Causes Of Sea Level Rise

Past, present, and future changes in global sea level are mainly caused by two fundamental processes: (1) the thermal expansion of existing water in the world's ocean basins as it absorbs heat and (2) the addition of water from land-based sources—mainly ice sheets and glaciers, but also other smaller sources. Geological processes (subsidence and uplift), ocean circulation changes, and other processes are important for determining local and regional rates of sea level rise, but the total volume of the world's oceans—and hence global average sea level—is essentially controlled by thermal expansion and addition of water from land-based sources.

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