Variations of the atmospheric pressure changes the sea level. On large time-scales, say more than several months, the change of sea level compensates change of the atmospheric pressure so the bottom pressure remains the same. The ocean responses as an inverted barometer (IB): the higher pressure, the lower sea level. Change of the atmospheric pressure causes ocean water mass redistribution. The ocean obeys the IB model at slow motion, that corresponds to pressure changes at scales a month and longer. At smaller time scales the ocean response strongly deviates from IB model, and the full complexity of ocean dynamics (DR) should be considered. Modeling dynamic ocean (DO) response is feasible with numerical oceanic model that accounts for atmospheric forcing among other factors. Crust deformation caused by the ocean bottom pressure changes is called non-tidal ocean loading. It accounts for atmospheric pressure changes over the ocean and the DO response to that, as well as ocean repines to other forcings, excluding lunar and solar tides. We reserve the use of notion of the atmospheric pressure loading to crust deformation caused by atmospheric pressure changes over the land.
Displacement time series for download are in EPHEDISP format. File size: 227 Kb per epoch, 0.33Gb/year.
Auxiliary 3D displacements of the center mass of the total Earth
with respect to the center mass of the solid Earth without
atmosphere caused by atmospheric pressure loading. The sum of this
displacement and the displacement wrt of the total mass, is the
displacement with respect to the center of solid Earth, i.e. center
of figure.
3D gridded displacements to download are in EPHEDISP format. File size: 227 Kb per epoch, 0.33Gb/year.
The coefficients of S1 harmonic variations to download are in HARPOS format.
The coefficients of diurnal and semi-diurnal harmonic variations to download are in HARPOS format.
Auxiliary 3D displacements of the center mass of the total Earth
with respect to the center mass of the solid Earth without
atmosphere caused by atmospheric pressure loading. The sum of this
displacement and the displacement wrt of the total mass, is the
displacement with respect to the center of solid Earth, i.e. center
of figure.
The coefficients of of diurnal and semi-diurnal harmonic variations to download HARPOS format.
NB:Tidal ocean loading accounts for dynamic oceanic response. It is not recommended to use these variations and ocean loading together, since the same effect will be counted twice.
Auxiliary 3D displacements of the center mass of the total Earth
with respect to the center mass of the solid Earth without
atmosphere caused by atmospheric pressure loading. The sum of this
displacement and the displacement wrt of the total mass, is the
displacement with respect to the center of solid Earth, i.e. center
of figure.
The displacements are in NETCDF format.
Station_name X-coordinate Y-coordinate Z-coordinate
Station name should have no more than 8 characters. X,Y,Z are Cartesian coordinates of the station of interest in a crust-fixed coordinates system. Units are meters. Here is an example.
Results of on-demand computations are accessible from here.