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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.
The Nile Delta (Arabic: دلتا النيل, Delta an-Nīl or simply الدلتا, ad-Delta) is the delta formed in Lower Egypt where the Nile River spreads out and drains into the Mediterranean Sea. [1] It is one of the world's larger deltas—from Alexandria in the west to Port Said in the east; it covers 240 km (150 mi) of the Mediterranean ...
Addis Ababa (/ ˌædɪs ˈæbəbə /; [5] Amharic: አዲስ አበባ, lit. 'new flower' [adˈdis ˈabəba] ⓘ) is the capital and largest city of Ethiopia. [6][7][8] In the 2007 census, the city's population was estimated to be 2,739,551 inhabitants. [2] Addis Ababa is a highly developed [9] and important cultural, artistic, financial and ...
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 ...
Population density and elevation above sea level around the Chesapeake Bay. The Chesapeake Bay is especially vulnerable to sea level rise. The Chesapeake Bay is already experiencing the effects of climate change. Key among these is sea level rise: water levels in the bay have already risen one foot, with a predicted increase of 1.3 to 5.2 feet ...
It is an industrial and metropolitan hub, being the third most populous city in Pakistan, with an estimated population of 3.8 million in 2024. Located in central Punjab's Rachna Do'āb, between the Ravi and Chenab rivers, it is the second-largest Punjabi-speaking city in the world. Faisalabad is one of Pakistan's wealthiest and most ...
The global average sea level has risen about 250 millimetres (9.8 in) since 1880, [41] increasing the elevation on top of which other types of flooding (high-tide flooding, storm surge) occur. Many coastal cities will experience coastal flooding in the coming decades and beyond.