Evolution of a staircase ion signature observed by Cluster in the polar cusp

Details Evolution of a staircase ion signature observed by Cluster in the polar cusp Evolution of a staircase ion signature observed by Cluster in the polar cusp

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsm23c..02e&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SM23C-02

Physics

2463 Plasma Convection (2760), 2706 Cusp, 2776 Polar Cap Phenomena, 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

We use the Cluster string of pearl configuration in the mid-altitude polar cusp to investigate temporal variations of the polar cusp. On 7 Aug. 2004, Cluster 4 was moving poleward through the Northern cusp, followed by Cluster 1 about 3 min later, Cluster 2 about 9 min later and finally Cluster 3 about 18 min later. The ACE spacecraft detected a Southward IMF turning before the cusp crossings and Bz stayed negative throughout. Cluster 4 observed a staircase ion dispersion with 2 steps, a high energy one around 1 keV at low latitude and a low energy one at higher latitude. C1 around 3 min later did not observe the high energy step anymore but a dispersion with a low energy cut-off more or less continuous through the cusp. About 18 min later, C3 observed a new dispersion on the equatorward side of the cusp detached from the main cusp precipitation. The observations will be compared with the predictions from a three-dimensional magnetohydrodynamic (MHD) simulation. This event will then be discussed in term of temporal evolution of newly reconnected field lines on the equatorward side of the cusp under IMF-Bz negative.

Affiliated with

Also associated with

No associations

Rating

Evolution of a staircase ion signature observed by Cluster in the polar cusp 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 a staircase ion signature observed by Cluster in the polar cusp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evolution of a staircase ion signature observed by Cluster in the polar cusp will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-762482