Halo Group of optical phenomena, in the form of rings, arcs, pillars or bright spots around the Sun or Moon, produced by the refraction or reflection of light by ice crystals suspended in the atmosphere (Cirrus clouds, diamond dust, etc.) ...
A halo is a ring of light surrounding the sun or moon. Most halos appear as bright white rings but in some instances, the dispersion of light as it passes through ice crystals found in upper level cirrus clouds can cause a halo to have color.
The 46 degree Solar Halo the sun's rays are refracted from side to top as the rays pass through the ice crystal.
A 46 degree halos is rarer than a 22 degree halo.
Halo
A ring or arc that encircles the sun or moon when seen through an ice crystal cloud or a sky filled with falling ice crystals. Halos are produced by refraction and reflection of light through the ice crystals.
HALO
The ring of light that seems to encircle the sun or moon when veiled by cirrus clouds. To produce this phenomena, the ice crystals must be in a heterogeneous arrangement to refract the sunlight.
Halo - a type of atmospheric optical phenomena which appears as a colored or whitish ring or arc of light that seems to encircle the sun or moon when viewed through an ice crystal cloud ...
Halo
Any of a variety of bright circles or arcs centered on the sun or moon, ...
Halo: A ring or arc of coloured or white light that encircles the sun or moon when seen through a cloud of ice crystals. Halos are produced by the refraction of light. The most commonly observed halo forms at a 22 degrees radius from the sun/moon.
Halo - permalink - collapse
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Any of a variety of bright circles or arcs centered on the sun or moon, ...
halo: a ring of light that appears to encircle the sun or moon. This occurs when the light from the sun or moon shines through cirrus clouds.
Halo - In ages past, the huge rings or haloes around the sun or the moon were thought to portend everything from storms to great personal disasters.
halo—A prismatically colored or whitish circle or arcs of a circle with the sun or moon at its center; coloration, if not white, is from red inside to blue outside (opposite that of a corona); ...
Halo- A ring or arc that encircles the sun or moon. Halos are caused by the refraction of light through the ice crystals in cirrus clouds.
Hard Freeze- freeze where vegetation is killed and the ground surface is frozen solid.
Halo - A narrow whitish ring of large diameter centered around the Sun. The commonly observed 22° halo subtends an angle of 22° from the observer.
Heat - The kinetic energy of random molecular motion.
90° halo"Same as Hevel's halo.
NAAQS"Abbreviation for National Ambient Air Quality Standards.
NACA Standard Atmosphere"See standard atmosphere.
Halo- A ring or arc of light around the sun or moon that is caused by ice crystals in the atmosphere.
Haze- Particles or fine dust suspended in the air that produce limited visibility.
HALO - A circle or arc containing the primary colors of the light source, such as the sun, caused by the refraction of different wavelenghts of the source light off particles or droplets suspended in a medium.
halo (optical phenomenon)
haze
heat
(heat budget: see) radiation budget
(heat equator: see) thermal equator
(heat lightning: see) lightning
heat wave
heating degree day (HDD) ...
CORONA A pastel halo around the moon or sun created by the diffraction of water droplets. The droplets in the cloud, such as cirrostratus, and the cloud layer itself must be almost perfectly uniform in order for this phenomena to occur.
Because the particles are fairly widely dispersed, this usually results in relative transparency and whiteness, often producing a halo phenomena not observed in other clouds forms.
Paraselene A weakly colored lunar halo identical in form and optical origin to the solar parhelion.
CirrostratusA cloud of a class characterized by a composition of ice crystals and often by the production of halo phenomena and appearing as a whitish and usually somewhat fibrous veil, ...
The sun is usually visible and may cause halo phenomena. Ice fog is rare at temperatures warmer than -30°C, ...
cirrostratusA cloud belonging to a class characterized by a composition of ice crystals and often by the production of halo phenomena.
cirrostratus - (Abbreviated Cs.) A principal cloud type (cloud genus), appearing as a whitish veil, usually fibrous but sometimes smooth, that may totally cover the sky, and that often produces halo phenomena, either partial or complete.
A cloud of a class characterized by a composition of ice crystals and often by the production of halo phenomena and appearing as a whitish and usually somewhat fibrous veil, ...
Mist- very fine water droplets at ground level that occur in air with a ><><><><><>Monsoon- a seasonal change in wind direction bringing dry air or heavy rain.
MSL- Mean sea level.
Corona (optic) A series of colored rings concentrically surrounding the disk of the sun or moon. Smaller than the halo, the corona is caused by the diffraction of light around small water droplets of uniform size.
Cirrostratus
High level, transparent sheet or white veil, not rippled like cirrocumulus. Causes a halo (ring) to form around the sun.
Cirrostratus A high cloud appearing as a whitish veil that may totally cover the sky. Often produces halo phenomena.
procedure and standards of observing, with individual chapters relating to the principal elements to be observed, e.g. clouds, visibility, weather, wind etc. A useful section on observing and recording special optical phenomena, e.g. halo, ...
a large halo closely circles the sun or moon shining through cirrostratus
cirrocumulus (high altitude puffy clouds)
often form in a patchwork or ripples, but the clouds are/look smaller than altocumulus ...
 See also: Cloud, High, Air, Light, Surface
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