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Inner magnetosphere heavy ion composition during high-speed stream-driven storms

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Inner magnetosphere heavy ion composition during high-speed stream-driven storms. / Forster, David; Denton, Michael; Grande, M.; Perry, C.H.

In: Journal of Geophysical Research, Vol. 118, No. 7, 07.2013, p. 4066-4079.

Research output: Contribution to journalJournal articlepeer-review

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Forster, D, Denton, M, Grande, M & Perry, CH 2013, 'Inner magnetosphere heavy ion composition during high-speed stream-driven storms', Journal of Geophysical Research, vol. 118, no. 7, pp. 4066-4079. https://doi.org/10.1002/jgra.50292

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Forster, David ; Denton, Michael ; Grande, M. ; Perry, C.H. / Inner magnetosphere heavy ion composition during high-speed stream-driven storms. In: Journal of Geophysical Research. 2013 ; Vol. 118, No. 7. pp. 4066-4079.

Bibtex

@article{36647da6e03042e797fe3e9049ef43ef,
title = "Inner magnetosphere heavy ion composition during high-speed stream-driven storms",
abstract = " Ion composition data, taken by the Combined Release and Radiation Effects Satellite Magnetospheric Ion Composition Spectrometer instrument, are investigated across eight high-speed solar wind-stream-driven storms (HSSs) during 1991. The HSSs are identified using solar wind data from OMNI alongside geomagnetic indices, and the behavior of ions in the energy range 31.2–426.0 keV is investigated. A case study of the single HSS event that occurred on 30 July 1991 is performed, and superposed epoch analyses of five events are conducted. The data show evidence of a local minimum (dropout) in the flux and partial number density of ionic species H+, He+, He++, and O+ close to the onset of magnetospheric convection. The flux and number density rapidly fall and then recover over a period of hours. The initial rapid recovery in number density is observed to consist primarily of lower-energy ions. As the number density reaches its maximum, the ions show evidence of energization. Heavy ion-to-proton ratios are observed to decrease substantially during these HSS events.",
keywords = "Ring Current, Ions, CIR, HSS",
author = "David Forster and Michael Denton and M. Grande and C.H. Perry",
note = "{\textcopyright}2013. American Geophysical Union. All Rights Reserved.",
year = "2013",
month = jul,
doi = "10.1002/jgra.50292",
language = "English",
volume = "118",
pages = "4066--4079",
journal = "Journal of Geophysical Research",
issn = "0148-0227",
publisher = "American Geophysical Union",
number = "7",

}

RIS

TY - JOUR

T1 - Inner magnetosphere heavy ion composition during high-speed stream-driven storms

AU - Forster, David

AU - Denton, Michael

AU - Grande, M.

AU - Perry, C.H.

N1 - ©2013. American Geophysical Union. All Rights Reserved.

PY - 2013/7

Y1 - 2013/7

N2 - Ion composition data, taken by the Combined Release and Radiation Effects Satellite Magnetospheric Ion Composition Spectrometer instrument, are investigated across eight high-speed solar wind-stream-driven storms (HSSs) during 1991. The HSSs are identified using solar wind data from OMNI alongside geomagnetic indices, and the behavior of ions in the energy range 31.2–426.0 keV is investigated. A case study of the single HSS event that occurred on 30 July 1991 is performed, and superposed epoch analyses of five events are conducted. The data show evidence of a local minimum (dropout) in the flux and partial number density of ionic species H+, He+, He++, and O+ close to the onset of magnetospheric convection. The flux and number density rapidly fall and then recover over a period of hours. The initial rapid recovery in number density is observed to consist primarily of lower-energy ions. As the number density reaches its maximum, the ions show evidence of energization. Heavy ion-to-proton ratios are observed to decrease substantially during these HSS events.

AB - Ion composition data, taken by the Combined Release and Radiation Effects Satellite Magnetospheric Ion Composition Spectrometer instrument, are investigated across eight high-speed solar wind-stream-driven storms (HSSs) during 1991. The HSSs are identified using solar wind data from OMNI alongside geomagnetic indices, and the behavior of ions in the energy range 31.2–426.0 keV is investigated. A case study of the single HSS event that occurred on 30 July 1991 is performed, and superposed epoch analyses of five events are conducted. The data show evidence of a local minimum (dropout) in the flux and partial number density of ionic species H+, He+, He++, and O+ close to the onset of magnetospheric convection. The flux and number density rapidly fall and then recover over a period of hours. The initial rapid recovery in number density is observed to consist primarily of lower-energy ions. As the number density reaches its maximum, the ions show evidence of energization. Heavy ion-to-proton ratios are observed to decrease substantially during these HSS events.

KW - Ring Current

KW - Ions

KW - CIR

KW - HSS

U2 - 10.1002/jgra.50292

DO - 10.1002/jgra.50292

M3 - Journal article

VL - 118

SP - 4066

EP - 4079

JO - Journal of Geophysical Research

JF - Journal of Geophysical Research

SN - 0148-0227

IS - 7

ER -