Subj : ES Picture of the Day 22  2022
To   : All
From : Dan Richter
Date : Tue Mar 22 2022 12:01:00

 EPOD - a service of USRA

The Earth Science Picture of the Day (EPOD) highlights the diverse processes
and phenomena which shape our planet and our lives. EPOD will collect and
archive photos, imagery, graphics, and artwork with short explanatory
captions and links exemplifying features within the Earth system. The
community is invited to contribute digital imagery, short captions and
relevant links.


 Fallstreak Hole and Circumzenithal Arc over Hong Kong

   March 22, 2022

    1F276D7A-5F4E-4C55-9CA8-1A422AAF30EC

   Photographer:  Li Yuen Han

   Summary Authors:  Li Yuen Han;  Cadan Cummings

   The photo above features both a  fallstreak hole and
    circumzenithal arc observed from  Jordon, Hong Kong. Fallstreak
   holes, also referred to as hole punch clouds, are created when a cloud
   layer composed of  supercooled water droplets is unsettled and
   produces ice crystals. This phenomenon is often caused in cirrocumulus
   or altocumulus clouds by jet aircraft that pass through a cloud deck
   producing  turbulent air behind their wings and engines. As the ice
   crystals  nucleate, the surrounding water  evaporates and ice
   crystals slowly fall to the ground to form this unique circular hole in
   the cloud. Looking at the center of the cloud hole, one can also see a
   faint circumzenithal arc. These two phenomena are likely correlated
   because as the ice crystals accumulate in the air, they act like a
   prism and refract incoming light to produce what looks like an
   upside-down rainbow. Photo taken December 9, 2021.
     * Jordan, Hong Kong Coordinates: 22.3049, 114.1692

Related EPODs

    Fallstreak Hole and Circumzenithal Arc over Hong Kong  Cloud
   Corona and Iridescence Above Curitiba, Brazil  Iridescent Pileus
   Cloud Over Barra Grande, Brazil  Summer Convection Rain Shaft
    Thermal Inversion from the Biellese Prealps  Lenticular Clouds
   Over Rocky Mountain National Park
    More...

Cloud Links

     *  Atmospheric Optics
     *  The Cloud Appreciation Society
     *  Cloud Atlas
     *  Color and Light in Nature

-
   Earth Science Picture of the Day is a service of the  Universities
   Space Research Association.

https://epod.usra.edu
 
--- up 3 weeks, 1 day, 21 minutes
 * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (1:317/3)

.