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 - Rideau River Pancake Ice

October 02, 2020

Rideau River Pancake Ice
We’re celebrating 20 years of Earth Science Picture of the Day during
the month of September...and more, there are just too many to fit into
30 days! 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 January 31,
2013.

Photographer: Rick Stankiewicz
Summary Author: Rick Stankiewicz
Hog’s Back Falls (officially known as the Prince of Wales Falls) is
an artificially created set of rapids on the Rideau River at
the point where the river splits from the Rideau Canal in
Ottawa, Ontario. Here the water drops about 39 ft (12 m) over a run
of about 1,970 ft (600 m). Although this particular spot along the
canal is enjoyable year-round, what caught my attention on this visit
was the back eddy of pancake ice (bottom center) in juxtaposition
to the rapids. Pancake ice typically forms from accumulations of
frazil ice in fast-flowing water. The raised rims of the icy plates
result from the swirling motion in the backwater of the falls and from
the growing ice cakes randomly bumping into each other. These floating
ice formations can range from several inches (4 cm) to several feet (1
m) across. As pictured above, they're likely several inches (1-3 cm) in
thickness. Although more commonly found on larger bodies of water such
as Arctic seas and bays, you may even discover such winter oddities in
the middle of a mid-latitude city. Photo taken on January 7, 2012.
Photo Details: Camera: Canon EOS DIGITAL REBEL XTi; Focal Length: 18mm;
Aperture: f/8.0; Exposure Time: 0.0050 s (1/200); ISO equiv: 200;
Software: Adobe Photoshop 7.0.
* Hog's Back Falls, Ontario Coordinates: 45.371021, -75.697024

Related EPODs

EPOD 20th - Rideau River Pancake Ice EPOD 20th - Lake Michigan
Ice Balls Recurrence EPOD 20th - Hair Ice EPOD 20th - Snow
Crystals In February Snowfalls EPOD 20th - Microscopic View of
Frost on Blade of Grass Archive - Avalanche Pass and Hanging Valley
More...

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

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