Atmosphere of Earth

Composition of Earth's atmosphere by volume. The lower pie represents the trace gases which together compose 0.038% of the atmosphere. The numbers are from a variety of years (mainly 1987, with CO2 and methane from 2009) and do not represent any single source. The common name given to the atmospheric gases used in breathing and photosynthesis is air. By volume, dry air contains 78.09% nitrogen, 20.95% oxygen,[1] 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases. Air also contains a variable amount of water vapor, on average around 1%. The atmosphere has a mass of about 5.15×1018 kg, three quarters of which is within about 11 km (6.8 mi; 36,000 ft) of the surface. The study of Earth's atmosphere and its processes is called atmospheric science or aerology. Composition Mean atmospheric water vapor Structure of the atmosphere Principal layers In general, air pressure and density decrease with altitude in the atmosphere. Exosphere Thermosphere Mesosphere Stratosphere Troposphere

Air (French band) Nicolas Godin studied architecture at the École Nationale Supérieure d'Architecture de Versailles, and Jean-Benoît Dunckel studied mathematics before forming a band in 1995. Before founding Air, Dunckel and Godin played together in the band Orange,[2] with others such as Alex Gopher, Xavier Jamaux and Jean de Reydellet. The former two have subsequently contributed to remixes of tracks recorded by Air. Initially Nicholas Godin was alone. Air wrote and played the music of the album 5:55 by Anglo-French actress and singer Charlotte Gainsbourg, which was released in August 2006. Air have recorded a DJ mix album, Late Night Tales: Air, for Azuli Records' Late Night Tales series. On September 18, 2006, Darkel, a solo album by Jean-Benoît Dunckel, was released. City Reading (2003) started as an idea for a collaboration with contemporary Italian writer Alessandro Baricco, known for his unusual characterizations and lyrical, poetic style. On tour, a variety of instruments are used, including:

Air (disambiguation) Air is the name given to the Earth's atmosphere. Air may also refer to: Donna Air, British actressGlen Air (born 1978), Australian rugby league player Air 1 Air 2 Air 3 Air 4 Air 5