atmo-, atm- +

(Greek: vapor, steam; air, gas; respiration)

atmospheric composition (s) (noun), atmospheric compositions (pl)
The chemical constituents and abundance in the earth's atmosphere of its constituents, including nitrogen, oxygen, argon, carbon dioxide, water vapor, ozone, neon, helium, krypton, methane, hydrogen, and nitrous oxide.
atmospheric condensation (s) (noun), atmospheric condensations (pl)
The transformation of water in the air from a vapor phase to dew, fog, or a cloud.
atmospheric control (s) (noun), atmospheric controls (pl)
Any device or system designed to operate movable aerodynamic control surfaces to direct a guided missile in an atmosphere dense enough for such controls to be effective and the control provided by such devices.
atmospheric convection current (s) (noun), atmospheric convection currents (pl)
The vertical movement of air currents resulting from temperature variations.
atmospheric cooler (s) (noun), natural-draft cooler; atmospheric coolers, natural-draft coolers (pl)
1. In mechanical engineering, a cooler for fluids that uses air circulation obtained by natural convection to cool certain hot, fluid-filled tubes.
2. A fluids cooler that utilizes the cooling effect of ambient air surrounding hot, fluids-filled tubes.
atmospheric corrosion (s) (noun), atmospheric corrosions (pl)
The gradual destruction or alteration of a metal or alloy by contact with substances present in the atmosphere; such as, oxygen, carbon dioxide, water vapor and sulfur, and chlorine compounds.
atmospheric density (s) (noun), atmospheric densities (pl)
The ratio of the mass of a portion of the atmosphere to the volume it occupies.
atmospheric diffusion (s) (noun), atmospheric diffusions (pl)
The exchange of fluid parcels between regions in the atmosphere in the apparently random motions of a scale too small to be treated by the equations of motion.
atmospheric dispersion (s) (noun), atmospheric dispersions (pl)
The spreading of a star image into a small spectrum as its light travels through the earth's atmosphere.

The atmosphere acts in the same way as a glass prism. The path the light takes depends to a small extent on its wavelength.

As a result, the blue light from a star seems to come from slightly closer to the zenith than the red light.

atmospheric distillation (s) (noun), atmospheric distillations (pl)
1. A refining process in which crude oil components are separated at atmospheric pressure by heating to temperatures of about 600-750°F and the subsequent condensing of the fractions by cooling.
2. In chemical engineering, a distillation operation conducted at atmospheric pressure, in contrast to vacuum distillation or pressure distillation.
atmospheric disturbance (s) (noun), atmospheric disturbances (pl)
1. Any agitation or disruption of the atmospheric steady state.
2. Any interruption of a state of equilibrium of the atmosphere.
3. An area showing signs of a developing cyclonic circulation.
4. A periodic disturbance in the fields of atmospheric variables (like surface pressure or geopotential height, temperature, or wind velocity) which may either propagate (traveling wave) or not (stationary wave).

Atmospheric waves range in spatial and temporal scale from large-scale planetary waves (Rossby waves or giant meanders, twists and turns, in high-altitude winds that are a major influence on weather) to minute sound waves.

atmospheric drag (s) (noun), atmospheric drags (pl)
1. A major perturbation (disturbance and trouble) of the close artificial satellite orbits caused by the resistance of the atmosphere; the secular effects are decreasing eccentricity, semidiameter (apparent radius of a celestial body when viewed as a disk from the earth), and period.
2. A critical perturbation of the orbits of closely adjacent low-orbit artificial satellites due to atmospheric resistance; the effects extending over ages of time are semidiameter, period, and decreasing eccentricity.
atmospheric duct (s) (noun), atmospheric ducts (pl)
1. In geophysics, a layer of the troposphere in which refractive properties are such as to trap a large proportion of certain high frequency radiations.
2. A stratum of the troposphere within which the refractive index varies so as to confine within he limits of the stratum the propagation of an abnormally large proportion of any radiation of sufficiently high frequency, as in a mirage.

Atmospheric ducting is a mode of propagation of electromagnetic radiation, usually in the lower layers of the earth’s atmosphere, where the waves are bent by atmospheric refraction.

atmospheric electric field (s) (noun), atmospheric electric fields (pl)
1. The atmosphere's electric field strength in volts per meter at any specified point in time and space; near the earth's surface, in fair-weather areas.

A typical datum is about 100 and the field is directed vertically in such a way as to drive positive charges downward.

2. A quantitative term indicating the electric field strength of the atmosphere at any specified point in space and time.
3. A measure, in volts per meter, of the electrical energy in a given portion of the earth's atmosphere at a given time.
atmospheric electricity (usually singular) (noun), atmospheric electricities (pl)
1. The electrical processes occurring in the lower atmosphere, including both the intense local electrification accompanying storms and the much weaker fair-weather electrical activity over the entire globe produced by the electrified storms continuously in progress.
2. The study of electrical processes occurring within the atmosphere.
3. Electrical phenomena, regarded collectively, that occur in the earth's atmosphere.

These phenomena include not only such striking manifestations as lightning and St. Elmo's fire, but also less noticeable but more ubiquitous effects; such as, atmospheric ionization, the air–earth currents, and other quiescent electrical processes.

The existence of separated electric charges in the atmosphere is a consequence of many minor processes; such as, spray electrification, dust electrification, etc. and a few major processes including, cosmic-ray ionization, radioactive-particle ionization, and thunderstorm electrification.

The maintenance of the prevailing atmospheric electric field is now widely believed to be due to thunderstorm effects.

Cross references of word groups that are related, directly or indirectly, to: "air, wind": aello-; aeolo-; aero-; anemo-; austro-; flat-, flatu-; phys-; pneo-, -pnea; pneumato-; turb-; vent-; zephyro-.