A rough approximation of elevation can be obtained by measuring the temperature at which water boils; in the mid-19th century, this method was used by explorers. It provides end-to-end capabilities for managing . Always refer to local authorities for the latest information. [17] Conversely, if one wishes to evaporate a liquid at a lower temperature, for example in distillation, the atmospheric pressure may be lowered by using a vacuum pump, as in a rotary evaporator. [10] The highest adjusted-to-sea level barometric pressure ever recorded (below 750 meters) was at Agata in Evenk Autonomous Okrug, Russia (6653'N, 9328'E, elevation: 261m, 856ft) on 31 December 1968 of 1083.8hPa (32.005inHg). Meteorologists describe the atmospheric pressure by how high the mercury rises.An atmosphere (atm) is a unit of measurement equal to the average air pressure at sea level at a temperature of 15 degrees Celsius (59 degrees Fahrenheit). The silvery-blue noctilucent clouds extend far above Earth's troposphere. In the late Archean Eon an oxygen-containing atmosphere began to develop, apparently produced by photosynthesizing cyanobacteria (see Great Oxygenation Event), which have been found as stromatolite fossils from 2.7 billion years ago. For example, on an overcast day when you cannot see your shadow, there is no direct radiation reaching you, it has all been scattered. Some gases in the atmosphere absorb and emit infrared radiation, but do not interact with sunlight in the visible spectrum. The lowest measurable sea-level pressure is found at the centres of tropical cyclones and tornadoes, with a record low of 870hPa (12.6psi; 26inHg). If you heat the balloon, the air pressure gets even higher. Chapter 1: Atmospheric Basics - Atmospheric Processes and Phenomena The exosphere gradually fades away into the realm of interplanetary space. [25] Although the thermosphere has a high proportion of molecules with high energy, it would not feel hot to a human in direct contact, because its density is too low to conduct a significant amount of energy to or from the skin. 0 https://en.wikipedia.org/w/index.php?title=Atmosphere_of_Earth&oldid=1151397950, Wikipedia indefinitely semi-protected pages, Articles with unsourced statements from July 2021, Articles needing additional references from October 2013, All articles needing additional references, Articles with MusicBrainz area identifiers, Creative Commons Attribution-ShareAlike License 3.0, The total ppm above adds up to more than 1 million (currently 83.43 above it) due to, Exosphere: 700 to 10,000km (440 to 6,200 miles), Thermosphere: 80 to 700km (50 to 440 miles), Stratosphere: 12 to 50km (7 to 31 miles), 99.99997% is below 100km (62mi; 330,000ft), the, This page was last edited on 23 April 2023, at 20:16.
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