Polynya


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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Polynya

 

an area of open water in the sheet ice of a river or in the floating ice fields of a sea or lake. Polynyas form in rivers where there is a rapid current or where groundwater seeps into the river. They also form in tail waters. In addition, they form where warm water from industrial enterprises is emptied into a river and at the source of a river that originates in a lake, where the ice is broken up by the river’s movement. This is characteristic of seas, where polynyas are formed primarily by the wind.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
These gaps, known as polynyas, are common across Antarctica.
Satellite observations of the Antarctic ice began in the 1970s, and a much larger Polynya had been spotted in the same location in 1974, with smaller Polynya events occasionally occurring since then.
Abu Dhabi: A study led by New York University Abu Dhabi Institute (NYUAD) has helped unravel a four-decade-long mystery surrounding the occurrence of a mid-sea Polynya -- a body of unfrozen ocean that appeared within the sea ice pack during Antarctica's winter, almost two years ago.
Mercury bioaccumulation and biomagnification in a small Arctic polynya ecosystem.
Barber, Eds., Polynyas: Windows to the World, Elsevier, Amsterdam, The Netherlands, 2007
Gate, Novaya Zemlya, High Arctic Islands and Shelf, and Great Siberian Polynya
Polynyas play a crucial role in energy exchange and ice formation, so the occurrence of one inevitably draws the attention of researchers.
On entering the water, both PTT-bearing penguins swam northwards for [approximately equals] 40 km and then remained in a polynya [approximately equals] 90-110 km northeast of Auster until at least mid-July, when both PTTs failed.
Behaviour of ringed seals tagged with satellite transmitters in the North Water polynya during fast-ice formation.
A sensible-heat polynya is formed through the transfer of heat between two entities that are two different temperatures.
The only wintering site known was discovered in the 1990's and is located in a persistently-formed polynya in the Bering Sea south of St.