The Earth From the Air

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Large format versions of many of the photographs have also been exhibited in various cities. In London they were on display outside the Natural History Museum; and were subsequently exhibited outside City Hall for most of 2005, together with a giant world map on the ground showing where each photograph was taken. St. Fleur, Nicholas (19 May 2017). "Spotting Mysterious Twinkles on Earth From a Million Miles Away". The New York Times . Retrieved 20 May 2017. The relative concentration of gases remains constant until about 10,000m (33,000ft). [17] Stratification Earth's atmosphere. Lower four layers of the atmosphere in three dimensions as seen diagonally from above the exobase. Layers drawn to scale, objects within the layers are not to scale. Aurorae shown here at the bottom of the thermosphere can actually form at any altitude in this atmospheric layer. Detlev Möller: Luft: Chemie, Physik, Biologie, Reinhaltung, Recht. Walter de Gruyter, 2003, ISBN 3-11-016431-0, S. 173. (View in Google Books). For more than 40 years now, Yann has travelled the world, worked on numerous subjects and become an actor committed to the protection of our planet.

Earth From The Air ideas | aerial photography, birds eye 39 Earth From The Air ideas | aerial photography, birds eye

This layer is mainly composed of extremely low densities of hydrogen, helium and several heavier molecules including nitrogen, oxygen and carbon dioxide closer to the exobase. The atoms and molecules are so far apart that they can travel hundreds of kilometres without colliding with one another. Thus, the exosphere no longer behaves like a gas, and the particles constantly escape into space. These free-moving particles follow ballistic trajectories and may migrate in and out of the magnetosphere or the solar wind. Every second, the Earth loses about 3kg of hydrogen, 50g of helium, and much smaller amounts of other constituents. [24] The planetary boundary layer is the part of the troposphere that is closest to Earth's surface and is directly affected by it, mainly through turbulent diffusion. During the day the planetary boundary layer usually is well-mixed, whereas at night it becomes stably stratified with weak or intermittent mixing. The depth of the planetary boundary layer ranges from as little as about 100 metres (330ft) on clear, calm nights to 3,000m (9,800ft) or more during the afternoon in dry regions. Mayor of London, Ken Livingston, opens the Earth from the Air exhibition, talking with Photographer Yann Arthus-Bertrand and Exhibition Director Chris Bridge.

The refractive index of air is close to, but just greater than 1. Systematic variations in the refractive index can lead to the bending of light rays over long optical paths. One example is that, under some circumstances, observers on board ships can see other vessels just over the horizon because light is refracted in the same direction as the curvature of Earth's surface. Different molecules absorb different wavelengths of radiation. For example, O 2 and O 3 absorb almost all radiation with wavelengths shorter than 300 nanometres. Water (H 2O) absorbs at many wavelengths above 700nm. When a molecule absorbs a photon, it increases the energy of the molecule. This heats the atmosphere, but the atmosphere also cools by emitting radiation, as discussed below. The free outdoor exhibition is a spectacular presentation of over 120 large-scale aerial photographs of breathtaking views of our planet taken by world-famous photographer Yann Arthus-Bertrand.

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The refractive index of air depends on temperature, [49] giving rise to refraction effects when the temperature gradient is large. An example of such effects is the mirage. From the age of 17 he became involved in the movie industry. He gave up the movie industry in 1967 to run the Château de Saint Augustin wildlife park in Château sur Allier (centre of France). He then left the country with his wife Anne when he was 30 (1976) to live in Kenya in the Massai Mara national park. He lived amongst the Massai tribe for 3 years to study the behaviour of a lions’ family and took daily pictures of them during those years. He thus discovered a new passion for photography and the beauty of landscapes when observed from above in hot air balloons. He understood the power of a picture and how to communicate using this means.The stratosphere is the second-lowest layer of Earth's atmosphere. It lies above the troposphere and is separated from it by the tropopause. This layer extends from the top of the troposphere at roughly 12km (7.5mi; 39,000ft) above Earth's surface to the stratopause at an altitude of about 50 to 55km (31 to 34mi; 164,000 to 180,000ft). Earth's early atmosphere consisted of gases in the solar nebula, primarily hydrogen. The atmosphere changed significantly over time, affected by many factors such as volcanism, life, and weathering. Recently, human activity has also contributed to atmospheric changes, such as global warming, ozone depletion and acid deposition. The three major constituents of Earth's atmosphere are nitrogen, oxygen, and argon. Water vapor accounts for roughly 0.25% of the atmosphere by mass. The concentration of water vapor (a greenhouse gas) varies significantly from around 10 ppm by mole fraction in the coldest portions of the atmosphere to as much as 5% by mole fraction in hot, humid air masses, and concentrations of other atmospheric gases are typically quoted in terms of dry air (without water vapor). [11] :8 The remaining gases are often referred to as trace gases, [12] among which are other greenhouse gases, principally carbon dioxide, methane, nitrous oxide, and ozone. Besides argon, already mentioned, other noble gases, neon, helium, krypton, and xenon are also present. Filtered air includes trace amounts of many other chemical compounds. Many substances of natural origin may be present in locally and seasonally variable small amounts as aerosols in an unfiltered air sample, including dust of mineral and organic composition, pollen and spores, sea spray, and volcanic ash. Various industrial pollutants also may be present as gases or aerosols, such as chlorine (elemental or in compounds), fluorine compounds and elemental mercury vapor. Sulfur compounds such as hydrogen sulfide and sulfur dioxide (SO 2) may be derived from natural sources or from industrial air pollution. Atmospheric Temperature Trends, 1979–2005: Image of the Day". Earthobservatory.nasa.gov. 2000-01-01 . Retrieved 2014-06-10. a b "Trends in Atmospheric Methane", Global Greenhouse Gas Reference Network, NOAA, 2019 , retrieved 2019-05-31