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The Large-Scale Plasmaspheric Density Trough Associated With the 24 May 2000 Geomagnetic Storm: IMAGE EUV Observations and Global Core Plasma ModelingThe IMAGE EUV imager observed a plasmaspheric density, trough in association with a geomagnetically active period on 24 May 2000. In EUV, this density, trough appears as an Archimedes spiral extending from Earth's shadow to approximately 1900 MLT. We present an analysis of this density trough using simulated EUV images, Observational EUV images are subjected to edge analysis to establish the plasmapause L-shell and the location of the density trough in terms of L-shell, MLT extent, and radial width. The plasmaspheric density distribution is modeled using both static and dynamic models for the plasmasphere. The background plasmasphere is then numerically simulated using the 4-parameter plasmaspheric density model contained within the Global Core Plasma Model (GCPM) and the Dynamic Global Core Plasma Model (DGCPM). Simulated EUV images of the model plasmasphere are produced once an artificial density, depletion, matching the observed MLT extent and width, has been removed. Once the azimuthal extent and width of the trough have been simulated, the depth of the artificial density depletion is iteratively adjusted to produce simulated EUV images that approximate observation. The results of this analysis and discussion of possible origins for this density trough will be presented.
Document ID
20010039527
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Adrian, M. L.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Gallagher, D. L.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Green, J. L.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Sandel, B. R.
(Arizona Univ. Tucson, AZ United States)
Rose, M. Franklin
Date Acquired
August 20, 2013
Publication Date
January 1, 2001
Subject Category
Geophysics
Meeting Information
Meeting: American Geophysical Union 2001 Spring Meeting
Location: Boston, MA
Country: United States
Start Date: June 1, 2001
Sponsors: American Geophysical Union
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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