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Sea ice arises as seawater freezes. Because ice is less dense than water, it floats on the ocean's surface (as does fresh water ice). Sea ice covers about 7% of the ...
A salt lake, also known as a saline lake or brine lake, is an inland body of water situated in an arid or semiarid region, with no outlet to the sea, containing a high concentration of dissolved neutral salts (principally sodium chloride). Examples include the Great Salt Lake in Utah, and the Dead Sea in southwestern Asia. [36] [52]
An area which is over 70% ice on its surface is said to be covered by pack ice. [52] Fully formed sea ice can be forced together by currents and winds to form pressure ridges up to 12 metres (39 ft) tall. [53] On the other hand, active wave activity can reduce sea ice to small, regularly shaped pieces, known as pancake ice. [54]
Fast ice (also called land-fast ice, landfast ice, and shore-fast ice) is sea ice or lake ice [1] that is "fastened" to the coastline, to the sea floor along shoals, or to grounded icebergs. [ 2 ] [ 3 ] [ 4 ] Fast ice may either grow in place from the sea water or by freezing pieces of drifting ice to the shore or other anchor sites.
Lake-effect snow is produced as cold winds blow clouds over warm waters. Some key elements are required to form lake-effect precipitation and which determine its characteristics: instability, fetch, wind shear, upstream moisture, upwind lakes, synoptic (large)-scale forcing, orography/topography, and snow or ice cover.
The Arctic has already lost about half of its sea ice, compared to the 1980s at the end of the summer. It is known that more warming has delayed ice formation, and resulted in thinner sea ice growth.
In 2023, the Antarctic sea ice reached record-low levels, with over 2 million square kilometres less ice than usual during winter – about 10 times the size of the UK.
The claim: Polar sea ice extents show climate change is a 'scam' A Dec. 23, 2024, Facebook post (direct link, archive link) shows a map of Antarctic sea ice extent, or area, with color coding that ...