Leakage of continental hydrology in seawater mass change estimations from space
in the Mediterranean Sea and Black Sea
Fenoglio-Marc L. (1), Becker M. (1), Kusche J. (2), Rietbroek R. (2)
Institut fuer Physikalische Geodaesie, Technische Universitaet Darmstadt
Petersenstrasse 13, Germany
Telegraphenberg 326, Potsdam, Germany
The leakage of land hydrology has a sizeable effect on the oceanic mass estimated from GRACE in small ocean basins,
as the land signal is typically much larger. Its magnitude depends on the dimension of the region, on the smoothing
applied to GRACE and the type of the signal.
Hydrological models are used to correct for this leakage effect. Departures between the models may cause significant
differences in water mass change in the coastal regions.
The resulting improvement in the seawater mass estimates is evaluated by comparison with steric-corrected altimeter
basin averages. Results for the Mediterranean and the Black Sea are shown.