and Magnetospheric Physics

Citation Formats

Tang, C. L., Wang, Y. X., Ni, B., Su, Z. P., Reeves, Geoffrey D., Zhang, J. -C., Baker, D. N., Spence, H. E., Funsten, Herbert O., and Blake, J. B. The effects of magnetospheric processes on relativistic electron dynamics in the Earth's outer radiation belt. United States: N. p., 2017. Web. doi:10.1002/2017JA024407.
Tang, C. L., Wang, Y. X., Ni, B., Su, Z. P., Reeves, Geoffrey D., Zhang, J. -C., Baker, D. N., Spence, H. E., Funsten, Herbert O., & Blake, J. B. The effects of magnetospheric processes on relativistic electron dynamics in the Earth's outer radiation belt. United States. doi:10.1002/2017JA024407.
Tang, C. L., Wang, Y. X., Ni, B., Su, Z. P., Reeves, Geoffrey D., Zhang, J. -C., Baker, D. N., Spence, H. E., Funsten, Herbert O., and Blake, J. B. Fri . "The effects of magnetospheric processes on relativistic electron dynamics in the Earth's outer radiation belt". United States. doi:10.1002/2017JA024407. https://www.osti.gov/servlets/purl/1440492.
@article{osti_1440492,
title = {The effects of magnetospheric processes on relativistic electron dynamics in the Earth's outer radiation belt},
author = {Tang, C. L. and Wang, Y. X. and Ni, B. and Su, Z. P. and Reeves, Geoffrey D. and Zhang, J. -C. and Baker, D. N. and Spence, H. E. and Funsten, Herbert O. and Blake, J. B.},
abstractNote = {Using the electron phase space density (PSD) data measured by Van Allen Probe A from January 2013 to April 2015, we investigate the effects of magnetospheric processes on relativistic electron dynamics in the Earth's outer radiation belt during 50 geomagnetic storms. A statistical study shows that the maximum electron PSDs for various μ (μ = 630, 1096, 2290, and 3311 MeV/G) at L*~4.0 after the storm peak have good correlations with storm intensity (cc~0.70). This suggests that the occurrence and magnitude of geomagnetic storms are necessary for relativistic electron enhancements at the inner edge of the outer radiation belt (L* = 4.0). For moderate or weak storm events (SYM–Hmin > ~–100 nT) with weak substorm activity (AEmax < 800 nT) and strong storm events (SYM–Hmin ≤ ~–100 nT) with intense substorms (AEmax ≥ 800 nT) during the recovery phase, the maximum electron PSDs for various μ at different L* values (L* = 4.0, 4.5, and 5.0) are well correlated with storm intensity (cc > 0.77). For storm events with intense substorms after the storm peak, relativistic electron enhancements at L* = 4.5 and 5.0 are observed. This shows that intense substorms during the storm recovery phase are crucial to relativistic electron enhancements in the heart of the outer radiation belt. In conclusion, our statistics study suggests that magnetospheric processes during geomagnetic storms have a significant effect on relativistic electron dynamics.},
doi = {10.1002/2017JA024407},
journal = {Journal of Geophysical Research. Space Physics},
number = 10,
volume = 122,
place = {United States},
year = {2017},
month = {8}
}

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  • Journal of Geophysical Research: Space Physics, Vol. 113, Issue A4
  • DOI: 10.1029/2007JA012622

Modeling radiation belt radial diffusion in ULF wave fields: 2. Estimating rates of radial diffusion using combined MHD and particle codes: ESTIMATE RADIAL DIFFUSION RATE
journal, June 2010

  • Huang, Chia-Lin; Spence, Harlan E.; Hudson, Mary K.
  • Journal of Geophysical Research: Space Physics, Vol. 115, Issue A6
  • DOI: 10.1029/2009JA014918

Prediction of the AU , AL , and AE indices using solar wind parameters : PREDICTION OF THE
journal, December 2013

  • Luo, Bingxian; Li, Xinlin; Temerin, M.
  • Journal of Geophysical Research: Space Physics, Vol. 118, Issue 12
  • DOI: 10.1002/2013JA019188

Relativistic electron fluxes dropout in the outer radiation belt under different solar wind conditions: RELATIVISTIC ELECTRON FLUXES DROPOUT
journal, December 2013

  • Yuan, Chongjing; Zong, Qiugang
  • Journal of Geophysical Research: Space Physics, Vol. 118, Issue 12
  • DOI: 10.1002/2013JA019066

Predicting the L-position of the storm-injected relativistic electron belt
journal, January 2003


Van Allen probes, NOAA, GOES, and ground observations of an intense EMIC wave event extending over 12 h in magnetic local time: EMIC WAVES AND THE RADIATION BELTS
journal, July 2015

  • Engebretson, M. J.; Posch, J. L.; Wygant, J. R.
  • Journal of Geophysical Research: Space Physics, Vol. 120, Issue 7
  • DOI: 10.1002/2015JA021227

Testing loss mechanisms capable of rapidly depleting relativistic electron flux in the Earth's outer radiation belt
journal, January 2004


Resonant scattering of outer zone relativistic electrons by multiband EMIC waves and resultant electron loss time scales
journal, September 2015

  • Ni, Binbin; Cao, Xing; Zou, Zhengyang
  • Journal of Geophysical Research: Space Physics, Vol. 120, Issue 9
  • DOI: 10.1002/2015JA021466

Prompt enhancement of the Earth's outer radiation belt due to substorm electron injections: SUBSTORM ELECTRON INJECTIONS
journal, December 2016

  • Tang, C. L.; Zhang, J. -C.; Reeves, G. D.
  • Journal of Geophysical Research: Space Physics, Vol. 121, Issue 12
  • DOI: 10.1002/2016JA023550

A new model for the prediction of Dst on the basis of the solar wind
journal, December 2002

  • Temerin, M.; Li, Xinlin
  • Journal of Geophysical Research: Space Physics, Vol. 107, Issue A12
  • DOI: 10.1029/2001JA007532

THEMIS observations of the near-Earth plasma sheet during a substorm: THEMIS OBSERVATIONS OF SUBSTORM
journal, September 2009

  • Tang, C. L.; Li, Z. Y.; Angelopoulos, V.
  • Journal of Geophysical Research: Space Physics, Vol. 114, Issue A9
  • DOI: 10.1029/2008JA013729

Multiple loss processes of relativistic electrons outside the heart of outer radiation belt during a storm sudden commencement: RELATIVISTIC ELECTRON LOSS DURING A SSC
journal, December 2015

  • Yu, J.; Li, L. Y.; Cao, J. B.
  • Journal of Geophysical Research: Space Physics, Vol. 120, Issue 12
  • DOI: 10.1002/2015JA021460

Substorm dependence of chorus amplitudes: Implications for the acceleration of electrons to relativistic energies
journal, July 2001

  • Meredith, Nigel P.; Horne, Richard B.; Anderson, Roger R.
  • Journal of Geophysical Research: Space Physics, Vol. 106, Issue A7
  • DOI: 10.1029/2000JA900156

Slot region electron loss timescales due to plasmaspheric hiss and lightning-generated whistlers: SLOT REGION ELECTRON LOSS TIMESCALES
journal, August 2007

  • Meredith, Nigel P.; Horne, Richard B.; Glauert, Sarah A.
  • Journal of Geophysical Research: Space Physics, Vol. 112, Issue A8
  • DOI: 10.1029/2007JA012413

Using the NARMAX approach to model the evolution of energetic electrons fluxes at geostationary orbit: NARMAX MODELLING OF RADIATION BELT ELECTRON FLUXES
journal, September 2011

  • Balikhin, M. A.; Boynton, R. J.; Walker, S. N.
  • Geophysical Research Letters, Vol. 38, Issue 18
  • DOI: 10.1029/2011GL048980

Multisatellite observations of the outer zone electron variation during the November 3–4, 1993, magnetic storm
journal, January 1997

  • Li, Xinlin; Baker, D. N.; Temerin, M.
  • Journal of Geophysical Research: Space Physics, Vol. 102, Issue A7
  • DOI: 10.1029/97JA01101

Some Properties of the Van Allen Radiation
journal, March 1960


Evaluation of quasi-linear diffusion coefficients for EMIC waves in a multispecies plasma
journal, January 2003


Electron acceleration associated with the magnetic flux pileup regions in the near-Earth plasma sheet: A multicase study: ELECTRON ACCELERATION INSIDE FPR
journal, May 2016

  • Tang, C. L.; Zhou, M.; Yao, Z. H.
  • Journal of Geophysical Research: Space Physics, Vol. 121, Issue 5
  • DOI: 10.1002/2016JA022406

Quantifying the relative contributions of substorm injections and chorus waves to the rapid outward extension of electron radiation belt
journal, December 2014

  • Su, Zhenpeng; Zhu, Hui; Xiao, Fuliang
  • Journal of Geophysical Research: Space Physics, Vol. 119, Issue 12
  • DOI: 10.1002/2014JA020709

Responses of Earth's radiation belts to solar wind dynamic pressure variations in 2002 analyzed using multisatellite data and Kalman filtering: ELECTRON PHASE SPACE DENSITY DROPOUTS
journal, July 2013

  • Ni, Binbin; Shprits, Yuri Y.; Friedel, Reiner H. W.
  • Journal of Geophysical Research: Space Physics, Vol. 118, Issue 7
  • DOI: 10.1002/jgra.50437

Radiation belt electron acceleration during the 17 March 2015 geomagnetic storm: Observations and simulations: Radiation Belt Electron Acceleration
journal, June 2016

  • Li, W.; Ma, Q.; Thorne, R. M.
  • Journal of Geophysical Research: Space Physics, Vol. 121, Issue 6
  • DOI: 10.1002/2016JA022400

Direct evidence for EMIC wave scattering of relativistic electrons in space: EMIC-Driven Electron Losses in Space
journal, July 2016

  • Zhang, X. -J.; Li, W.; Ma, Q.
  • Journal of Geophysical Research: Space Physics, Vol. 121, Issue 7
  • DOI: 10.1002/2016JA022521

The effects of geomagnetic storms on electrons in Earth's radiation belts: RADIATION BELT ELECTRON RESPONSES TO STORMS
journal, November 2015

  • Turner, D. L.; O'Brien, T. P.; Fennell, J. F.
  • Geophysical Research Letters, Vol. 42, Issue 21
  • DOI: 10.1002/2015GL064747

Evolution of chorus emissions into plasmaspheric hiss observed by Van Allen Probes: CHORUS EVOLVE INTO HISS
journal, May 2016

  • Zhou, Qinghua; Xiao, Fuliang; Yang, Chang
  • Journal of Geophysical Research: Space Physics, Vol. 121, Issue 5
  • DOI: 10.1002/2016JA022366

Characterizing the Earth's outer Van Allen zone using a radiation belt content index: A RADATION BELT CONTENT INDEX
journal, February 2004

  • Baker, D. N.; Kanekal, S. G.; Blake, J. B.
  • Space Weather, Vol. 2, Issue 2
  • DOI: 10.1029/2003SW000026

Wave-induced loss of ultra-relativistic electrons in the Van Allen radiation belts
journal, September 2016

  • Shprits, Yuri Y.; Drozdov, Alexander Y.; Spasojevic, Maria
  • Nature Communications, Vol. 7, Issue 1
  • DOI: 10.1038/ncomms12883

Evidence for injection of relativistic electrons into the Earth's outer radiation belt via intense substorm electric fields
journal, February 2014

  • Dai, Lei; Wygant, John R.; Cattell, Cynthia A.
  • Geophysical Research Letters, Vol. 41, Issue 4
  • DOI: 10.1002/2014GL059228

Dynamic evolution of energetic outer zone electrons due to wave-particle interactions during storms: EVOLUTION OF ENERGETIC ELECTRONS
journal, October 2007

  • Li, W.; Shprits, Y. Y.; Thorne, R. M.
  • Journal of Geophysical Research: Space Physics, Vol. 112, Issue A10
  • DOI: 10.1029/2007JA012368

Quantifying the radiation belt seed population in the 17 March 2013 electron acceleration event
journal, April 2014

  • Boyd, A. J.; Spence, H. E.; Claudepierre, S. G.
  • Geophysical Research Letters, Vol. 41, Issue 7
  • DOI: 10.1002/2014GL059626

Global distribution of wave amplitudes and wave normal angles of chorus waves using THEMIS wave observations: CHORUS WAVE DISTRIBUTION ON THEMIS
journal, December 2011

  • Li, W.; Bortnik, J.; Thorne, R. M.
  • Journal of Geophysical Research: Space Physics, Vol. 116, Issue A12
  • DOI: 10.1029/2011JA017035

Fast dropouts of multi-MeV electrons due to combined effects of EMIC and whistler mode waves: FAST DROPOUTS OF MULTI-MEV ELECTRONS
journal, May 2016

  • Mourenas, D.; Artemyev, A. V.; Ma, Q.
  • Geophysical Research Letters, Vol. 43, Issue 9
  • DOI: 10.1002/2016GL068921

The relativistic electron response in the outer radiation belt during magnetic storms
journal, January 2002


The Electric and Magnetic Field Instrument Suite and Integrated Science (EMFISIS) on RBSP
journal, June 2013


Predicting the L-position of the storm-injected relativistic electron belt
journal, January 2003


The Magnetic Electron Ion Spectrometer (MagEIS) Instruments Aboard the Radiation Belt Storm Probes (RBSP) Spacecraft
journal, June 2013


Science Objectives and Rationale for the Radiation Belt Storm Probes Mission
journal, September 2012