False sunrise

False sunrise
Extremely rare False Sunrise as seen near Bologna, Italy in October 2008. Note the lake-reflection effect which is not real because there is no water in between.

A false sunrise or dawn sundog is a very particular kind of parhelion, belonging to the optical phenomenon family of halos.

It is an atmospheric optical phenomenon associated with the reflection or refraction of sunlight by small ice crystals making up cirrus or cirrostratus clouds in the very particular case when the sun is still below the horizon.

The spread light of a false sunrise has less power than that of a real sun, but sometimes is amazingly similar in its visual behaviour at distance. It is very similar to a subsun, except that in a false sunrise the sun is below the horizon and the ice crystals are above it.

See also

References

External links


Wikimedia Foundation. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • Sunrise (TV program) — Infobox Television show name = Sunrise caption = Sunrise Intertitle format = Breakfast News Program picture format = 576i (SDTV), 1080i (HDTV) runtime = 180 minutes presenter = Monday Friday Co hosts Melissa Doyle David Koch News Natalie Barr… …   Wikipedia

  • false dawn — noun : a faint light on the eastern horizon sometime before dawn; often : zodiacal light * * * zodiacal light occurring before sunrise. [1825 35] * * * false dawn noun A deceptive appearance simulating dawn (also figurative) • • • Main Entry:… …   Useful english dictionary

  • False Alarms (1936 film) — Infobox Film name = False Alarms caption = director = Del Lord writer = John Grey starring = Moe Howard Larry Fine Curly Howard Stanley Blystone June Gittelson John Grey cinematography = Benjamin H. Kline editing = Charles Hochberg producer =… …   Wikipedia

  • false dawn — zodiacal light occurring before sunrise. [1825 35] * * * …   Universalium

  • false dawn — /fɔls ˈdɔn/ (say fawls dawn) noun 1. zodiacal light appearing before sunrise. 2. a sign of promise, ultimately not realised …  

  • Sudan Sunrise — Infobox NPO organization name = Sudan Sunrise organization founded = December, 2005 by Christ Church Anglican, Overland Park, Kansas, USA location = Kansas, USA; Sudan homepage = [http://www.sudansunrise.org www.sudansunrise.org] Sudan Sunrise,… …   Wikipedia

  • Sun dog — For other uses, see Sun dog (disambiguation). Very bright sundogs in Fargo, North Dakota. Note the halo arcs passing through each sundog …   Wikipedia

  • 'N Sync in Concert — Tour by N Sync Associated album *NSYNC Start date June 11, 1998 …   Wikipedia

  • Mobile Suit Gundam SEED — Cover of the first Mobile Suit Gundam SEED …   Wikipedia

  • No Strings Attached Tour — Promotional poster for tour Tour by N Sync Associated album No Strings Attached …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”