Abstract
AbstractSea‐level changes are of wide interest because they provide information about Earth's internal structure and the sensitivity of ice sheets to climate change. Here we illustrate the sensitivity of sea level to marine sedimentary water storage by modeling sea‐level responses to a synthetic global sediment redistribution history in which rates and patterns of erosion and deposition are similar to those at present and steady in time from the Last Interglacial to present. Our simulations show that if sediment redistribution were accounted for but sedimentary water storage were neglected, modeled sea‐level changes could be overestimated by ~2 ± 1 m of global mean sea‐level equivalent, a significant fraction of published estimates of 6–9 m of global mean sea‐level change since the Last Interglacial. These results show that sedimentary water storage may significantly contribute to changes in Earth's long‐term seawater budget over >105 year timescales and underscore the importance of accounting for it in modeling long‐term sea‐level changes.
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