Sentences with phrase «circumpolar current»

Actually, I may have been told that that wind patterns reflect the ocean currents and the circumpolar current around Antarctica has been tightening (Once again, I don't know why) and so the wind patterns are copying this behaviour.

These are tiny numbers in comparison what is going on in rest of the oceans; e.g. Florida current is 30x as large, Circumpolar current at Drake passage to 250m depth alone is ~ 200x and various Pacific currents are many hundreds times as large.

Scaled to the entire circumpolar current, the mixing we observe is compatible with there being a southern component to the global overturning in which about 20 sverdrups (1 Sv = 106 m3 s − 1) upwell in the Southern Ocean, with cross-density mixing contributing a significant fraction (20 to 30 per cent) of this total, and the remainder upwelling along constant - density surfaces.

The powerful Antarctic Circumpolar Current began to sweep all the way around the continent, effectively isolating Antarctica from most of the warmth from the global oceans and provoking large - scale cooling.

I am actually not aware why the atlantic overturning (conveyor) should be sensitive to altered wind patterns in the long run, provided that they does not significantly weaken the Antarctic circumpolar current or amplify arctic ice cover.

Additionally, the intensified winds of the mid-latitude westerlies, and a poleward shift of the strongest winds toward the Antarctic Circumpolar Current will also lead to stronger convergence of surface currents, and stronger downward heat transport.

Could it be that fluctuations in the Antarctic Circumpolar current impact CO2 uptake?

In addition, changes in the extent and duration of ice, combined with changes in characteristics of currents — for example, the circumpolar current in southern latitudes — may affect the distribution, abundance, and harvesting of krill.

The fastest ocean current in the world, the Antarctic Circumpolar Current, continuously circles the continent, driven by strong westerly winds that are unimpeded by land.

A ring forms when a meander in a boundary current (or the Antarctic Circumpolar Current) becomes a loop that pinches off (separates) from the main current and moves independently as an eddy.

Among these boundary currents are the Gulf Stream and the Kuroshio (off Japan), which rank next in volume of water flow to the Antarctic Circumpolar Current.

This vast expanse of water is home to the largest ocean current in the world: the Antarctic Circumpolar Current.

North of the Polar Front, the moderately fresh, cool sub-Antarctic surface waters are separated from the more saline subtropical waters by the Subtropical Front, marking the northernmost extent of the Antarctic Circumpolar Current [5].

Sea ice dynamics in the NH makes thing more interesting, but the SH has some sea ice dynamics as well that can tend to vary the Antarctic Circumpolar Current, (ACC) both tend to impact the Thermohaline Current (THC).

Importantly, some 70 % of all wind energy going into the world's oceans enters through the Antarctic Circumpolar Current.

The effects of this marked shift in westerly winds are already being seen today, triggering warm and salty water to be drawn up from the deep ocean, melting large sections of the Antarctic ice sheet with unknown consequences for future sea level rise while the ability of the Antarctic Circumpolar Current to soak up heat and carbon from the atmosphere remains deeply uncertain.

The majority of Antarctic Circumpolar Current water is transported by jets in the Sub-Antarctic Front and the Polar Front.

This region represents a sharp boundary in physical conditions that was established after the initiation of the Antarctic Circumpolar Current and became more extreme at the middle Miocene climate transition (∼ 13.8 Mya [54]-RRB-, a time that is close to the initiation of spreading at the ESR.

The circumpolar current acts as a buffer preventing warm water from the tropics from transporting heat to the South Pole, a buffer that does not exist in the north.

The ocean waters of the deep circumpolar current that swirl around the continent have been getting measurably warmer and nearer the ocean surface over the last 40 years, [continue reading...]

This convergence zone is caused directly by the Antarctic Circumpolar Current (ACC).

Figure 4, C and D, shows that the dominant OHC variability below 300 m occurs mainly in the Atlantic basin and the Antarctic Circumpolar Current (ACC) region.

The Atlantic Ocean and the Antarctic Circumpolar Current region.

Additionally, a southward shift of the Antarctic Circumpolar Current is projected to occur in a 15 - member multi-model ensemble, due to changes in surface winds in a future warmer climate (Fyfe and Saenko, 2005).

It is weaker, however, than the Antarctic Circumpolar Current.»

The mighty Southern Ocean Circumpolar Current prevents warmer ocean water from reaching the Antarctic sea ice zone, helping to isolate the continent.

«And the Antarctic is surrounded by the circumpolar current, which isolates the Antarctic from the rest of the world.»

New work on regional projections and emergence of the anthropogenic signal suggests that the two commonly predicted features of future regional sea level change (the increasing tilt across the Antarctic Circumpolar Current and the dipole in the North Atlantic) are related to regional changes in wind stress and surface heat flux.

The study also found that the Southern Ocean Circumpolar Current, which helps determine sea - ice extent, is steered by submerged ridges and canyons along the edge of the Antarctic continental shelf, rather than by global warming or other climatic conditions.

These range from few years (Beaufort gyre 4 years, Circumpolar current 8 years, Indian ocean gyre 10 years, N. Atlantic subpolar gyre 20 years etc.) up to above 100 years for some of the Pacific gyres, and finally the great ocean conveyor belt estimated at ~ 1600 years.

IIRC, the closing off of the isthmus between N and S america explains some changes, and the seperation of SA from the Antarctic some 40 million years ago allowed the formation of the antarctic circumpolar current which then allowed the formation of the antarctic ice sheets.

The West Antarctic Peninsula is bathed by relatively warm waters from the Antarctic Circumpolar Current that comes close to the surface near the peninsula, and that current is gaining heat as the oceans warm, studies show.

Warming is concentrated within the Antarctic Circumpolar Current (ACC).

In the south low pressure at the poles increases the strength of the circumpolar current through Drakes Passage and constrain storms to the polar region — with significant implications for Southern Hemisphere hydrology.

The Antarctic Circumpolar Current is the only ocean current to circle the planet and the largest wind - driven current on Earth.

Notorious among sailors for its strength and the rough seas it creates, the Antarctic Circumpolar Current (ACC) is the largest wind - driven current on Earth and the only ocean current to travel all the way around the planet.

Scientists have observed that pressure from current - seafloor encounters drives the direction of the massive Antarctic Circumpolar Current in the Southern Ocean.

Although Antarctica contains 14 times more ice than Greenland, Greenland has lost between 2 and 5 times more ice than Antarctica.33, 34 Based on changes in gravity, most areas of Antarctica have slightly gained ice designated by greenish tones.24 However where warm waters and winds of the Circumpolar current approach the Peninsula, there has been moderate ice loss designated by bluish tones.

Because there are no continents to block its path or deflect those warm waters poleward, the Circumpolar Current simply encircles the continent.

The wave moves eastward in the direction of the Antarctic Circumpolar Current.

In the southern hemisphere there is a continuous belt of ocean, and hence the mid-latitude westerlies force the strong Antarctic Circumpolar Current.

The NADW is entrained into the Circumpolar Current, and can be traced into the Indian and Pacific basins.

The remaining will flow south on the EAC Extension until it reaches the Antarctic Circumpolar Current.

It is generally accepted that these prevailing winds are primarily responsible for the circumpolar current transport.

While part of the tidal energy is dissipated on the coasts, another part turns into the circumpolar current and is ultimitely dissipated on the ocean floor, and that current could be reduced or eliminated if the Strait of Magellan froze deep, reducing the rate of deceleration and allowing the core to catch up a little (in its deceleration).

Farneti, R., S.M. Downes, S.M. Griffies, S.J. Marsland, E. Behrens, M. Bentsen, D. Bi, A. Biastoch, C. Böning, A. Bozec, V.M. Canuto, E. Chassignet, G. Danabasoglu, S. Danilov, N. Diansky, H. Drange, P.G. Fogli, A. Gusev, R.W. Hallberg, A. Howard, M. Ilicak, T. Jung, M. Kelley, W.G. Large, A. Leboissetier, M. Long, J. Lu, S. Masina, A. Mishra, A. Navarra, A.J. George Nurser, L. Patara, B.L. Samuels, D. Sidorenko, H. Tsujino, P. Uotila, Q. Wang, and S.G. Yeager, 2015: An assessment of Antarctic Circumpolar Current and Southern Ocean Meridional Overturning Circulation during 1958 - 2007 in a suite of interannual CORE - II simulations.

Extra Cold water in the Circumpolar current, low Solar activity [10.7 cm Flux - > 100 — 110], and Sun still in Northern Hemisphere these combine to accelerate the Cold / Cooling increasing the Sea Ice Extent.

Did Antarctic circumpolar current move southwards already back in the 50s?

The Antarctic Circumpolar Current also increased global upwelling and the efficiency of the biological pump.

It was commonly believed, and is still believed by most, that as plate tectonics rearranged the continents, the Antarctic Circumpolar Current (ACC) formed and strengthened.