Sheets of sea ice form when frazil crystals float to the surface, accumulate and bond together.
Because salt doesn't freeze, the crystals expel salt into the water, and frazil crystals consist of nearly pure fresh water. These crystals are typically 3 to 4 millimeters (0.12 to 0.16 inches) in diameter. Stages of ice formationĪs the ocean water begins to freeze, small needle-like ice crystals called frazil form. Furthermore, other factors cause sea ice formation to be a slow process. Generally, the top 100 to 150 meters (300 to 450 feet) of water must cool to the freezing point for sea ice to form. As a result, salt water sinks away from the surface before it cools enough to freeze. Secondly, in contrast to fresh water, the salt in ocean water causes the density of the water to increase as it nears the freezing point. First, the freezing temperature of salt water is lower than freshwater ocean temperatures must reach -1.8☌ (28.8☏) to freeze. Sea ice forms more slowly than freshwater for two main reasons. Lake ice tends to freeze as a smooth layer, while sea ice develops into various shapes because of the constant turbulence of ocean water. This sets it apart from other forms of ice like icebergs, glaciers, and lake ice, which form from fresh water or snow. Sea ice grows, forms, and melts strictly in salty ocean water. 13, 2012, in the Bellingshausen Sea with the Digital Mapping System (DMS) on board the NASA DC-8 flying laboratory. This complex mixture of different types of Antarctic sea ice was photographed on Oct.
#Three bears tok alaska archive
NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).
Greenland Today & Antarctic Ice Sheet Today.Shop like a local when you visit Three Bears Alaska. Some locations have fuel too so it’s easy to stop for everything you need from new fishing line for your reels, to ice for your catch and lunch and snacks to boot.
You’ll find everything you need to enjoy the Alaska outdoors to the max including help from their friendly staff. Three Bears Outpost locations are at the Tok, Chugiak, Kenai, Meadow Lakes, KGB Rd, Four Corners/Palmer, and Healy locations. They also have hunting and fishing licenses available at most locations. Three Bears Outpost features sporting goods ranging from guns and ammunition to rods and reels, tackle, fish and game processing equipment, gun safes, knives, apparel for fishing and hunting, camping gear, and a whole lot more. Started 40 years ago in Tok, Alaska, they now have 12 locations throughout the state and even one in Butte, MT. Eight of their locations feature Three Bears Alaska Outpost, a large sporting goods section with everything you need to fish and hunt in Alaska. But that’s not all Three Bears is to Alaska. Three Bears Alaska is a family owned and operated grocery store that locals rely on for excellent selection and prices.
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