Solar Wind Modeling and Data Assimilation: Concept and First Results

Details Solar Wind Modeling and Data Assimilation: Concept and First Results Solar Wind Modeling and Data Assimilation: Concept and First Results

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsh53b0319m&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SH53B-0319

Physics

7843 Numerical Simulation Studies, 7894 Instruments And Techniques, 2164 Solar Wind Plasma

Scientific paper

Up to five simultaneously operating spacecraft monitored the solar wind in 1998-2000 between the L1 point and Earth (ACE, WIND, IMP 8, Geotail, and Interball-1). However, the current space weather prediction methods do not take advantage of these observations made at multiple points. Rather, a single upstream monitor is selected out of the available spacecraft, effectively assuming a completely uniform solar wind flow. We have initiated a project with an aim to assimilate all solar wind observations into the numerical 3D MHD model ENLIL in order to reconstruct the solar wind profile perpendicular to the Sun-Earth line. We present preliminary results of simplified model runs and discuss the benefits and difficulties of data assimilation in the solar wind.

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