Sentences with phrase «atlantic gyre»

This shoots a cold current right up the back of South America, and makes a nozzle jet on the other side of the strait that turns the whole south Atlantic gyre.

The Gulf Stream is a western boundary current that arises due to basic physical processes involving the coriolis force and the North Atlantic Gyre; a similar current exist in the Pacific Basin.

Some of the warm water would be subducted by Atlantic Meridional Overturning Circulation / Thermohaline Circulation, some would be carried by ocean currents into the Arctic Ocean where it would melt sea ice, and the remainder would be spun southward by the North Atlantic gyre toward the tropics so it could be warmed more by the effects of the slower - than - normal trade winds.

Holland says it is due to a change in the atmospheric circulation resulting in a change in the North Atlantic gyre which then has allowed warmer water into the South Greenland region.

The North Atlantic gyre was indeed reported as weakening in 2004: http://www.sciencemag.org/cgi/content/abstract/304/5670/555

North Atlantic Gyre

In addition, it's hard to say how the wind - driven Atlantic gyre (whose western intensification drives the Gulf Stream's transport of warm salty water northward) will affect a weakened northern end of the AMOC.

I also have a hard time understanding how the Gulf Stream — the western boundary current of the North Atlantic gyre — would weaken much under global warming, as it is driven by a physical process, gyre circulation, amplified by the presence of the coastline: http://oceanmotion.org/html/background/western-boundary-currents.htm

In 2008 the predicted existence of a floating mass of pelagic plastic, a giant Garbage Patch, was confirmed in the stable waters of the North Atlantic gyre where plastic debris is accumulating over an area estimated to be twice the size of Texas.

All other marine life depends upon these bacteria, either directly or indirectly, for P. Therefore, if you're bacteria living in the impoverished North Atlantic Gyre, you'd better be really good at getting phosphorus.

Here we report that hatchling loggerheads, when exposed to magnetic fields replicating those found in three widely separated oceanic regions, responded by swimming in directions that would, in each case, help keep turtles within the currents of the North Atlantic gyre and facilitate movement along the migratory pathway.

On track, for these turtles, means following a warm, food - rich current system known as the North Atlantic gyre.

The scientists then plopped them — the biggest, seven inches long — off the coast of Florida and into the Gulf Stream, which is part of the North Atlantic Gyre, a system of currents that flows clockwise up the U.S. East Coast.

Not exact matches

They had just completed the third leg of the first expedition ever to study plastic pollution in the South Atlantic subtropical gyre.

High concentrations of microplastics have been found in five oceanic gyres (the North Atlantic, South Atlantic, South Indian, North Pacific and South Pacific gyres).

Most of the Atlantic Ocean exhibits warming with a major exception being the subarctic gyre.

Bonnie Monteleone spearheads annual sampling of the North Atlantic with BIOS and sailed from Brazil to South Africa with 5 Gyres Institute to collect 110 surface samples of plastic debris.

Now in the Gulf stream, this isobar gradient would be expected to reinforce the frictional wind forces, while in the eastern atlantic, it would oppose the frictional wind forces (thus leading to the necessary imbalance between the arms of the gyre I noted above).

a) The wind driven gyre fills the entire basin (between the rapid western boundary current and the slower southward returning currents in the rest of the Atlantic), and extends vertically down to the top of the NADW.

So, firstly, their findings don't support your speculation that changes in the wind - driven subtropical gyre might explain the observed tropical Atlantic SST warming.

This seems like it's going to keep tropical waters hotter and thus promote more hurricanes (in agreement with what Gray says (if one interprets his statements as referring to the portion of the atlantic circulation — the subtropical gyre — that delivers more warm water to the tropics).

Hatun H., SandØ A.B., Drange H., Hansen B. & Valdimarsson H. (2005) «Influence of the Atlantic Subpolar Gyre on the Thermocline circulation», Science, vol 309, 1841 - 1844

Hatun H., Sandø A.B, Drange H., Hansen B. & Valdimarsson H. (2005) «Inlfuence of the Atlantic Subpolar Gyre on the Thermocline Circulation», Science, vol 309, 1841 - 1844

Hatun et al. examined the possibilities that [i] a change in rain falling over the ocean (freshens the water) and evaporation (increases the salinity by removing water and leaving salt behind), [ii] increased salinity in the sub-tropical gyre (in the main part of the North Atlantic), [iii] increased salinity in the sub-polar gyre, or [iv] dynamical changes in the relative contributions from the two gyres could explain the high salinities in the in - flow regions.

Ultimately if the freshwater melt was a dominant (which seems hard to believe given the scale of the wind - driven gyre transport) factor, it would be entrained into the gyres at the surface and you'd see an overall freshening of North Atlantic surface waters to make the whole system more like the Pacific, which has a much weaker meridional overturning circulation.

The last timeframe in the Sub-polar Gyre was not published in Curry & Mauritzen's paper because they had very little data from the western Sub-polar Gyre in that period — the volume budget would therefore be biased towards the salty eastern atlantic, where the warm, salty subtropical waters reside.

Drexel Environmental Science Graduate Student [ANDY REVKIN says: Some of the sea ice on the Arctic Ocean kind of circles in a gyre, like a slow turntable, and much of it is ejected perpetually past Greenland into the North Atlantic by winds and currents.

«We are already seeing this in the North Atlantic subtropical gyre, and this is some of the first evidence for climate damping the ocean's ability to take up carbon from the atmosphere.»

To get a glimpse of what was going on in the dark, the researchers looked at samples from two subtropical gyres, or systems of rotating ocean currents, in the South Atlantic and North Pacific.

North Atlantic subpolar gyre along predetermined ship tracks since 1993: a monthly dataset of surface temperature, salinity, and density

The Transpolar Drift and Beaufort Gyre formerly brought new ice into the main pack and exported old ice - mainly on the Atlantic side through Fram Strait.

The sea surface temperature (SST) anomalies that define the AMV are characterized by a basin - scale pattern that has the same sign over the whole North Atlantic, with a maximum loading over the subpolar gyre region.

Where things get a little mysterious is in the attribution of the warming subsurface to a change in the NA gyre circulation, which is attributed to a switch in the NAO (North Atlantic Oscillation) from a positive to a negative phase.

The demonstration vessel seen below is our «Proof of Concept» boat that has shown we can harvest plastic and other waste from the 5 garbage Gyres in the Atlantic, Indian and Pacific Oceans and (via third parties) recycle that waste into clean diesel fuel for shipping and new plastic products.

13 Gyres Vertical columns or mounds of water at the surface and flow around them Produce enormous circular currents Five major locations: North Pacific - clockwise South Pacific - counterclockwise Indian Ocean - counterclockwise South Atlantic - counterclockwise North Atlantic - clockwise

The strength of the Icelandic Low is the critical factor in determining path of the polar jet stream over the North Atlantic In the winter the IL is located at SW of Greenland (driver Subpolar Gyre), but in the summer the IL is to be found much further north (most likely driver the North Icelandic Jet, formed by complex physical interactions between warm and cold currents), which as graphs show had no major ups or downs.

The strength of the Icelandic Low is the critical factor in determining path of the polar jet stream over the North Atlantic In the winter the IL is located at SW of Greenland (Subpolar Gyre) In summer the IL is to be found much further north (most likely the North Icelandic Jet, formed by complex physical interactions between warm and cold currents) These two run under two different regimes and two clocks (see the CET synthesis from 3 harmonics, one for each summer and winter, and one common — see the above link, bottom graph).

Characterize and investigate coherence within the subpolar and subtropical gyres, communication between the gyres, and communication of changes across the equator to the South Atlantic.

Two reasons why this should be so in the real world are that, first, the Southern Hemisphere subtropical gyres are situated mostly in the Southern Ocean and South Atlantic, and second, that some of the heat coming into the Pacific Ocean basin doesn't actually stay there.

In the northern hemisphere the land masses prevent this and the ocean circulation is broken into smaller gyres in the Atlantic and Pacific basins.

Not only has the AMOC slowed down (Cunningham et al [2013]-RRB-, but sea surface temperatures in North Atlantic subpolar gyre have begun falling, as have sea surface temperatures in the North Pacific subtropical gyre - best illustrated by the Pacific Decadal Oscillation (PDO) being strongly positive this year.

As the North Atlantic subtropical gyre spun - up in response to the trade wind - forcing, the gulfstream, the powerful ribbon - like western boundary current travelling north along the North American coast at the edge of the gyre, intensified.

The South Atlantic subtropical gyre seems still to be in a spun - up state.

not entirely clear, but since it is the north leg of the NAO (Icelandic pressure) that is determinant, it presumably takes some years for the warm atlantic currents to reach the Arctic and return as cold currents via Denmark Strait (Icelandic pressure) and few more years to loop into the subpolar gyre to initiate AMO oscillation Hence in order of occurrence NAP > NAO > AMO (refer to http://www.vukcevic.talktalk.net/NAOn.htm one but last illustration) Just as a reminder compare NAP waveform with the CET spectrum components (1660 - 2021) http://www.vukcevic.talktalk.net/CET-NV.htm I hope some of the above helps, but if not than your «how you cook up your «secret recipe» NAP misgiving is by far safer than accepting «blanco» assurance.

This subtropical gyre of warm North Atlantic Central Water is the hub of the energy that drives the North Atlantic circulation.

The southward - flowing currents are generally weaker than the Gulf Stream and occur in the eastern part of the North Atlantic Central Water lens or the subtropical gyre.

In the Atlantic subtropical gyre circulations also enhance.

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.

The flow of freshwater from the northern continents represents an export to the world ocean that goes almost entirely into the Atlantic, about 5.1 Sv passing as relatively low salinity water through the passages between Greenland and Ellesmere Island into the Labrador Sea, a flow of low salinity water that can subsequently be traced around the subpolar gyre.

Subtropical gyres are centered near 30 degrees latitude in the North and South Atlantic, the North and South Pacific, and the Indian Ocean.