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Combined convective and diffusive simulations: VERB-4D comparison with 17 March 2013 Van Allen Probes observations: VERB-4D

Journal Article · · Geophysical Research Letters
DOI:https://doi.org/10.1002/2015GL065230· OSTI ID:1335610
 [1];  [2];  [2];  [3];  [4];  [5]
  1. Univ. of California, Los Angeles, CA (United States). Dept. of Earth, Planetary, and Space Sciences; Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Earth Atmospheric and Planetary Sciences
  2. Univ. of California, Los Angeles, CA (United States). Dept. of Earth, Planetary, and Space Sciences
  3. Univ. of New Hampshire, Durham, NH (United States). Inst. for the Study of Earth, Oceans, and Space
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  5. Univ. of Colorado, Boulder, CO (United States). Lab. of Atmospheric and Space Physics
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Our study focused on understanding the coupling between different electron populations in the inner magnetosphere and the various physical processes that determine evolution of electron fluxes at different energies. Observations during the 17 March 2013 storm and simulations with a newly developed Versatile Electron Radiation Belt-4D (VERB-4D) are presented. This analysis of the drift trajectories of the energetic and relativistic electrons shows that electron trajectories at transitional energies with a first invariant on the scale of ~100 MeV/G may resemble ring current or relativistic electron trajectories depending on the level of geomagnetic activity. Simulations with the VERB-4D code including convection, radial diffusion, and energy diffusion are presented. Sensitivity simulations including various physical processes show how different acceleration mechanisms contribute to the energization of energetic electrons at transitional energies. In particular, the range of energies where inward transport is strongly influenced by both convection and radial diffusion are studied. Our results of the 4-D simulations are compared to Van Allen Probes observations at a range of energies including source, seed, and core populations of the energetic and relativistic electrons in the inner magnetosphere.
Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1335610
Report Number(s):
LA-UR--15-28236
Journal Information:
Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 22 Vol. 42; ISSN 0094-8276
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (19)

Exclusion principle for very oblique and parallel lower band chorus waves: CHORUS WAVE EXCLUSION journal November 2016
Radiation belt electron acceleration during the 17 March 2015 geomagnetic storm: Observations and simulations: Radiation Belt Electron Acceleration journal June 2016
Physical mechanism causing rapid changes in ultrarelativistic electron pitch angle distributions right after a shock arrival: Evaluation of an electron dropout event journal September 2016
Scaling laws for the inner structure of the radiation belts: RADIATION BELT STRUCTURE journal April 2017
Contemporaneous EMIC and whistler mode waves: Observations and consequences for MeV electron loss: SIMULTANEOUS EMIC AND WHISTLER OBSERVATIONS journal August 2017
Quantitative Evaluation of Radial Diffusion and Local Acceleration Processes During GEM Challenge Events journal March 2018
Impact of space weather on the satellite industry: Space Weather Impact on Satellites journal June 2017
Long-term evolution of electron distribution function due to nonlinear resonant interaction with whistler mode waves journal April 2018
EMIC Wave Events During the Four GEM QARBM Challenge Intervals journal August 2018
Earth's Van Allen Radiation Belts: From Discovery to the Van Allen Probes Era journal November 2019
Transport and Loss of Ring Current Electrons Inside Geosynchronous Orbit During the 17 March 2013 Storm journal February 2019
Observations and Fokker‐Planck Simulations of the L ‐Shell, Energy, and Pitch Angle Structure of Earth's Electron Radiation Belts During Quiet Times journal February 2019
Multiyear Measurements of Radiation Belt Electrons: Acceleration, Transport, and Loss journal April 2019
Improved Simulations of The Inner Magnetosphere During High Geomagnetic Activity With the RAM‐SCB Model journal June 2019
Quantitative Assessment of Radiation Belt Modeling journal February 2019
Realistic Worst Case for a Severe Space Weather Event Driven by a Fast Solar Wind Stream journal September 2018
Time-Window Approaches to Space-Weather Forecast Metrics: A Solar Wind Case Study journal November 2018
Reanalysis of Ring Current Electron Phase Space Densities Using Van Allen Probe Observations, Convection Model, and Log‐Normal Kalman Filter journal April 2019
On the Importance of Gradients in the Low‐Energy Electron Phase Space Density for Relativistic Electron Acceleration journal April 2019

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Related Subjects

58 GEOSCIENCES
Heliospheric and Magnetospheric Physics