Improved Marine Geoid Modelling Through Data Assimilation Using Satellite Altimetry and Model Datasets /MarGeoid/

There is an increasing demand for accurate marine geoid models for modern offshore engineering, navigation, and research applications. However, due to sparse high-quality marine gravity data, the contemporary geoid models may be erroneous up to a few decimetres, which does not satisfy the offshore industry and scientific needs. It is possible to determine marine geoid shape with a higher accuracy using satellite altimetry measurements and sea surface elevation models, whereas these data are globally available in abundance. This research aims to develop a data assimilation approach combining such geometry information with an initial gravimetric geoid solution to provide enhanced marine geoid models. The increased geoid modelling accuracy would then allow, among other applications, the utilization of advanced offshore industry technologies and improved estimation of the oceanographic processes and their change, where one of the causal factors is the warming climate.