NG21B-08:
Geodynamical studies using integrated gravity studies
Tuesday, 16 December 2014: 9:45 AM
Jose Fernandez, Instituto de Geociencias, Madrid, Spain, Kristy French Tiampo, University of Western Ontario, London, ON, Canada and John B Rundle, University of California Davis, Davis, CA, United States
Abstract:
The expansion and proliferation of new data, at regional and global scales, over the past 30 years has allowed us to measure different geophysical signals (displacement, gravity, seismicity, etc.) with unprecedented spatial resolution and precision. Here we consider observations with both terrestrial and space origin, as well as new data obtained from the fusion of both types of observations. Advances in statistical geodynamics requires improved tools for data processing, fusion, modelling and interpretation in order to obtain the maximum value from these new, large data sets, in conjunction with the development of new applications. A clear example is the space gravimetry carried out using different satellites (e.g., GRACE and GOCE) which has allowed, using the available data, the development of combined gravity models such as GGMPlus (http://geodesy.curtin.edu.au/research/models/GGMplus/), with a spatial resolution of 200 m within ±60º geographic latitude. An additional example is the use of the gravity gradients determined by the GOCE satellite to estimate the stress field and its temporal variations at global scales. Here we will present a new research project aimed at providing estimates of gravity, strain and stress at varying spatial scales, integrated using advanced techniques for statistical data assimilation.
