During glacial periods, large volumes of ocean water are locked up in continental ice sheets and glaciers, lowering global sea level. Since salt is not removed with the frozen water (ice forms from relatively fresh water via evaporation-precipitation pathways), the remaining ocean water becomes more concentrated in dissolved salts, raising average oceanic salinity.
Glacial periods withdraw a significant fraction of the hydrosphere's water into land-based ice sheets, reducing the total volume of liquid seawater while the total dissolved...
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