Global Ocean Tides. Part VIII. The Semidiurnal Luni-Solar Declination Tide (K2), Atlas of Tidal Charts and Maps

摘要

In Part I (Schwiderski, 1978a) of this report, a unique hydrodynamical interpolation technique was introduced, extensively tested, and evaluated in order to compute partial global ocean tides in great detail and with a high degree of accuracy. This novel method has been applied to construct the semidiurnal luni-solar declination (K2) ocean tide with a relative accuracy of better than 5 cm anywhere in the open oceans. The resulting tidal amplitudes and phases are tabulated on a 1 x 1 deg grid system in an atlas of 42 x 71 deg overlapping charts covering the whole oceanic globe. A corresponding atlas of global corange and cotidal maps is included to provide the reader with a quick general overview of the major tidal phenomena. The specifying hydrodynamical parameters of the model are listed along with quoted sources of empirical tide data, and significant tidal features are explained and discussed. As expected, since the periods of the semidiurnal K2 (11.97 h) and S2 (12.00 h) tides differ by only 0.03 h, these two tides are almost copies of each other (compare Part III). Some differences occur only in areas with rapid tidal variations. (Author)