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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.
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. [43]: 1216 This was faster than the sea level had ever risen over at least the past 3,000 years. [43]: 1216 The rate accelerated to 4.62 mm (0.182 in)/yr for the decade 2013–2022. [44]
Altitude is a distance measurement, usually in the vertical or "up" direction, between a reference datum and a point or object. The exact definition and reference datum varies according to the context (e.g., aviation, geometry, geographical survey, sport, or atmospheric pressure). Although the term altitude is commonly used to mean the height ...
Height above mean sea level. Height above mean sea level is a measure of a location's vertical distance (height, elevation or altitude) in reference to a vertical datum based on a historic mean sea level. In geodesy, it is formalized as orthometric height. The zero level varies in different countries due to different reference points and ...
Sea level. This marker indicating sea level is situated between Jerusalem and the Dead Sea. Mean sea level (MSL, often shortened to sea level) is an average surface level of one or more among Earth 's coastal bodies of water from which heights such as elevation may be measured. The global MSL is a type of vertical datum – a standardised ...
Lucknow city is located in a seismic zone III. [36] Lucknow stands at an elevation of approximately 123 metres (404 ft) above sea level. The city had an area of 402 km 2 (155 square miles) until December 2019, when 88 villages were added to the municipal limits and the area increased to 631 km 2 (244 square miles).
The highest and lowest points in China constitute the greatest elevation range within any single country at 9,002 metres (29,534 ft). The elevation ranges are also great in Nepal 8,789 metres (28,835 ft), Pakistan 8,611 metres (28,251 ft), and India 8,588 metres (28,176 ft). Monaco 's elevation range is among the greatest relative to surface ...
Lake Grundlsee is situated at the southern foot of the Totes Gebirge in Austria, in the Styrian part of the Salzkammergut. It lies at an altitude of 708 m above sea level. The municipal seat of Grundlsee is located on the northwest shore. The outflow of the Grundlsee is the Grundlsee Traun, which drains into the Danube via the Traun.