Sentences with phrase «subpolar gyre»
A subpolar gyre refers to a circular ocean current that occurs in colder regions, near the poles. It is a large spinning movement of water that affects the climate and marine life in those areas. Full definition
We are reporting monthly time series of surface temperature, salinity and density in the North Atlantic subpolar gyre in 1993 — 2017 from hydrographical data collected in particular from thermosalinographs on board selected ships of opportunity.
earth-syst-sci-data-discuss.net
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 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
North Atlantic subpolar gyre along predetermined ship tracks since 1993: a monthly dataset of surface temperature, salinity, and density
Its the large currents circulatory systems is known as N. A. Subpolar gyre (SPG), where overflow of the cold Arctic currents is mixed with the warm Gulf Stream's waters.
Characteristic features of «accelerated warming decades» are anomalous cooling on the surface of the North Atlantic subpolar gyre (a clockwise circulating gyre south of Greenland), and cooling of all the subtropical ocean gyres as they begin to spin - down in response to the weak wind - forcing.
Wind drives a strengthened subtropical gyre (large - scale rotating ocean current) with respect to a subpolar gyre in the interior basin.
The shift is associated with a stronger relation between MOC - variations and heat flux variations over the subpolar gyre.
No: The northern oceans are significantly fresher than they were in the 1960s — the extra 1.8 meter of freshwater in the Nordic Seas has lost 10 cm, and the extra 3 meters of freshwater in the Subpolar Gyre has, in an upper limit, lost 1 meter.
After I read the Hatun et al paper I thought the major point of the paper was that ocean circulation and the subpolar gyre is an important but little understood factor in the THC and more research in the area was needed.
To conclude: The Subpolar Gyre and the Nordic Seas are probably still a lot fresher than they ever were in the decades before the 1990s (even if the warm and salty Gulf Stream system is now putting up a good fight).
But does that mean that the freshening of the subpolar gyre has ceased?
Abstract: Post-glacial uplift and convection in the underlying mantle uplift in the Hudson Bay area (as reflected in the changes of the area's gravity and magnetic intensity) are making significant contribution to the Davis Straits rate of flow, affecting composition of the Labrador current and further the Subpolar gyre's circulation, which is the engine of the heat transport across the North Atlantic Ocean and very relevant to the Atlantic basin climate.
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.
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.
Finally, Clement et al. note that the argument for a role for ocean dynamics, namely the AMOC, pertains to a particular region of the subpolar gyre.
Rather, while the ocean may be doing something to the surface energy budget in parts of the subpolar gyre in coupled models, its effect on the AMO is small compared to the stochastic atmospheric forcing.
This new paper by Buckley and Marshall proposes that a pacemaker region for decadal AMOC changes is located in a western «transition zone» along the boundary between the subtropical and subpolar gyres.
The subtropical gyres in each ocean are associated with high pressure in the centre of the gyres; the subpolar gyres are associated with low pressure.
The subpolar gyre shrinks and retreats westward.
If sustained, these winds strengthen the subpolar gyre that circles counterclockwise in the far North Atlantic.
Computer models have shown the slowing and speeding up of the subpolar gyre can influence the entire ocean circulation system.»
But the NAO has switched phases twice in the 1990s, while the subpolar gyre current has continued to weaken.
The cold water region with very cold coastal waters along the Greenland and Labrador coasts form the western part of the subpolar gyre circulating anticlockwise.