EGU General Assembly 2008
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  Information - IS27 - MPRG13/G15/GD23 Small scales for potential fields - tools and models (co-organized by MPRG, G & GD)

Event Information
High-resolution modeling and analysis of potential fields are of primary importance for many geodetic and geophysical applications. During the last years, the determination of the gravity and magnetic fields has been considerably improved thanks to the constant increase of the amount of available data, from the Earth’s surface to the satellite altitude, in particular following the development of satellite and airborne techniques. This abundance and diversity of available data brings new possibilities and challenges for small scale potential fields modeling and analysis.
In this session, we would like to tackle the questions of how to compute the best possible geoid, gravity or lithospheric magnetic field, merging all available datasets, at the highest possible resolution, over an area of interest, and then, how to analyze it for geodynamic interpretation. We thus invite contributions dealing with how to combine heterogeneous datasets, at different altitudes and with proper data weightings, downward continuation aspects, approaches for local, regional or global determination of potential fields at high resolution (including new developments with localizing basis functions), how to separate external and internal fields in lithospheric magnetic field modeling, how to cope with the numerical challenges of the large amount of data and the high resolution over wide areas, particularly with a trade-off between precision and computational effort. Finally, we invite contributions on how to analyze the obtained fields for geodynamic studies at lithopheric scale. Real situations but also “ad hoc” simulations are welcome in this session.

Preliminary List of Solicited Speakers
Erwan Thebault, Institut de Physique du Globe de Paris, France
Mike Purucker, Raytheon / NASA GSFC, USA
Gwendoline Pajot, Bureau de Recherches Geologiques et Minieres BRGM, France
Artu Ellmann, Tallinn University of Technology, Estonia


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