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International Earth Rotation and Reference Systems Service

IERS Global Geophysical Fluids Centre


The Global Geophysical Fluids Center (GGFC) was established by the International Earth Rotation and Reference Systems Service (IERS). Three operational special Bureaus (SB) have been selected, each responsible for research and data service activities pertaining to mass transports in the atmosphere, oceans, and hydrological systems. A fourth SB, related to mass changes in combined systems, e.g. atmosphere and oceans has also been created. The new Non-Operational components contains models of the core, mantle, and tides that do not change regularly.

In 2012, the GGFC issued a GGFC Call for new products and for Chair of Science Support Component (PDF, 65KB, Not barrier-free file.).

Web site:

Global Geophysical Fluids Center

Special Bureaus:


For more details about the tasks, please consult the Terms of Reference and the Call for Participation in the new IERS.

See also for more information: