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Sea surface height change from 1992 to 2019: Blue regions are where sea level has gone down, and orange/red regions are where sea level has risen (the visualization is based on satellite data). [ 2 ] 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.
The term above sea level generally refers to the height above mean sea level (AMSL). The term APSL means above present sea level, comparing sea levels in the past with the level today. Earth's radius at sea level is 6,378.137 km (3,963.191 mi) at the equator.
The current sea level is about 130 metres higher than the historical minimum. Historically low levels were reached during the Last Glacial Maximum (LGM), about 20,000 years ago. The last time the sea level was higher than today was during the Eemian, about 130,000 years ago. [2]
Tidal range is the difference in height between high tide and low tide. Tides are the rise and fall of sea levels caused by gravitational forces exerted by the Moon and Sun, by Earth's rotation and by centrifugal force caused by Earth's progression around the Earth-Moon barycenter. Tidal range depends on time and location.
sea level: 41 500 ft 150 m 38 2,405 ft 733 m Alaska [g] Denali (federally Mount McKinley) [6] [h] 1 20,310 ft 6190.5 m Gulf of Alaska, Bering Sea, and Arctic Ocean: 3 sea level: 15 1,900 ft 580 m 1 20,310 ft 6190.5 m
Established in 1985, The Global Sea Level Observing System (GLOSS) is an Intergovernmental Oceanographic Commission (IOC) program whose purpose is to measure sea level globally for long-term climate change studies. The program's purpose has changed since the 2004 Indian Ocean earthquake and the program now collects real time measurements of sea ...
sea level 63 m 207 ft Bahrain: Mountain of Smoke (Jabal ad Dukhan) 134 m 440 ft Persian Gulf: sea level 122 m 400 ft Bangladesh: Saka Haphong: 1063 m 3,488 ft Bay of Bengal: sea level 1063 m 3,488 ft Barbados: Mount Hillaby: 340 m 1,115 ft North Atlantic Ocean: sea level 336 m 1,102 ft Belarus: Dzyarzhynskaya Hara: 345 m 1,132 ft Neman: 90 m 295 ft
Pressure as a function of the height above the sea level. The human body can perform best at sea level, [7] where the atmospheric pressure is 101,325 Pa or 1013.25 millibars (or 1 atm, by definition). The concentration of oxygen (O 2) in sea-level air is 20.9%, so the partial pressure of O 2 (pO 2) is 21.136 kilopascals (158.