Matches in DBpedia 2014 for { <http://dbpedia.org/resource/Circumzenithal_arc> ?p ?o. }
Showing items 1 to 55 of
55
with 100 items per page.
- Circumzenithal_arc abstract "The circumzenithal arc or circumzenith arc (CZA), also called the Bravais' arc, is an optical phenomenon similar in appearance to a rainbow; but it arises from refraction of sunlight through horizontally-oriented ice crystals, generally in cirrus clouds, rather than from raindrops. It forms no more than one-quarter of a circle centered on the zenith and on the same side as the sun. Its colors are from blue on the inside to red on the outside of the arc. It is one of the brightest and most colorful halos. Its colors are purer than those of the rainbow because there is much less color overlap in its formation. The first impression is that of an upside-down rainbow.The circumzenithal arc has been called "a smile in the sky". It is rarely noticed because it occurs so far overhead. Cirrus clouds which cause a sun dog can cause a circumzenithal arc when they reach the zenith, if the Sun is low in the sky.The light that forms the CZA enters an ice crystal through its flat top face, and exits through a side prism face. The refraction of almost parallel sunlight through what is essentially a 90-degree prism accounts for the wide color separation and the purity of color. The CZA can only form when the sun is at an altitude lower than 32.2°. The CZA is brightest when the sun is at 22° above the horizon, which causes sunlight to enter and exit the crystals at the minimum deviation angle; then it is also about 22° in radius, 3° in width. The CZA radius varies between 32.2° and 0° depending on the solar altitude. Towards either of the extremes it is vanishingly faint. When the sun is above 32.2°, light exits the crystals through the bottom face instead, to contribute to the almost colorless parhelic circle.".
- Circumzenithal_arc thumbnail Solar_halos_with_foreground,_Salem,_MA,_Oct_27,_2012.JPG?width=300.
- Circumzenithal_arc wikiPageExternalLink Atmospheric_Phenomena.
- Circumzenithal_arc wikiPageExternalLink CZA.html.
- Circumzenithal_arc wikiPageExternalLink folder?folder_id=646937.
- Circumzenithal_arc wikiPageExternalLink cza.htm.
- Circumzenithal_arc wikiPageExternalLink czaform.htm.
- Circumzenithal_arc wikiPageExternalLink czaim1.htm.
- Circumzenithal_arc wikiPageExternalLink czasalt.htm.
- Circumzenithal_arc wikiPageExternalLink 1-23-11.
- Circumzenithal_arc wikiPageExternalLink alberta_halos.jpg?PHPSESSID=r5vsrr742oq6aq8cmtrgt018k7.
- Circumzenithal_arc wikiPageExternalLink 654128.
- Circumzenithal_arc wikiPageID "8470584".
- Circumzenithal_arc wikiPageRevisionID "606761317".
- Circumzenithal_arc hasPhotoCollection Circumzenithal_arc.
- Circumzenithal_arc subject Category:Atmospheric_optical_phenomena.
- Circumzenithal_arc subject Category:Geometrical_optics.
- Circumzenithal_arc type AtmosphericOpticalPhenomena.
- Circumzenithal_arc type BodyPart105220461.
- Circumzenithal_arc type Eye105311054.
- Circumzenithal_arc type GeometricalOptics.
- Circumzenithal_arc type NaturalPhenomenon111408559.
- Circumzenithal_arc type OpticalPhenomenon111490638.
- Circumzenithal_arc type Organ105297523.
- Circumzenithal_arc type Part109385911.
- Circumzenithal_arc type Phenomenon100034213.
- Circumzenithal_arc type PhysicalEntity100001930.
- Circumzenithal_arc type PhysicalPhenomenon111419404.
- Circumzenithal_arc type Process100029677.
- Circumzenithal_arc type SenseOrgan105299178.
- Circumzenithal_arc type Thing100002452.
- Circumzenithal_arc comment "The circumzenithal arc or circumzenith arc (CZA), also called the Bravais' arc, is an optical phenomenon similar in appearance to a rainbow; but it arises from refraction of sunlight through horizontally-oriented ice crystals, generally in cirrus clouds, rather than from raindrops. It forms no more than one-quarter of a circle centered on the zenith and on the same side as the sun. Its colors are from blue on the inside to red on the outside of the arc.".
- Circumzenithal_arc label "Arc circumzénithal".
- Circumzenithal_arc label "Arco circuncenital".
- Circumzenithal_arc label "Circumzenitale boog".
- Circumzenithal_arc label "Circumzenithal arc".
- Circumzenithal_arc label "Zirkumzenitalbogen".
- Circumzenithal_arc label "Łuk okołozenitalny".
- Circumzenithal_arc label "Зенитная дуга".
- Circumzenithal_arc label "環天頂アーク".
- Circumzenithal_arc label "環天頂弧".
- Circumzenithal_arc sameAs Zirkumzenitalbogen.
- Circumzenithal_arc sameAs Arco_circuncenital.
- Circumzenithal_arc sameAs Arc_circumzénithal.
- Circumzenithal_arc sameAs 環天頂アーク.
- Circumzenithal_arc sameAs 천정호.
- Circumzenithal_arc sameAs Circumzenitale_boog.
- Circumzenithal_arc sameAs Łuk_okołozenitalny.
- Circumzenithal_arc sameAs m.0274n02.
- Circumzenithal_arc sameAs Q205928.
- Circumzenithal_arc sameAs Q205928.
- Circumzenithal_arc sameAs Circumzenithal_arc.
- Circumzenithal_arc wasDerivedFrom Circumzenithal_arc?oldid=606761317.
- Circumzenithal_arc depiction Solar_halos_with_foreground,_Salem,_MA,_Oct_27,_2012.JPG.
- Circumzenithal_arc isPrimaryTopicOf Circumzenithal_arc.
