Physics
Scientific paper
Oct 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006jgra..11110221z&link_type=abstract
Journal of Geophysical Research, Volume 111, Issue A10, CiteID A10221
Physics
5
Magnetospheric Physics: Magnetosphere: Inner, Magnetospheric Physics: Magnetic Storms And Substorms (7954), Magnetospheric Physics: Magnetospheric Configuration And Dynamics, Magnetospheric Physics: Plasma Convection (2463), Magnetospheric Physics: Ring Current
Scientific paper
Previous studies have demonstrated that with the Medium Energy Neutral Atom instrument aboard the IMAGE spacecraft it is possible to remotely measure the ion temperature of the terrestrial magnetosphere during periods of strong geomagnetic activity. However, neutral atom imaging of the magnetosphere during quiet intervals is more difficult. In this work we show that by mapping neutral atom fluxes obtained over many days of observation to an equatorial plane fixed in geocentric solar magnetospheric coordinates, it is possible to construct neutral atom images of the quiet time magnetosphere. Enhanced neutral fluxes in the energy range of 1-70 keV/nucleon are observed in the quiet time premidnight region. A superposed-epoch analysis of multiple storm intervals also permits imaging of the ion temperature structure as a function of time through a geomagnetic storm. Using nearly 40 geomagnetic storms to produce average ion temperature maps as a function of storm phase, we find that there are significant differences between the spatial distribution of neutral fluxes and ion heating during the main phase of storms. Pronounced ion heating (up to 12 keV) is observed on the dayside during storm main phase from 5 to 8 Earth radii. During the early recovery phase, the ion temperature on the dayside drops to approximately 9 keV, and a colder region of approximately 6.5 keV persists near predawn. In the late recovery phase of the storm the ion temperature throughout the inner magnetosphere appears to relax to a nearly uniform 8 keV.
Gripper A.
Jahn Jörg-Micha
Pollock C. J.
Scime Earl E.
Sun Xiaosong
No associations
LandOfFree
Evolution of remotely measured inner magnetospheric ion temperatures during a geomagnetic storm 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 Evolution of remotely measured inner magnetospheric ion temperatures during a geomagnetic storm, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evolution of remotely measured inner magnetospheric ion temperatures during a geomagnetic storm will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-908065