A Data Assimilation Model of the Storm-time Ring Current

Details A Data Assimilation Model of the Storm-time Ring Current A Data Assimilation Model of the Storm-time Ring Current

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsm13a0330n&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SM13A-0330

Physics

2730 Magnetosphere: Inner, 2753 Numerical Modeling, 2778 Ring Current, 2788 Magnetic Storms And Substorms (7954), 3315 Data Assimilation

Scientific paper

Data assimilation techniques are successfully applied to atmospheric physics, physical oceanography, and ionospheric physics. There have been few attempts to model the magnetosphere with data assimilation technique mainly because of poor observational coverage. However, recent progress of observation system enables us to obtain global data of the magnetosphere with sufficient spatial coverage and time resolution. In particular, the IMAGE satellite obtains global images of the energetic neutral atom (ENA), which serve as a useful constraint on magnetospheric models. In this study, series of the IMAGE/HENA data are assimilated into a kinetic ring current model by using an ensemble-based non-linear filtering technique. We will show results that provide vital information for understanding the temporal and spatial variations of the storm-time ring current.

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