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4 天前 · Sea level rise. The global average sea level has risen about 250 millimetres (9.8 in) since 1880. [1] Between 1901 and 2018, average global sea level rose by 15–25 cm (6–10 in), an average of 1–2 mm (0.039–0.079 in) per year. [2] This rate accelerated to 4.62 mm (0.182 in)/yr for the decade 2013–2022. [3]
2 天前 · The ocean's surface is an important reference point for oceanography and geography, particularly as mean sea level. The ocean surface has globally little, but measurable topography , depending on the ocean's volumes.
- 3.688 km (2 mi)
- 1,370,000,000 km³ (328,680,479 cu mi) (97.5% of Earth's water)
- 361,000,000 km² (139,382,879 sq mi) (71% of Earth's surface area)
- List of countries by length of coastline
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3 天前 · The effect of sea level rise means that coastal fishing communities are significantly impacted by climate change, while changing rainfall patterns and water use impact on inland freshwater fisheries and aquaculture.
4 天前 · Isotopic composition shows the water present to have been derived from rain coming off Mauna Kea at higher than 2,000 m (6,600 ft) above mean sea level. The aquifer's presence is attributed to a freshwater head within Mauna Kea's basal lens.
6 天前 · The Levels are about 20 feet (6 m) above mean sea level (). The general elevation inland is 10 to 12 feet (3 to 4 m) O.D. with peak tides of 25 to 26 feet (8 to 8 m) O.D. recorded at Bridgwater and Burnham-on-Sea. [8]
2 天前 · A. ^ Height above sea level is the usual choice of definition for elevation. The point farthest away from the centre of the Earth, however, is Chimborazo in Ecuador (6,267 m (20,561 feet)). This is due to the Earth's oblate spheroid shape, with points near the Equator being farther out from the centre than those at the poles.
2 天前 · Sea level rise The global average sea level has risen about 250 millimetres (9.8 in) since 1880, increasing the elevation on top of which other types of flooding (high-tide flooding and storm surge) occur. Long-term sea level rise occurs in addition to intermittent tidal
