Arctic Ocean Tides from GRACE Satellite Accelerations

Because missions such as TOPEX/POSEIDON don't extend to high latitudes, Arctic ocean tidal solutions aren't constrained by altimetry data. The resulting errors in tidal models alias into monthly GRACE gravity field solutions at all latitudes. Fortunately, GRACE inter-satellite ranging data can be used to solve for these tides directly. Seven years of GRACE inter-satellite acceleration data are inverted using a mascon approach to solve for amplitudes and phases of major solar and lunar tides in the Arctic ocean. The resulting tidal amplitudes are compared to existing tidal models using in-situ data from coastal tide gauges and deep sea bottom pressure recorders. From GRACE data, relative to FES2004