Magnetospheric Response to Solar Wind Alfvenic Fluctuations using WSA-Enlil-LFM

Details Magnetospheric Response to Solar Wind Alfvenic Fluctuations using WSA-Enlil-LFM Magnetospheric Response to Solar Wind Alfvenic Fluctuations using WSA-Enlil-LFM

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm41a2010m&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SM41A-2010

Physics

[2753] Magnetospheric Physics / Numerical Modeling, [2784] Magnetospheric Physics / Solar Wind/Magnetosphere Interactions

Scientific paper

In the solar wind, fast streams plow into the slower solar wind causing intense magnetic field regions called Corotating Interaction Regions(CIRs) at Earth. CIRs typically generate only moderate to weak magnetic storms in the magnetosphere, but have elongated recovery phases compared to ICME induced storms. These are thought to be due, in part, to the large amplitude magnetic fluctuations of the z component of the magnetic field from Alfven waves within the interaction region and high speed streams. To investigate this relationship, we present end-to-end modeling results of the Whole Heliosphere Interval (WHI) from the Lyon-Fedder-Mobary (LFM) global, three-dimensional magnetohydrodynamic (MHD) model. These simulations are driven by predicted solar wind plasma properties from the Wang-Sheeley-Arge(WSA) Enlil model with and without idealized synthetic Alfvenic fluctuations. To simulate idealized Alfvenic fluctuations, we allow the magnetic field vector to randomly vary direction within a defined cone. Assuming anti-sunward propagation, the velocity components are then modified by the Alfven speed of the perturbed field, while holding all other solar wind driving parameters constant. We compare the global characteristics of the magnetosphere, such as its global geometry, ULF wave power, the cross-polar cap potential, and integrated field aligned currents.

Affiliated with

Also associated with

No associations

Rating

Magnetospheric Response to Solar Wind Alfvenic Fluctuations using WSA-Enlil-LFM 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 Magnetospheric Response to Solar Wind Alfvenic Fluctuations using WSA-Enlil-LFM, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetospheric Response to Solar Wind Alfvenic Fluctuations using WSA-Enlil-LFM will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1891089