Air composition and atmospheric pressure is not consistent throughout the atmosphere, however, and varies at different altitudes, giving the atmosphere 5 distinct principle layers. Earth's atmosphere is our natural shield against the harsh conditions of spaceincluding everything from meteors and falling satellites to deadly ultraviolet radiation from the sun. Located between about 50 and 80 kilometers (31 and 50 miles) above Earths surface, the mesosphere gets progressively colder with altitude. Much of this was unknown until a few decades ago, and scientists and engineers are using algorithms in an attempt to predict stratospheric wind patterns. Mesosphere, coldest layer of Earth's atmosphere, Thermosphere and exosphere, outermost shells of Earths atmosphere, Noctilucent clouds, ice crystals in the skimming light of the setting sun, Meteor, a space debris particle flying through the atmosphere. The cold layer also causes skin cancer and other skin conditions. Ozone molecules in the stratosphere absorb high-energy ultraviolet light from the sun and convert it into heat. It's also the layer where almost all of our weather happens. Within the mesosphere, temperature decreases with increasing height, due to decreasing absorption of solar radiation by the rarefied atmosphere and increasing cooling by CO2 radiative emission. The mesosphere The stratosphere starts just above the troposphere and extends to 50 kilometers (31 miles) high. Begin typing your search term above and press enter to search. When possible, commercial jet aircraft fly in the lower stratosphere to avoid the turbulence which is common in the troposphere, due to convection. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. This is the first and the lowest layer of Earths atmosphere. The magnetosphere turns away the charged particles emitted by the Sun, and prevents them from entering the lower layers of the atmosphere, except for the polar regions where collisions between these particles and the neutral air molecules in the mesosphere cause the polar aurorae. So those are numbers that we definitely did not have 30 years ago, and the materials and manufacturing techniques have made a big difference in that lifetime duration."

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