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from barystatic sea-level variations according to the terrestrial and atmospheric mass budget
produced by IERS Associated Product Centre Deutsches GeoForschungsZentrum GFZ Potsdam

Author: M. Thomas ( R. Dill ( H. Dobslaw (
Affiliation: Deutsches GeoForschungsZentrum GFZ Dep. 1: Geodesy and Remote Sensing Sec. 1.3: Earth System Modelling Telegrafenberg 14473 Potsdam, Germany

GFZ provides these data as Associated Product Centre by order of the International Earth Rotation and Reference System Service (IERS). The data is public availably without any warranty of any kind what so ever, either express or implied, including warranties of merchantability. GFZ shall not be liable for incidental, consequential, or special consequences arising out of the use of this data.

Atmospheric models, oceanic models, hydrological models together do generally not conserve their global mass. Especially most oceanic models keep their own mass constant and do not consider the mass exchange with atmosphere and land. The barystatic sea-level variations introduced here are necessary to obtain global mass conservation. This sea-level variations are not included in the the oceanic contribution NTOL. The sum of NTAL+NTOL+HYDL+SLEL represents the surface deformation of a globally mass conserving model system.

Sea-level variations are derived by solving the sea-level equation for the total mass of terrestrial water storage and atmospheric surface pressure. The sea-level variation thus balances the continental and atmospheric mass variations to keep the total mass globally constant. In contrast to a global mean sea-level, solving the sea-level equation includes the effects of loading and self-attraction. Continental mass is taken from the global hydrological model LSDM, atmospheric mass is given by ECMWF.

please go back to the LOADING toplevel directory and have a look at /LOADING/[[404a3d6c-b758-4a01-87f4-0ada0ef8c274|README]]

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