Global warming/effects/sea level
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- How much will sea levels rise in the 21st Century?
- In 1990, the IPCC predicted a range between 0.5 and 3.0 mm per year, with 1.0 to 2.0 mm per year being the most likely range.
- The actual trend measured since then (as of 2012) is 3.2 mm/year, slightly exceeding the IPCC's worst-case projection.
- Assuming the linear trend continues, this comes to a total rise of 1/3 meter.
- The trend is expected to accelerate, however, due to increased melting of Greenland and Antarctica, and other factors.
- The most optimistic projection is currently 1 meter of rise; the most pessimistic is nearly 2 meters.