In 2012, a new record low was established, and a contributor to this was an unusually warm current that merged with the Beaufort
Sea Gyre.
Not exact matches
In previously ice - rich areas such as the Beaufort
Gyre off the Alaskan coast or the region south of Spitsbergen, the
sea ice is considerably thinner now than it normally is during the spring.
There's plastic trash littering «the Bay of Bengal, the Mediterranean
Sea, the coast of Indonesia, all five subtropical
gyres; coastal regions, enclosed bays,
seas and gulfs.»
At threshold sedimentation rates of 1 millimeter per 1000 years, the low rates of microbial community metabolism in the North Pacific
Gyre allow sediments to remain oxygenated tens of meters below the
sea floor.
In other paintings like
Gyre (2014) a fish leaping from the frothing
sea inhaling plastic household objects is a reference to the vast trash vortex in the North Pacific.
Each year enough is thrown away to circle the earth 4 times, with some 10 - 20 million tons reaching the ocean where it harms
sea life, kills birds and contributes to the famous plastic
gyre.
Or the fish jumping from the
sea in
Gyre (2014), either inhaling or vomiting the stream of household trash in which it swims.
«It is believed that in the late 1950s and early 1960s, freshwater and
sea ice accumulated in the Beaufort
Gyre as a consequence of the prevailing Arctic atmospheric circulation patterns (anti-cyclonic around an Arctic high pressure center.)
Hatun et al. also used altimeter data (local
sea level height measurements from satellite observations) to diagnose the norther oceans
gyre circulation.
The warm
sea surface temperatures in the
gyres, during hiatus decades, indicate convergence of near - surface currents and strong downwelling of heat.
Everything ends up in the
sea eventually, pretty much, as witness our oceanic «plastic
gyres».
Although the main focus of the 5
Gyres Institute is to determine the spacial distribution of plastic in the world's oceans (finding out what's the distribution and concentration of plastics in the
sea), in their trawls the scientists extract samples of lantern fish.
Apparently
gyres may have been reducing the rise in
sea level along the coasts as the climate warms even though the overall
sea level was rising — and much of the
sea level rise that we attributed to earlier in the twentieth century may actually have happened later in the twentieth century.
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.
Curiously, very little of the ice seems to be moving west along the archipelago, towards the Beaufort
sea polynya, which I would expect from the action of the Beaufort
Gyre.
When the NAO first enters a negative phase the sub-Polar
gyre contracts towards the west, allowing more warm water to enter the Irminger
Sea.
The amount of warm water entering the Irminger Current is particularly limited because the sub-Polar
gyre also shunts the pole - ward transport to the east towards the Barents
Sea.
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.
Surface water is transported to the subtropical
gyres because of the winds drag on the
sea surface.
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.
We can observe the
gyre in the Beaufort
Sea, offshore of the Canadian and Alaskan coasts as well as the ice flux leaving the Arctic Ocean through the Fram Straight, between Greenland and the Svalbard archipelago.
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.
The June outlook reflects the fact that winds during the last two weeks have reversed the flow of the buoys and
sea ice in the Beaufort
Gyre and Transpolar Drift Stream, slowing export and sequestering
sea ice in the Arctic.
Major features are southwestward advection of older
sea ice into the Beaufort
Gyre and southwestward advection of different
sea ice types toward Fram Strait in the Transpolar Drift.
Cumulative ice motions for April — July 2008 derived from drift buoys indicate the overall transport of ice out of the Beaufort
Sea around the Beaufort
Gyre to the central Arctic was actually much stronger than in 2007, but it appears to be converging (motion is slowing) over the Amundsen and Nansen Basins.
As for Antarctic
sea ice, that's very interesting and very likely related to the wind trends and their effect on the polar
gyres.
A shift in the Beaufort
Gyre towards less recirculation of ice within the Arctic Basin is partly responsible for the younger pack in the southern and western Beaufort
Sea.
Long - term changes in atmospheric circulation have resulted in an increased amount of perennial
sea ice being exported through Fram Strait rather than being recirculated (e.g., Beaufort
Gyre); this was what set up the 2007 record September minimum.
Decadal variations in the North Pacific
Gyre Oscillation are characterized by a pattern of
sea surface temperature anomalies that resemble the central Pacific El Niño, a dominant mode of interannual variability with far - reaching effects on global climate patterns5, 6, 7.
But it's not limited to the
gyres; studies estimate there are 15 — 51 trillion pieces of plastic in the world's oceans — from the equator to the poles, from Arctic ice sheets to the
sea floor.
Five major
sea current
gyres are correlated with the dominant wind flows.
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.
The outgoing flow through Fram Strait carries with it large volumes of fresh water as fragmented pack ice, a flow that is strongly episodic at decadal scale and is associated with the series of so called Great Salinity Anomalies observed within the circulation of the subarctic
gyre and in the Nordic
seas that were discussed in the previous chapter.
In the Beaufort and Chukchi
seas, ice distribution mimicks the Beaufort
Gyre circulation pattern with advection of ice from the high Canadian Arctic into the Beaufort
Sea and export of ice northward in the Chukchi
Sea.
In response to your question I would refer you to my comment above Dave Wendt (14:39:39): where I discuss the Rigor and Wallace paper of 2004 which demonstrated that the decline in
sea ice age and thickness began with a shift in state in Beaufort
Gyre and the TransPolar Drift in 1989 which resulted in multiyear ice declining from over 80 % of the Arctic to 30 % in about one year and that the persistence of that pattern has been responsible for the continuing decline.
This transport produces a broad mounding of water as high as 1 m (3 ft) above mean
sea level near the center of the
gyre (Figure 6.5).
Eventually, the outward - directed pressure gradient force balances the apparent force due to the Coriolis effect and the water parcels flow around the
gyre and parallel to contours of elevation of
sea level.
Andrey Proshutinsky, Sarah Zimmermann, Tim Kane, and Luc Rainville of the 2007 Beaufort
Gyre Exploration Project cruise on the Louis St. Laurent for dropping XCPs in the Beaufort
Sea.
Closer to the continent, easterly winds form a series of clockwise
gyres (most notably in the Ross and Weddell
seas) that form the westward - flowing Antarctic Coastal Current [1]--[4].
The Sun is involved, other CO2E gases, particulates, weather phenomena, ocean
gyres, plants, plankton, albedo,
sea ice extent, salt concentration of
sea water..
Any circular water flow will tend to push water in towards it's center -
sea levels are higher at the centre of the
gyres as a result.
The boats can be retrofitted to deal with any environmental disaster at
sea where it's difficult or dangerous to send human workers: The original vision — pre-Deepwater — was for the boats to head the Pacific
Gyre and pick up trash in nets, because it seems that no human is ever going to lift a finger to clean it up.
It's our fifth day on the
Sea Dragon, the sailboat that's taking a crew of 13 people on an expedition with the 5
Gyres project to find out if the South Pacific presents the same plastic pollution found in the North Pacific, North Atlantic, Indian Ocean and South Atlantic.
They found that in the last 40 years the amount of discarded plastics has led to a 100-fold rise in plastic particles in the North Pacific Subtropical
Gyre (Great Pacific Garbage Patch) and is causing creatures like the
sea skater (Halobates sericeus) to alter their behaviour due to changes in habitat.
Using Topex / Poseidon
sea - surface height data, the researchers inferred Labrador Sea water in the core of the gyre warmed during the 199
sea - surface height data, the researchers inferred Labrador
Sea water in the core of the gyre warmed during the 199
Sea water in the core of the
gyre warmed during the 1990s.