| Section A | A index | 251-259 of 917 terms |
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aerological table—(Obsolete.) A table used for compiling aerological observations from upper-air soundings. Upper-air sounding observations are presently calculated and compiled by computer programs.
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aerology—1. The study of the free atmosphere throughout its vertical extent, as distinguished from studies confined to the layer of the atmosphere adjacent to the earth's surface. 2. (Obsolete.) As officially used by the U.S. Navy until 1957, same as meteorology.
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aeronautical climatology—The application of the data and techniques of climatology to aviation meteorological problems.
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aeronautical meteorological station—Station designated to make observations and issue meteorological reports for use in international air navigation.
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aeronautical meteorology—(Or aviation meteorology.) Very generally, meteorology as applied to the effects of weather upon aviation.
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aeronomy—A term denoting the physics and chemistry of the upper atmosphere. It is concerned with upper-atmospheric composition (i.e., nature of constituents, density, temperature, etc.) and chemical reactions.
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aerosol size distribution—The amounts of different size particles of solids or liquids that are suspended in air as an aerosol. Particle size affects scattering of sunlight (see Rayleigh scattering and Mie scattering) that makes blue skies, white clouds, and hazy smog, and that affects visibility. Size affects the nucleation capability of particles to form cloud droplets due to both the curvature effect and the solute effect. Relative amounts of different particle sizes can be used as a tracer for an air mass, such as indicating whether it originated over continents, oceans, urban areas, or rural areas. The total abundance of particles is often proportional to the total number density of cloud droplets, which affects the size to which these droplets can grow and their resulting evolution.
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