 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.


 EPOD 20th - Lake Michigan Ice Balls Recurrence

   September 27, 2020

    EPOD 20th - Lake Michigan Ice Balls Recurrence
    KAScott_20140101_6598-Msn We’re celebrating 20 years of Earth
   Science Picture of the Day during the month of September! Today’s photo
   features a popular EPOD from the past. Thanks to all of our followers
   (on the blog, Facebook, Instagram and Twitter) for supporting us.
   Thanks also to all of you who’ve submitted your photos. We’re most
   appreciative. This EPOD was originally published February 4, 2014.

   Photographer:  Ken Scott
   Summary Author:  Ken Scott
    Ferbuary 2014 Viewer's Choice The photo at top shows a crop of ice
   balls just deposited from the frigid waters of  Lake Michigan during
   the  polar vortex event of January 6-8. These nearly spherical
    concretions accumulated along  Sleeping Bear Dunes National
   Lakeshore, on the northeastern shore of Lake Michigan. The ones
   featured here are somewhat smaller than the basketball-sized spheres
   that blanketed the shore  last winter.
   Ice balls form where water turbulence breaks up a layer of  slush.
    Click here for animation. Slushy ice mattes and  frazil ice
   accrete in the wind-whipped  supercooled water. The mattes
   eventually form into rounded lumps and will continue to grow until big
   waves push them on shore or until they end up in a protected inlet -
   photo at left.

   Photo Details: Camera: NIKON D600; Lens: 24.0-85.0 mm f/3.5-4.5; Focal
   Length: 28.0mm (35mm equivalent: 28mm); Aperture: f/11.0; Exposure
   Time: 3.000 s; ISO equiv: 800; Software: Photomatix Pro 5.0.
     * Sleeping Bear Dunes National Lakeshore, Michigan Coordinates:
        44.913056, -86.020278

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Cryosphere Links

     *  Guide to Frost
     *  What is the Cryosphere?
     *  Bentley Snow Crystals
     *  Glaciers of the World
     *  Ice, Snow, and Glaciers: The Water Cycle
     *  The National Snow and Ice Data Center Google Earth Images
     *  Snow and Ice Crystals

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

https://epod.usra.edu
 
