Ocean Bottom Pressure Variability

Ocean Bottom Pressure (OBP) variability as observed by GRACE/GRACE-FO is an integrated signal from a number of different processes. The following individual components are available:

GRACE: Barystatic Sea-Level
Pressure variations due to mass inflow from the continents and deformations of the equipotential surface coincident with mean sea-level due to gravitational attraction of masses at the continents.

GRACE: Residual Circulation
Pressure variations due to the general ocean circulation not represented by the non-tidal de-aliasing model AOD1B.

GRACE: Continental Leakage
Apparent pressure variations along the coasts that are most likely caused by spatial leakage from the continents.

Errors: Barystatic Sea-Level
Time-variable component of the uncertainty estimate for the GRACE-based barystatic sea-level variability.

Errors: Residual Circulation
Time-variable component of the uncertainty estimate for the GRACE-based residual circulation variability.

Errors: Continental Leakage
Time-variable component of the uncertainty estimate for the GRACE-based continental leakage variability.

Model: Atmospheric Mass
Static contribution of atmospheric mass to ocean bottom pressure as represented in the non-tidal de-aliasing model AOD1B.

Model: Ocean Circulation
Dynamic ocean component of ocean bottom pressure as represented in the non-tidal de-aliasing model AOD1B.

Further information on the applied processing scheme and data products is available here as technical note.

The Level-3 OBP products are available here.

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