Аннотация:This study is devoted to the determination of the admittance coefficients determining the Earth rotational response to zonal tide components. In contrast of the former kindred studies, it both addresses the discrepancy of the results brought by various EOP series and the hydro-atmospheric corrections to be applied on LOD. It forwards the complementary corrections brought by the ocean, the land water and sea level changes. Removing the atmospheric-oceanic excitation from LOD allows to much better constraint the admittance complex coefficients than applying the atmospheric correction only. The role of land water and associated sea level variation is notable at the semi-annual period. This study also aims at synthesising scattered theoretical results pertaining to the modelling of the length of variation caused by zonal tides and concurrent effect of the mass transports taking place in the surface fluid layer.