Coast Guard, NOAA conduct joint boardings in the Gulf of Alaska - omarcafini.info
Amazing Facts About Gulf Of Alaska Where 2 Oceans Meet But Dont Mix gulf of alaska where two oceans meet underwater|| Two Seas Meet. Feds declare salmon disaster for Gulf of Alaska fisheries. Posted Amazing Facts About Gulf Of Alaska Where 2 Oceans Meet But Dont Mix. The photo shows a scene on the ocean where the waters of the Gulf two bodies of water never mix with each other, allowing the Gulf of Switch camera This is where the iron rich copper river up in the Alaska gulf meets the less dense ocean water. Don't Be Fooled By This "Underwater Waterfall".
Arctic shelf water and Greenland Sea Deep Water. Water in the shelf region that begins as inflow from the Pacific passes through the narrow Bering Strait at an average rate of 0.
This water is met by Greenland Sea Deep Water, which forms during the passage of winter storms. As temperatures cool dramatically in the winter, ice forms and intense vertical convection allows the water to become dense enough to sink below the warm saline water below. The overturning of this water plays a key role in global circulation and the moderation of climate.
In the depth range of — metres —2, feet is a water mass referred to as Atlantic Water. Inflow from the North Atlantic Current enters through the Fram Straitcooling and sinking to form the deepest layer of the halocline, where it circles the Arctic Basin counter-clockwise.
This is the highest volumetric inflow to the Arctic Ocean, equalling about 10 times that of the Pacific inflow, and it creates the Arctic Ocean Boundary Current. In fact, this water mass is actually warmer than the surface water, and remains submerged only due to the role of salinity in density.
Water in the Beaufort Gyre is far less saline than that of the Chukchi Sea due to inflow from large Canadian and Siberian rivers. The most important feature of this water mass is a section referred to as the sub-surface layer. It is a product of Atlantic water that enters through canyons and is subjected to intense mixing on the Siberian Shelf.
This insulation keeps the warm Atlantic Water from melting the surface ice. Additionally, this water forms the swiftest currents of the Arctic, with speed of around 0.
Gulf Of Alaska Where Two Oceans
Waters originating in the Pacific and Atlantic both exit through the Fram Strait between Greenland and Svalbard Islandwhich is about 2, metres 8, feet deep and kilometres miles wide. This outflow is about 9 Sv. Because of this, it is influenced by the Coriolis forcewhich concentrates outflow to the East Greenland Current on the western side and inflow to the Norwegian Current on the eastern side.
With this dependence, the Arctic Ocean experiences variations due to seasonal changes in sea ice cover. Sea ice movement is the result of wind forcing, which is related to a number of meteorological conditions that the Arctic experiences throughout the year.
For example, the Beaufort High—an extension of the Siberian High system—is a pressure system that drives the anticyclonic motion of the Beaufort Gyre. In addition, there is a sea level pressure SLP ridge over Greenland that drives strong northerly winds through the Fram Strait, facilitating ice export.
This is especially important with deep water sites, like the civil war iron clad Monitor at a depth of over feet. The condition of the wreck can be regularly monitored without having divers do a risky decompression dive. They are videotaping the wreckage of the infamous Penobscot Expedition oflong considered the worst naval defeats in US history prior to Pearl Harbor.
The camera allows the archeologists to construct a video map of the site before beginning excavation. Underwater cameras are also used extensively by power companies to perform inspections of dams and other underwater structures. Ontario Power in Toronto needed a way to inspect the tailrace, concrete piers, head-works, sluiceway aprons and draft tubes at several of their plants.
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The maneuverability of the ROV allowed it to easily reach various parts of the dam structure even in the high current environment. Commercial divers and marine services companies depend on underwater camera systems to assist in their operations too. Employing cameras allows them to reduce the amount of time divers have to spend in the water and completely eliminate the need to dive on some projects.
This saves time and money. The ROV descended to the bottom of the lock and through a tunnel to find the stuck gate, all in near zero visibility. And in Sri Lanka, marine service provider Colombo Engineering, used one of Fishers diver-held camera systems to videotape a problem with a propeller on a sea-going freighter.
A marine architect was able to view a videotape of the damaged prop and come up with a temporary solution, which was to cut off the blade opposite of the broken blade. This allowed the ship to continue on to its destination without having to be dry-docked, a very expensive and time-consuming procedure. Another group making extensive use of underwater cameras are law enforcement agencies and dive rescue groups.
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These dive teams are using Fishers video systems to help them locate drowning victims and to search for importance evidence, such as a weapon that was disposed of in a waterway. Groups like the Baxter County Sheriffs Department in Arkansas and the Missouri State Water Patrol regularly use their towed video systems to conduct searches in cold, dark lakes thus reducing the risk to their public safety divers.
When a waterfront nightclub collapsed into the Delaware River, casting dozens of patrons into the chilly waters and killing three, the Philadelphia Marine Police were quickly called in. Using their Fisher underwater camera they were able to assess the treacherous underwater scene before deploying divers to search for the victims. Underwater cameras are also being used to educate and entertain the general public.
When a charter boat captain in Maine was looking for a way to increase his share of summer tourist traffic, he found the answer by putting a SeaOtter on board. Guests on the boat not only have the opportunity to view the scenic New England seashore, but are also treated to a show of the marine life that inhabits local bays and inlets. Visitors have a chance to see fish, lobsters, crabs, octopus, starfish, seals, seahorses, and a variety of other underwater creatures - all in their native habitat.
A cruise line operator found this to be true too. Probably the most exciting use of underwater cameras is in finding shipwrecks and assisting in the search for the treasures on board. The remote operated vehicle let us view the wreckage of the huge ocean liner as it sat eerily motionless on the ocean floor at over 12, feet deep.