Some Calculations of Ocean Loading Strain Tides in Great Britain

The effect of ocean tides on earth tide measurements can be calculated by convolving ocean tidal data with surface mass loading Green's functions. Two charts of the M2 ocean tide near Great Britain are available, and convolutions have been performed with each. The calculations give the variation of ocean loading strain tides across the country, and differences between the two cases demonstrate the sensitivity of the load strain tide to variations in the tidal model. Perturbations in the strain field due to tides in more distant oceans are also calculated. Convolutions have been made for the O1 tide in local seas, but the indications are that O1 ocean load strain tides are strongly influenced by the tides in more distant oceans.