Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Comparing simulated and observed EMIC wave amplitudes using in situ Van Allen Probes’ measurements

Journal Article · · Journal of Atmospheric and Solar-Terrestrial Physics
 [1];  [2];  [1];  [1];  [1];  [3];  [3];  [1];  [4];  [5];  [6]
  1. Univ. of New Hampshire, Durham, NH (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); The New Mexico Consortium, Los Alamos, NM (United States)
  4. Univ. of Iowa, Iowa City, IA (United States)
  5. Univ. of California, Los Angeles, CA (United States)
  6. Univ. of California, Los Angeles, CA (United States) ; University of Potsdam (Germany)
+ Show Author Affiliations

In this study, we perform a statistical study calculating electromagnetic ion cyclotron (EMIC) wave amplitudes based off in situ plasma measurements taken by the Van Allen Probes’ (1.1–5.8 Re) Helium, Oxygen, Proton, Electron (HOPE) instrument. Calculated wave amplitudes are compared to EMIC waves observed by the Electric and Magnetic Field Instrument Suite and Integrated Science on board the Van Allen Probes during the same period. The survey covers a 22-month period (1 November 2012 to 31 August 2014), a full Van Allen Probe magnetic local time (MLT) precession. The linear theory proxy was used to identify EMIC wave events with plasma conditions favorable for EMIC wave excitation. Two hundred and thirty-two EMIC wave events (103 H+-band and 129 He+-band) were selected for this comparison. Nearly all events selected are observed beyond L = 4. Results show that calculated wave amplitudes exclusively using the in situ HOPE measurements produce amplitudes too low compared to the observed EMIC wave amplitudes. Hot proton anisotropy (Ahp) distributions are asymmetric in MLT within the inner (L < 7) magnetosphere with peak (minimum) Ahp, ~0.81 to 1.00 (~0.62), observed in the dawn (dusk), 0000 < MLT ≤ 1200 (1200 < MLT ≤ 2400), sectors. Measurements of Ahp are found to decrease in the presence of EMIC wave activity. Ahp amplification factors are determined and vary with respect to EMIC wave-band and MLT. Lastly, He+-band events generally require double (quadruple) the measured Ahp for the dawn (dusk) sector to reproduce the observed EMIC wave amplitudes.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE; NASA
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1422963
Report Number(s):
LA-UR--17-23552
Journal Information:
Journal of Atmospheric and Solar-Terrestrial Physics, Journal Name: Journal of Atmospheric and Solar-Terrestrial Physics Vol. 177; ISSN 1364-6826
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (57)

Testing linear theory of EMIC waves in the inner magnetosphere: Cluster observations: Testing linear theory of EMIC waves journal February 2014
Simulations of inner magnetosphere dynamics with an expanded RAM-SCB model and comparisons with Van Allen Probes observations journal April 2014
Excitation of EMIC waves detected by the Van Allen Probes on 28 April 2013: EMIC WAVE EXCITATION journal June 2014
In situ signatures of residual plasmaspheric plumes: Observations and simulation journal June 2014
Model of electromagnetic ion cyclotron waves in the inner magnetosphere journal September 2014
Global morphology and spectral properties of EMIC waves derived from CRRES observations journal July 2014
Effect of spatial density variation and O+ concentration on the growth and evolution of electromagnetic ion cyclotron waves journal October 2014
A statistical study of EMIC waves observed by Cluster: 1. Wave properties: EMIC Wave Properties journal July 2015
Automated determination of electron density from electric field measurements on the Van Allen Probes spacecraft: AUTOMATED ELECTRON DENSITY DETERMINATION journal May 2016
The dependence on geomagnetic conditions and solar wind dynamic pressure of the spatial distributions of EMIC waves observed by the Van Allen Probes: RBSP EMIC WAVES journal May 2016
A statistical study of EMIC waves observed by Cluster: 2. Associated plasma conditions: EMIC Plasma Conditions journal July 2016
Dependence of EMIC wave parameters during quiet, geomagnetic storm, and geomagnetic storm phase times: STORM TIME EMIC WAVES journal July 2016
Multi-instrument observations from Svalbard of a traveling convection vortex, electromagnetic ion cyclotron wave burst, and proton precipitation associated with a bow shock instability: TCV/Pc1 BURST EVENT ON SVALBARD journal June 2013
Global characteristics of electromagnetic ion cyclotron waves: Occurrence rate and its storm dependence: GLOBAL CHARACTERISTICS OF EMIC WAVES journal July 2013
Statistical analysis of EMIC waves in plasmaspheric plumes from Cluster observations: EMIC WAVES IN PLASMASPHERIC PLUMES journal August 2013
Multiple bidirectional EMIC waves observed by Cluster at middle magnetic latitudes in the dayside magnetosphere: MULTIPLE BIDIRECTIONAL EMIC WAVES journal October 2013
Some processes in the magnetosphere journal July 1971
Science Objectives and Rationale for the Radiation Belt Storm Probes Mission journal September 2012
The Radiation Belt Storm Probes (RBSP) and Space Weather journal December 2012
Science Goals and Overview of the Radiation Belt Storm Probes (RBSP) Energetic Particle, Composition, and Thermal Plasma (ECT) Suite on NASA’s Van Allen Probes Mission journal October 2013
Helium, Oxygen, Proton, and Electron (HOPE) Mass Spectrometer for the Radiation Belt Storm Probes Mission journal March 2013
The Electric and Magnetic Field Instrument Suite and Integrated Science (EMFISIS) on RBSP journal June 2013
Is the plasmapause a preferred source region of electromagnetic ion cyclotron waves in the magnetosphere? journal July 2001
Modeling for precipitation loss of ring current protons by electromagnetic ion cyclotron waves journal January 2011
Modeling ring current proton precipitation by electromagnetic ion cyclotron waves during the May 14-16, 1997, storm journal January 2001
Modeling the dynamics of the inner magnetosphere during strong geomagnetic storms journal January 2005
Simultaneous appearance of isolated auroral arcs and Pc 1 geomagnetic pulsations at subauroral latitudes: ISOLATED AURORAS AND PC 1 PULSATIONS journal May 2008
Multipoint observations of Pc1-2 waves in the afternoon sector: MULTIPOINT OBSERVATIONS OF PC1-2 journal September 2009
Ion observations from geosynchronous orbit as a proxy for ion cyclotron wave growth during storm times: PLASMA-BASED PROXY FOR EMIC WAVES AT GEOSYNCHRONOUS ORBIT journal October 2009
Storm time observations of electromagnetic ion cyclotron waves at geosynchronous orbit: GOES results: EMIC WAVES AND STORMS, GOES RESULTS journal May 2010
Radiation belt dynamics: The importance of wave-particle interactions: FRONTIER journal November 2010
A statistical study of EMIC wave-associated He + energization in the outer magnetosphere: Cluster/CODIF observations : HE journal November 2011
The role of Shabansky orbits in compression-related electromagnetic ion cyclotron wave growth: SHABANSKY ORBITS AND EMIC WAVE GROWTH journal January 2012
Global distribution of EMIC waves derived from THEMIS observations: GLOBAL DISTRIBUTION OF EMIC WAVES journal May 2012
THEMIS observations of electromagnetic ion cyclotron wave occurrence: Dependence on AE, SYMH, and solar wind dynamic pressure: THEMIS EMIC WAVE DISTRIBUTION journal October 2012
A statistical study of Pc 1-2 magnetic pulsations in the equatorial magnetosphere: 1. Equatorial occurrence distributions journal March 1992
Ion cyclotron emissions observed by the satellite Akebono in the vicinity of the magnetic equator journal March 1992
On the preferred source location for the convective amplification of ion cyclotron waves journal January 1993
Electromagnetic ion cyclotron waves stimulated by modest magnetospheric compressions journal January 1993
Hot proton anisotropies and cool proton temperatures in the outer magnetosphere journal January 1994
Decay of the magnetospheric ring current: A Monte Carlo simulation journal February 1997
Modulation of electromagnetic ion cyclotron instability due to interaction with ring current O + during magnetic storms journal January 1997
FAST/TEAMS observations of charge exchange signatures in ions mirroring at low altitudes journal June 1998
Modeling of the contribution of electromagnetic ion cyclotron (EMIC) waves to stormtime ring current erosion book January 1997
Pc 1 micropulsation activity and magnetospheric amplification of 0.2- to 5.0-Hz hydromagnetic waves journal January 1969
Relativistic electron precipitation during magnetic storm main phase journal July 1971
A statistical study of Pc 1 magnetic pulsations at synchronous orbit journal December 1976
Wave-particle interactions near Ω He + observed on GEOS 1 and 2 1. Propagation of ion cyclotron waves in He + -rich plasma journal January 1981
Wave-particle interactions near Ω He + observed on board GEOS 1 and 2: 2. Generation of ion cyclotron waves and heating of He + ions journal January 1982
Ray tracing of ULF waves in a multicomponent magnetospheric plasma: Consequences for the generation mechanism of ion cyclotron waves journal January 1982
Effects of energetic heavy ions on electromagnetic ion cyclotron wave generation in the plasmapause region journal January 1984
Ground-satellite study of a Pc 1 ion cyclotron wave event journal January 1989
The ionospheric signatures of flux transfer events and solar wind dynamic pressure changes journal January 1990
Cyclotron instabilities and electromagnetic emission in the ultra low frequency and very low frequency ranges journal January 1965
Limit on stably trapped particle fluxes journal January 1966
Determining the mechanism of cusp proton aurora journal April 2013
An experimental test of the electromagnetic ion cyclotron instability within the earth’s magnetosphere journal January 1980

Cited By (3)

Test of Ion Cyclotron Resonance Instability Using Proton Distributions Obtained From Van Allen Probe-A Observations journal August 2018
EMIC Wave Properties Associated With and Without Injections in The Inner Magnetosphere journal March 2019
Storm Time EMIC Waves Observed by Swarm and Van Allen Probe Satellites journal January 2019

Figures / Tables (8)

Figure 1(p. 46)figure Figure 1
Figure 2(p. 47)figure Figure 2
Figure 3(p. 47)figure Figure 3
Figure 4(p. 48)figure Figure 4
Figure 5(p. 48)figure Figure 5
Figure 6(p. 48)figure Figure 6
Figure 7(p. 50)figure Figure 7
Table 1(p. 50)table Table 1

Similar Records

The occurrence and wave properties of H⁺-, He⁺-, and O⁺-band EMIC waves observed by the Van Allen Probes
Journal Article · Sat Sep 26 00:00:00 EDT 2015 · Journal of Geophysical Research. Space Physics · OSTI ID:1221606
Oxygen torus and its coincidence with EMIC wave in the deep inner magnetosphere: Van Allen Probe B and Arase observations
Journal Article · Mon Aug 03 00:00:00 EDT 2020 · Earth, Planets and Space (Online) · OSTI ID:1804382
In situ evidence of the modification of the parallel propagation of EMIC waves by heated He+ ions
Journal Article · Thu Jul 14 00:00:00 EDT 2016 · Journal of Geophysical Research. Space Physics · OSTI ID:1473808

Related Subjects

58 GEOSCIENCES
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
EMIC waves
Linear theory
Van Allen Probes
Wave generation