Temporal/spatial evolution of merging at the dayside magnetopause: Polar observations and comparison to MHD simulation results

Details Temporal/spatial evolution of merging at the dayside magnetopause: Polar observations and comparison to MHD simulation results Temporal/spatial evolution of merging at the dayside magnetopause: Polar observations and comparison to MHD simulation results

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sm51b04m&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SM51B-04

Physics

2724 Magnetopause, Cusp, And Boundary Layers, 2736 Magnetosphere/Ionosphere Interactions, 2740 Magnetospheric Configuration And Dynamics, 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

The precession of Polar's apogee toward the equator provided opportunities in March and April, 2000 for the satellite to execute south-to-north skimming orbits along the dayside magnetopause. With the spacecraft in or adjacent to the magnetopause current layer for long periods at relatively low latitudes, particle and field measurements provide new perspectives concerning the temporal evolution of merging locations. This presentation focuses on data acquired during a 16 April pass. The last closed field line was tilted toward the IMF orientation as Polar entered the current sheet, similar to recent simulations [Maynard et al., 2001]. Initially BY was positive, and plasma flow along the magnetopause was toward dawn, placing the spacecraft north of the separator line. Outside the center of the magnetopause current layer the clock angle of the magnetic field measured at Polar closely tracked variations of the IMF clock angle. As BY reversed from positive to negative polarity local minima in the magnetic field and accelerated magnetosheath ions indicate that the merging site temporarily approached the spacecraft at low latitudes. Merging returned to high-latitude locations as BY again became the dominant component. We compare in situ data with predictions of MHD simulations and with dayside convection measurements by SuperDARN radars to place point measurements by Polar into large scale contexts and specify ionospheric convection responses to the time-varying inputs.

Affiliated with

Also associated with

No associations

Rating

Temporal/spatial evolution of merging at the dayside magnetopause: Polar observations and comparison to MHD simulation results 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 Temporal/spatial evolution of merging at the dayside magnetopause: Polar observations and comparison to MHD simulation results, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Temporal/spatial evolution of merging at the dayside magnetopause: Polar observations and comparison to MHD simulation results will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1278241