Altitude geometry definituon12/20/2023 These may range from headaches and dizziness to much more serious consequences, such as brain or lung damage. People who spend too much time in high-altitude locations risk more serious symptoms of altitude sickness. It can take days and even weeks for a body to adjust to high altitude and low air pressure. One normal effect of altitude is shortness of breath, since the lungs have to work harder to deliver oxygen to the bloodstream. Decreased air pressure means that less oxygen is available for breathing. The human body struggles in high altitudes. Air expands as it rises, and the fewer gas molecules-including nitrogen, oxygen, and carbon dioxide-have fewer chances to bump into each other. High-altitude locations are usually much colder than areas closer to sea level. This is what meteorologists and mountaineers mean by "thin air." Thin air exerts less pressure than air at a lower altitude. As altitude increases, the amount of gas molecules in the air decreases-the air becomes less dense than air nearer to sea level. Earth's gravity pulls air as close to the surface as possible. In other words, if the indicated altitude is high, the air pressure is low. This is called indicated altitude, and is measured by an instrument called an altimeter.Īs altitude rises, air pressure drops. In fact, aviators and mountaineers can measure their altitude by measuring the air pressure around them. All 1.2 million residents live about 4,150 meters (13,615 feet) above sea level.Īltitude is related to air pressure. The urban area of El Alto, Bolivia, is the highest-altitude city on Earth. Mount Everest is 8,850 meters (29,035 feet) tall. The most high-altitude point on Earth is Mount Everest, in the Himalayan mountain range on the border of Nepal and the Chinese region of Tibet. Areas are often considered "high-altitude" if they reach at least 2,400 meters (8,000 feet) into the atmosphere. Send us feedback.Altitude, like elevation, is the distance above sea level. These example sentences are selected automatically from various online news sources to reflect current usage of the word 'altitude.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. 2022 Past trials and simulations by MIT and Delta showed that 70 percent to 90 percent of all contrails could be avoided through flight and altitude adjustments. 2022 As is customary with its announcement of tests, SpinLaunch declined to release specific information about altitude or flight duration.Įric Berger, Ars Technica, 7 Oct. 2022 To speed the process up, the theory goes, a debris-clearing satellite could grab a piece of debris or dead satellite and degrade its orbit by slowing it down and dragging it to a lower altitude.īyian Mount, Fortune, 11 Oct. 2022 The burn raised the space station’s altitude by 2/10 of a mile, according to the space agency. 2022 The beloved observatory, which has spent decades revealing cosmic wonders from its perch a few hundred miles above Earth, does not have a propulsion system to maintain its altitude. 2022 But-just maybe-someone or something could help give it a boost back up to its initial altitude of 373 miles. 2022 Pilots constantly have to make adjustments to maintain speed and altitude.Ĭhris Mueller, USA TODAY, 1 Nov. Recent Examples on the Web The missiles flew about 80 miles, hitting an altitude of roughly 12 miles.ĭasl Yoon, WSJ, 5 Nov.
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