On the basis of all available tide gauge records, bathythermograma, and Nansen bottle casts, we have compiled, on a global scale, monthly departures of recorded and steric sea levels from their annual means. The steric fluctuation is defined in terms of the seasonal fluctuation in specific volume. The results are given in the appendices and in three charts, together with error estimates. In general, the departures are comfortably above the uncertainties introduced by year to year variations and by the effects of local topography....
Pattullo, June, Walter Munk, Roger Revelle, and Elizabeth Strong. 1955. "The seasonal oscillation in sea level." Journal of Marine Research 14, (1). https://elischolar.library.yale.edu/journal_of_marine_research/826