****************************************************************************** DORISMail 29-Jul-2004 14:44:00 Message No 0334 ****************************************************************************** Author: Martine Feissel-Vernier Subject: AGU session G03: Earth Rotation Variations and Geocenter Motion Dear colleagues We are organizing a session at the AGU Fall Meeting on the topic "Earth Rotation Variations and Geocenter Motion": "Space-geodetic techniques are used to monitor precisely the Earth's rotation and the motion of its center of mass. These techniques perform observations relating terrestrial sites to extra-terrestrial objects. The motions of the terrestrial and celestial fiducial objects are modelled taking into account the knowledge of plate tectonics and deformations, solar system dynamics, quasars physics (VLBI), the Earth gravity field (SLR, DORIS, GPS) and other effects. On the other hand, the dynamics of the global fluids (atmosphere, ocean, hydrosphere, ...) is also monitored and its influence on the the observed motions can be modelled. The session topics will include the observation of these variations and motions at long as well as short timescales, the modelling involved in the analysis of observations and the effects of geophysical fluids." Please consider submitting a paper for this session. We are especially looking forward to interdisciplinary discussions. The AGU Meeting will be held 13-17 December in San Francisco. The abstract deadline is 1 September for postal submissions and 9 September for web submissions. For further information please see the website at . With our thanks Martine Feissel-Vernier and Veronique Dehant Please do not reply directly to this message, but send comments and suggestions to IDS.central.bureau@cls.fr