Credit & Copyright: Todd Sladoje
Explanation:
Why would clouds appear to be different colors?
The reason here is that ice crystals in distant cirrus clouds are acting like little
floating
prisms.
Sometimes known as a fire rainbow for its flame-like appearance, a
circumhorizon arc lies
parallel to the horizon.
For a circumhorizontal arc
to be visible,
the Sun must be at least 58 degrees high in a sky where
cirrus clouds are present.
Furthermore, the numerous, flat,
hexagonal ice-crystals
that compose the
cirrus cloud must be
aligned horizontally
to properly
refract sunlight in a collectively
similar manner.
Therefore, circumhorizontal arcs are quite unusual to
see.
This circumhorizon display was photographed through a
polarized
lens above
Dublin,
Ohio in 2009.
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 |
Январь Февраль Март Апрель Май Июнь Июль Август Сентябрь Октябрь Ноябрь Декабрь |
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Публикации с ключевыми словами:
clouds - облака
Публикации со словами: clouds - облака | |
См. также:
Все публикации на ту же тему >> |