Sea level rise

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NASA’s Goddard Space Flight Center/PO.DAAC

Between 1901 and 2018, the average global sea level rose by 15–25 cm (6–10 in), or 1–2 mm per year.[1] This rate is increasing; sea levels are now rising at a rate of 3.7 mm (0.146 inches) per year.[2] Human-caused climate change is predominantly the cause, as it constantly heats (and thus expands) the ocean and melts land-based ice sheets and glaciers.[3] Between 1993 and 2018, thermal expansion of water contributed 42% to sea level rise (SLR); melting of temperate glaciers contributed 21%; Greenland contributed 15%; and Antarctica contributed 8%.[4]


References

  1. IPCC Report (2019) Summary for Policymakers
  2. IPCC Report (2021) Climate Change 2021: The Physical Science Basis
  3. Matthias Mengel, Anders Levermann, Katja Frieler, Alexander Robinson, Ben Marzeion, and Ricarda Winkelmann (2016) Future sea level rise constrained by observations and long-term commitment Proceedings of the National Academy of Sciences
  4. WCRP Global Sea Level Budget Group (2018) Global sea-level budget 1993–present Earth System Science Data