Regional and coastal long-term sea level change assessment from geodetic data
Event: 2015 Ocean Surface Topography Science Team Meeting
Session: Science I: Mean sea level monitoring: how to reconcile altimetry, tide gauges, land motion and other in situ observations?
Presentation type: Type Poster
Contribution: PDF file
We assess here in a regional study the quality of the Fundamental Climate Data Record (FCDR) and ECV over the German Bight and the Mediterranean Sea. Reliable and long time-series of in-situ stations exist in the two regions. The results from the various observing systems (altimetry, tide gauges, GNSS stations) are compared and their uncertainties are quantified.
The first objective is to extract the long-term climate signal and its error in open sea and coastal zone. Altimeter data are validated against geodetic-referenced in-situ data, referred to the Earth’s reference ellipsoid GRS80 via the Global Navigation Satellite System (GNSS).
In the second part we combine satellite gravity measurements from GRACE, models and climatic data and assess the basin averaged altimeter-derived sea level change and its error in the Mediterranean Sea.
The study highlight the importance of multidisciplinary studies to understand and discriminate causes of current sea level changes integrating the various factors that interfere at local scale (as climatic component, atmospheric and oceanographic processes, ground subsidence, etc.).