Antarctic Circumpolar Current
Q. Which among the following is not a Pacific Ocean current? Notes: The Benguela current is a cold ocean current in the Atlantic Ocean. Oyashio current (cold) California current (cold) and Humboldt current (cold) are ocean currents in the pacific ocean.
There are five major ocean-wide gyres—the North Atlantic, South Atlantic, North Pacific, South Pacific, and Indian Ocean gyres. Each is flanked by a strong and narrow “western boundary current,” and a weak and broad “eastern boundary current” (Ross, 1995).
For example, the South Equatorial Current in the Pacific Ocean moves only a mile an hour, so it would only speed up 0.05 mph in a decade, he said. Given the enormous amounts of water on the move, though, it takes a significant amount of energy input to create that acceleration.
Two major kinds of currents define the planet's oceans: surface currents driven by wind and deep-water currents driven by variations in seawater density.
A warm current is moving away from the Equator toward the poles. The water in a warm current is warmer than the surrounding water. Upon contact, the drift splits sending a current of warm water poleward (the Alaska Current) and current of cold water Equatorward (the California Current).
Two types of ocean circulation
- Equatorial currents. At the Equator the currents are for the most part directed toward the west, the North Equatorial Current in the Northern Hemisphere and the South Equatorial Current in the Southern Hemisphere.
- The subtropical gyres. The subtropical gyres are anticyclonic circulation features.
- The subpolar gyres.
Covering approximately 63 million square miles and containing more than half of the free water on Earth, the Pacific is by far the largest of the world's ocean basins.
If you do get caught in a rip current, the best thing you can do is stay calm. It's not going to pull you underwater, it's just going to pull you away from shore. Call and wave for help. You want to float, and you don't want to swim back to shore against the rip current because it will just tire you out.
The surface layer of the Pacific Ocean waters ranges from about 300 to 900 metres thick. This warm layer is shallower along the coasts of North America than in the central and western regions of the Pacific. This seems strange because the surface waters in the South Pacific are definitely warmer.
The warm western boundary current are fast, deep and narrow: The Gulf Stream in the South Atlantic and Kuroshio in the North Pacific are 50-75 km across and can flow at speeds of up to 3-4 km per hour (1 m s-1), but can be as fast as 7 km per hour ( 2 m s-1).
The North Pacific Gyre (NPG) or North Pacific Subtropical Gyre (NPSG), located in the northern Pacific Ocean, is one of the five major oceanic gyres. It is the site of an unusually intense collection of man-made marine debris, known as the Great Pacific Garbage Patch.
The Southern Pacific Gyre is part of the Earth's system of rotating ocean currents, bounded by the Equator to the north, Australia to the west, the Antarctic Circumpolar Current to the south, and South America to the east.
The North Pacific Subtropical Gyre is formed by four currents rotating clockwise around an area of 20 million square kilometers (7.7 million square miles): the California current, the North Equatorial current, the Kuroshio current, and the North Pacific current.
Japan is an island country comprising a stratovolcanic archipelago over 3,000 km (1,900 mi) along East Asia's
Pacific coast. It consists of 6,852 islands. The 5 main islands are Hokkaido, Honshu, Kyushu, Shikoku and Okinawa.
Geography of Japan.
| Continent | Asia |
|---|
| Exclusive economic zone | 4,470,000 km2 (1,730,000 sq mi) |
Rivers discharge mineral-rich water to the oceans. Satellite view of La Plata River discharge to the Atlantic Ocean. One way minerals and salts are deposited into the oceans is from outflow from rivers, which drain the landscape, thus causing the oceans to be salty.
Ocean salt primarily comes from rocks on land and openings in the seafloor. Rocks on land are the major source of salts dissolved in seawater. Rainwater that falls on land is slightly acidic, so it erodes rocks. This releases ions that are carried away to streams and rivers that eventually feed into the ocean.
This thermohaline circulation is also known as the ocean's conveyor belt. These currents, sometimes called submarine rivers, flow deep below the surface of the ocean and are hidden from immediate detection.
What is another word for ocean current?
| current | deep current |
|---|
| marine current | ocean circulation |
| thermohaline circulation | |
The
Ocean Currents in the northern hemisphere deflect towards their right and in the southern hemisphere deflect towards their left due to the Coriolis force.
List of Ocean Currents of the World.
| Name of Current | Nature of Current |
|---|
| Antarctica Current | Cold |
| Okhotsk Current | Cold |
| Florida Current | Warm |
| Gulf Stream | Warm |
Ocean water is constantly moving, and not only in the form of waves and tides. Ocean currents flow like vast rivers, sweeping along predictable paths. Some ocean currents flow at the surface; others flow deep within water.
Horizontal movements are called currents, which range in magnitude from a few centimetres per second to as much as 4 metres (about 13 feet) per second. A characteristic surface speed is about 5 to 50 cm (about 2 to 20 inches) per second.
Three forces cause the circulation of a gyre: global wind patterns, Earth's rotation, and Earth's landmasses. Wind drags on the ocean surface, causing water to move in the direction the wind is blowing. The Earth's rotation deflects, or changes the direction of, these wind-driven currents.
Current electricity is a constant flow of electrons. There are two kinds of current electricity: direct current (DC) and alternating current (AC).
Ocean currents regulate climate and prevent it from becoming overly extreme. People have used ocean currents to explore the Earth. Ocean currents affect the shipping industry, commercial and recreational fishing, and recreational navigation for boats.
Deep currents are driven by temperature and water density/salinity. Of course, deep currents impact surface currents, which carry warm water to the poles. Surface currents are also driven by global wind systems fueled by energy from the sun. Factors like wind direction and the Coriolis effect play a role.
Ocean currents can be caused by wind, density differences in water masses caused by temperature and salinity variations, gravity, and events such as earthquakes or storms. Currents are cohesive streams of seawater that circulate through the ocean.
Disadvantages - Sometimes there will not be a lot of waves (which means no energy), It could interfere with ocean ecosystems in the area of the currents, and the temperature is raised wherever ocean currents are happening (which could also ruin an ecosystem).
The ocean currents carry warmth from the tropics up to these places, which would no longer happen. If the currents were to stop completely, the average temperature of Europe would cool 5 to 10 degrees Celsius. There would also be impacts on fisheries and hurricanes in the region.
Deep ocean currents (also known as Thermohaline Circulation) are caused by: The density of sea water varies globally due to differences in temperature and salinity. Surface water is heated by the sun, and warm water is less dense than cold water. The earth's rotation also influences deep ocean currents.
A gyre is a large system of rotating ocean currents.Wind, tides, and differences in temperature and salinity drive ocean currents. The ocean churns up different types of currents, such as eddies, whirlpools, or deep ocean currents.
Ocean gyres are present in every ocean and move water from the poles to the equator and back again. The water warms at the equator and cools at the poles. Because ocean water temperatures can transfer to the air, the cold and warm waters circulated by the gyres influence the climate of nearby landmasses.
