Simultaneous entry of oxygen ions originating from the Sun and Earth into the inner magnetosphere during magnetic storms

Details Simultaneous entry of oxygen ions originating from the Sun and Earth into the inner magnetosphere during magnetic storms Simultaneous entry of oxygen ions originating from the Sun and Earth into the inner magnetosphere during magnetic storms

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm11a1541e&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM11A-1541

Physics

[2720] Magnetospheric Physics / Energetic Particles: Trapped, [2730] Magnetospheric Physics / Magnetosphere: Inner, [2778] Magnetospheric Physics / Ring Current, [2788] Magnetospheric Physics / Magnetic Storms And Substorms

Scientific paper

It is well known that low-charge-state oxygen ions are enhanced in the inner magnetosphere during magnetic storms. Here, we show the observation that high-charge-state O ions are also enhanced limitedly in the inner magnetosphere during magnetic storms. Data simultaneously collected from the ACE, Geotail, and Polar satellites indicate the following: (1) In the inner magnetosphere (at L = 3 - 5), the number density of high-charge state O ions was increased during the early phase of magnetic storms (Polar). (2) No corresponding enhancements were identified in the number density of O ions observed in the solar wind (ACE) and the near-Earth magnetotail (Geotail). (3) The number density of high-charge-state O ions present in the near-Earth magnetotail was considerably lower than in the solar wind and the inner magnetosphere. After calculating trajectories of O6+ ions under electric and magnetic field models, we found that the O6+ ions that became observable in the energy window of Polar were transported from the high-latitude magnetopause to the inner magnetosphere when the convection electric field was strong. When the convection electric field was weak, the ions were reflected toward the distant tail. The O6+ ions that became observable in the energy window of Geotail were sufficiently transported from the low-latitude magnetopause to the near-Earth magnetotail regardless of the strength of the convection electric field. The observational facts may be adequately explained in terms of ion transport paths depending on the convection electric field with different entry points. Polar observation shows that low-charge-state O ions are found in the low energy domain whereas high-charge-state O ions in the high energy domain. Occasionally, H ions show a double-hump structure in an energy spectrogram taken in the inner magnetosphere, suggesting that the H ions also come from the two different sources, that is, the Earth and Sun. We discuss the entry and transport process of the H, He, and O ions in the inner magnetosphere.

Affiliated with

Also associated with

No associations

Rating

Simultaneous entry of oxygen ions originating from the Sun and Earth into the inner magnetosphere during magnetic storms does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Simultaneous entry of oxygen ions originating from the Sun and Earth into the inner magnetosphere during magnetic storms, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simultaneous entry of oxygen ions originating from the Sun and Earth into the inner magnetosphere during magnetic storms will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1877441