摘要：The Earth is currently 180 Myr into a supercontinentcycle that began with the break-up of Pangaea and which will end around 200–250 Myr (million years) in the future, as the next supercontinent forms. Asthe continents move around the planet they change the geometry of oceanbasins, and thereby modify their resonant properties. In doing so, oceansmove through tidal resonance, causing the global tides to be profoundlyaffected. Here, we use a dedicated and established global tidal model tosimulate the evolution of tides during four future supercontinent scenarios.We show that the number of tidal resonances on Earth varies between one and five ina supercontinent cycle and that they last for no longer than 20 Myr. Theyoccur in opening basins after about 140–180 Myr, an age equivalent to thepresent-day Atlantic Ocean, which is near resonance for the dominatingsemi-diurnal tide. They also occur when an ocean basin is closing,highlighting that within its lifetime, a large ocean basin – its historydescribed by the Wilson cycle – may go through two resonances: one whenopening and one when closing. The results further support the existence of asuper-tidal cycle associated with the supercontinent cycle and gives adeep-time proxy for global tidal energetics.
