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Over geologic time sea level has fluctuated by more than 300 metres, possibly more than 400 metres. The main reasons for sea level fluctuations in the last 15 million years are the Antarctic ice sheet and Antarctic post-glacial rebound during warm periods. The current sea level is about 130 metres higher than the historical minimum.
Year 2021 IPCC estimates for the amount of sea level rise over the next 2,000 years project that: At a warming peak of 1.5 °C (2.7 °F), global sea levels would rise 2–3 m (6 + 1 ⁄ 2 –10 ft) At a warming peak of 2 °C (3.6 °F), sea levels would rise 2–6 m (6 + 1 ⁄ 2 – 19 + 1 ⁄ 2 ft)
Between 1901 and 2018, the average sea level rose by 15–25 cm (6–10 in), with an increase of 2.3 mm (0.091 in) per year since the 1970s. [16]: 1216 This was faster than the sea level had ever risen over at least the past 3,000 years. [16]: 1216 The rate accelerated to 4.62 mm (0.182 in)/yr for the decade 2013–2022. [17]
Even if mean sea levels near Sydney had dropped since 1914, that wouldn't show global sea levels had dropped during that time, according to Hague. "Sea level and its change is not uniform across ...
The rate of global sea level rise is speeding up dramatically as temperatures continue to rise due to climate change, a new report finds, and now poses “a major threat to many millions” of ...
Solid geological evidence, based largely upon analysis of deep cores of coral reefs, exists only for three major periods of accelerated sea level rise, called meltwater pulses, during the last deglaciation. The first, Meltwater pulse 1A, lasted between c. 14.6–14.3 ka and was a 13.5 m (44 ft) rise over about 290 years centered at 14.2 ka.
Sea level rises in the Pacific Ocean are outstripping the global average, a World Meteorological Organization (WMO) report showed on Tuesday, imperiling low-lying island states. Globally, sea ...
[28]: 322 At that time, mean global temperatures were about 2–4 °C (3.6–7.2 °F) warmer than pre-industrial temperatures. The global mean sea level was up to 25 metres (82 ft) higher than it is today. [29]: 323 The modern observed rise in temperature and CO 2 concentrations has been rapid. Even abrupt geophysical events in Earth's history ...