EPOD - a service of USRA

Time 2020-09-27 15:04:47

Web Name: EPOD - a service of USRA

WebSite: http://epod.usra.edu

ID:61766

Keywords:

service,EPOD,USRA,

Description:

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. 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 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, -86.020278Related LinksBeach BallsAir Photo Interpretation of Great Lakes Ice Features by E. W. MarshallMichigan in PicturesKen’s Flickr siteEPOD ArchivesPlease click on a star to cast your vote for today's image. Highest-rated EPODs are featured monthly as Viewers' Choice..

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

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