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

Journal Article · · Journal of Atmospheric and Solar-Terrestrial Physics
 [1]; ORCiD logo [2];  [1];  [1];  [1]; ORCiD logo [3]; ORCiD logo [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)
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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 Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE; National Aeronautics and Space Administration (NASA)
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1422963
Alternate ID(s):
OSTI ID: 1702939
Report Number(s):
LA-UR-17-23552
Journal Information:
Journal of Atmospheric and Solar-Terrestrial Physics, Vol. 177; ISSN 1364-6826
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

References (56)

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

Cited By (3)

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

Figures / Tables (8)

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Figure 7(p. 50)figure Figure 7
Table 1(p. 50)table Table 1

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Related Subjects

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