30.06.2014: FB1-Seminar

11:00 h, Hörsaal, Düsternbrooker Weg 20

Abstract:

Mass redistribution within and mass exchanges among the Earth's subsystems are reflected in variations of the fundamental geodetic observables, i.e., the Earth's shape, its rotation, and its gravity and magnetic field. Since all these parameters of the Earth are precisely observed with various space- and ground-based techniques, these integral measures can principally be used to determine geophysical aspects of global change. However, due to the integral character of geodetic observations and restrictions concerning resolution in time and space, the interpretation of the data and their utilization in Earth system sciences require complementary methods from theory and modelling. By applying a modular system model approach covering transient dynamics and corresponding mass redistribution in the atmosphere-hydrosphere system it will be demonstrated how reliable information about near-surface dynamics, such as ocean mass and sea-level anomalies, hydrologic mass re-distribution, continental ice-mass changes and load-induced vertical deformations, can be derived from the global geodetic monitoring data.

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