Abstract:Based on information on evenly distributed IGS stations, the paper selects 150 healthy IGS stations distributed in coastal areas and 29 inland IGS stations. Displacements of IGS stations caused by non-tidal ocean loading are calculated using an ocean bottom pressure grid provided ECCO, results of which are used to analyze differences of effects of non-tidal ocean loading on IGS stations between coastal and inland areas. Finally, to investigate its effects on IGS station coordinate time series, the calculated displacements are used to correct coastal IGS station time series provided by Scripps orbit and permanent array center(SOPAC). Results indicate that U components of stations in coastal areas (less than 50 km) are affected on average by 5 mm, compared to only 1 mm for inland stations. After non-tidal ocean loading correction is applied, the RMS of height time series of 71% coastal area stations are reduced, with a maximum reduction of 13%. Furthermore, non-tidal ocean loading effects along the west coasts of the Atlantic and the Pacific ocean are more obvious than along the east coasts. Considering the obvious effects in these areas, it is strongly recommended that when using station coordinate time series in west coast areas of the Atlantic and the Pacific oceans, that non-tidal ocean loading corrections must be applied.