A Study of Steady Magnetospheric Convection Using High Latitude Magnetometers

Details A Study of Steady Magnetospheric Convection Using High Latitude Magnetometers A Study of Steady Magnetospheric Convection Using High Latitude Magnetometers

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sm32a09d&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SM32A-09

Physics

2409 Current Systems (2708), 2463 Plasma Convection, 2760 Plasma Convection, 2788 Storms And Substorms

Scientific paper

Magnetometer data from the MACCS and CANOPUS arrays in northern North America have been analyzed during two of the intervals of steady magnetospheric convection identified by the GEM community, January 29-30 and February 3-4, 1998. These intervals were characterized by extended periods of southward interplanetary magnetic field (negative IMF Bz), and by the absence of substorms. The patterns of ionospheric current flow on the dayside were found to be in general agreement with the disturbance current system, SD, originally described by Silsbee and Vestine [1942]. This indicates that during extended periods of southward IMF the convection on the dayside is the same whether or not there are substorms. When plasma flow patterns measured by the SuperDARN auroral radar network were available for comparison, these patterns agreed with the patterns inferred from magnetometers. Further study will investigate convection patterns on the nightside, and a similar study of convection for the southern high latitude region will be conducted using data from Antarctic stations.

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