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Title: Explaining the dynamics of the ultra-relativistic third Van Allen radiation belt

Journal Article · · Nature Physics
DOI:https://doi.org/10.1038/nphys3799· OSTI ID:1338757
ORCiD logo [1];  [1];  [2];  [3];  [3];  [4];  [5];  [1];  [1];  [6];  [6];  [7];  [8]; ORCiD logo [9];  [10];  [11]
  1. Univ. of Alberta, Edmonton, AB (Canada). Dept. of Physics
  2. Univ. of Alberta, Edmonton, AB (Canada). Dept. of Physics; NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
  3. The Aerospace Corporation, Los Angeles, CA (United States)
  4. Univ. of Colorado, Boulder, CO (United States). Lab. for Atmospheric and Space Physics
  5. Univ. College London (UCL), Holmbury St. Mary (United Kingdom). Mullard Space Science Lab.
  6. Univ. of New Hampshire, Durham, NH (United States). Inst. for the Study of Earth, Oceans, and Space
  7. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Space and Atmospheric Sciences (NIS-1) Group
  8. National Oceanic and Atmospheric Administration (NOAA), Boulder, CO (United States). Space Weather Prediction Center
  9. National Observatory of Athens, Penteli (Greece). Inst. for Astronomy, Astrophysics, Space Applications and Remote Sensing
  10. National Observatory of Athens, Penteli (Greece). Inst. for Astronomy, Astrophysics, Space Applications and Remote Sensing; National and Kapodistrian Univ. of Athens (Greece). Dept. of Physics
  11. Lancaster Univ. (United Kingdom). Dept. of Physics

Since the discovery of the Van Allen radiation belts over 50 years ago, an explanation for their complete dynamics has remained elusive. Especially challenging is understanding the recently discovered ultra-relativistic third electron radiation belt. Current theory asserts that loss in the heart of the outer belt, essential to the formation of the third belt, must be controlled by high-frequency plasma wave–particle scattering into the atmosphere, via whistler mode chorus, plasmaspheric hiss, or electromagnetic ion cyclotron waves. However, this has failed to accurately reproduce the third belt. In this paper, using a data-driven, time-dependent specification of ultra-low-frequency (ULF) waves we show for the first time how the third radiation belt is established as a simple, elegant consequence of storm-time extremely fast outward ULF wave transport. High-frequency wave–particle scattering loss into the atmosphere is not needed in this case. Finally, when rapid ULF wave transport coupled to a dynamic boundary is accurately specified, the sensitive dynamics controlling the enigmatic ultra-relativistic third radiation belt are naturally explained.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Univ. of Alberta, Edmonton, AB (Canada); Univ. College London (UCL), Holmbury St. Mary (United Kingdom); NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
Sponsoring Organization:
USDOE; National Aeronautics and Space Administration (NASA); Natural Sciences and Engineering Research Council of Canada (NSERC); Science and Technology Facilities Council (STFC) (United Kingdom); Natural Environment Research Council (NERC) (United Kingdom); Canadian Space Agency (CSA); European Union (EU); European Commission (EC)
Contributing Organization:
The Aerospace Corporation, Los Angeles, CA (United States); Univ. of Colorado, Boulder, CO (United States); Univ. of New Hampshire, Durham, NH (United States); National Oceanic and Atmospheric Administration (NOAA), Boulder, CO (United States); National Observatory of Athens, Penteli (Greece); National and Kapodistrian Univ. of Athens (Greece); Lancaster Univ. (United Kingdom)
Grant/Contract Number:
AC52-06NA25396; NAS5-01072; NAS5-02099; ST/L000563/1; NE/L007495/1; 284520
OSTI ID:
1338757
Report Number(s):
LA-UR-16-20639
Journal Information:
Nature Physics, Vol. 12, Issue 10; ISSN 1745-2473
Publisher:
Nature Publishing Group (NPG)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 94 works
Citation information provided by
Web of Science

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Cited By (19)

FORESAIL‐1 CubeSat Mission to Measure Radiation Belt Losses and Demonstrate Deorbiting journal July 2019
Monte Carlo simulations of the sensor head of imaging energetic electron spectrometer onboard a Chinese IGSO navigation satellite journal October 2018
Achievements and Challenges in the Science of Space Weather book January 2017
Helios Observations of Quasiperiodic Density Structures in the Slow Solar Wind at 0.3, 0.4, and 0.6 AU journal February 2019
Radiation Belt Slot Region Filling Events: Sustained Energetic Precipitation Into the Mesosphere journal September 2018
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 journal March 2019
FORESAIL-1 cubesat mission to measure radiation belt losses and demonstrate de-orbiting text January 2019
Coronal mass ejections and their sheath regions in interplanetary space journal November 2017
On the Close Correspondence Between Storm Time ULF Wave Power and the POES VLF Chorus Wave Amplitude Proxy journal February 2019
Accurately characterizing the importance of wave-particle interactions in radiation belt dynamics: The pitfalls of statistical wave representations: PITFALLS OF STATISTICAL WAVE MODELS journal August 2016
Multiyear Measurements of Radiation Belt Electrons: Acceleration, Transport, and Loss journal April 2019
Explaining the apparent impenetrable barrier to ultra-relativistic electrons in the outer Van Allen belt journal May 2018
A diagnosis of the plasma waves responsible for the explosive energy release of substorm onset journal November 2018
Explaining the Apparent Impenetrable Barrier to Ultra-relativistic Electrons in the Outer Van Allen Belt conference May 2018
The dynamics of Van Allen belts revisited journal February 2018
Achievements and Challenges in the Science of Space Weather journal August 2017
Reply to 'The dynamics of Van Allen belts revisited' journal February 2018
From solar sneezing to killer electrons: outer radiation belt response to solar eruptions
  • Daglis, Ioannis A.; Katsavrias, Christos; Georgiou, Marina
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 377, Issue 2148 https://doi.org/10.1098/rsta.2018.0097
journal May 2019
Decay of Ultrarelativistic Remnant Belt Electrons Through Scattering by Plasmaspheric Hiss journal July 2019

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