About: Cluster observations of band-limited Pc 1 waves associated with streaming H+ and O+ ions in the high-altitude plasma mantle     Goto   Sponge   Distinct   Permalink

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  • Bursts of band-limited Pc 1 waves (0.2 to similar to 1.0 Hz) with normalized frequency f/f(H+) similar to 0.5 have been observed by the Cluster spacecraft during many passes through the high-latitude plasma mantle. These transverse, left-hand polarized waves are associated with regions of H+ and O+ ions streaming away from Earth along magnetic field lines at the same velocity (similar to 140 km/s). Waves were observed only when H+ fluxes increased by factors of 10-1000 and energies of both ion species increased by factors of up to 10. We present two satellite-ground conjunctions to demonstrate the high latitude localization of these waves and their ability to reach the polar ionosphere and two extended examples of waves and associated ion distribution functions near the southern dusk flank magnetopause. We also present the results of a search for all such events during Cluster's 2002 and 2003 passages through the magnetotail, with orbital precession covering dawn to dusk on Earth's night side (June through December). A total of 46 events (band-limited Pc 1-2 waves accompanied by a sustained population of streaming H+ and O+ ions, separated by at least 12 min) were observed on 29 days. The waves were generally associated with intervals of southward IMF Bz and/or large IMF By (times of active cusp reconnection), and often but not always occurred during the main phase or early recovery phase of magnetic storms. Analysis of selected events shows that the waves are associated with large H+ temperature anisotropy, and that the waves propagate opposite to the direction of the streaming ions. A wave instability analysis using the WHAMP code confirms that the generation of these waves, via the ion cyclotron instability, is basically consistent with known physics. Their extended region of wave growth is likely, however, to reach tailward significantly beyond the Cluster orbit.
  • Bursts of band-limited Pc 1 waves (0.2 to similar to 1.0 Hz) with normalized frequency f/f(H+) similar to 0.5 have been observed by the Cluster spacecraft during many passes through the high-latitude plasma mantle. These transverse, left-hand polarized waves are associated with regions of H+ and O+ ions streaming away from Earth along magnetic field lines at the same velocity (similar to 140 km/s). Waves were observed only when H+ fluxes increased by factors of 10-1000 and energies of both ion species increased by factors of up to 10. We present two satellite-ground conjunctions to demonstrate the high latitude localization of these waves and their ability to reach the polar ionosphere and two extended examples of waves and associated ion distribution functions near the southern dusk flank magnetopause. We also present the results of a search for all such events during Cluster's 2002 and 2003 passages through the magnetotail, with orbital precession covering dawn to dusk on Earth's night side (June through December). A total of 46 events (band-limited Pc 1-2 waves accompanied by a sustained population of streaming H+ and O+ ions, separated by at least 12 min) were observed on 29 days. The waves were generally associated with intervals of southward IMF Bz and/or large IMF By (times of active cusp reconnection), and often but not always occurred during the main phase or early recovery phase of magnetic storms. Analysis of selected events shows that the waves are associated with large H+ temperature anisotropy, and that the waves propagate opposite to the direction of the streaming ions. A wave instability analysis using the WHAMP code confirms that the generation of these waves, via the ion cyclotron instability, is basically consistent with known physics. Their extended region of wave growth is likely, however, to reach tailward significantly beyond the Cluster orbit. (en)
Title
  • Cluster observations of band-limited Pc 1 waves associated with streaming H+ and O+ ions in the high-altitude plasma mantle
  • Cluster observations of band-limited Pc 1 waves associated with streaming H+ and O+ ions in the high-altitude plasma mantle (en)
skos:prefLabel
  • Cluster observations of band-limited Pc 1 waves associated with streaming H+ and O+ ions in the high-altitude plasma mantle
  • Cluster observations of band-limited Pc 1 waves associated with streaming H+ and O+ ions in the high-altitude plasma mantle (en)
skos:notation
  • RIV/68378289:_____/12:00387608!RIV13-AV0-68378289
http://linked.open...avai/predkladatel
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • I, P(GPP209/11/P848)
http://linked.open...iv/cisloPeriodika
  • A10
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
  • Grison, Benjamin
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 127483
http://linked.open...ai/riv/idVysledku
  • RIV/68378289:_____/12:00387608
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • Magnetotail boundary layers; MHD waves and instabilities; Plasma waves and instabilities; Polar cap phenomena (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • US - Spojené státy americké
http://linked.open...ontrolniKodProRIV
  • [56121E42019D]
http://linked.open...i/riv/nazevZdroje
  • Journal of Geophysical Research
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 117
http://linked.open...iv/tvurceVysledku
  • Grison, Benjamin
  • Decreau, M. E.
  • Dombeck, J.
  • Engebretson, M. J.
  • Glassmeier, K. - H.
  • Johnson, J. R.
  • Kahlstorf, C. R.G.
  • Keiling, A.
  • Kim, E. -H.
  • Lavraud, B.
  • Lessard, M. R.
  • Murr, D. L.
  • Posch, J. L.
  • Reme, H.
  • Robert, P.
http://linked.open...ain/vavai/riv/wos
  • 000309829300003
issn
  • 0148-0227
number of pages
http://bibframe.org/vocab/doi
  • 10.1029/2012JA017982
is http://linked.open...avai/riv/vysledek of
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