Results 71 to 80 of about 224 (112)

The Dynamics of the Oceanic Subtropical Gyres

Science, 1990
Recent theoretical advances in physical oceanography have produced plausible models for the structure of the circulation in the oceans' subtropical gyres. These theoretical ideas are reviewed and assessed in the light of present observational evidence.
Joseph Pedlosky
exaly   +3 more sources

Decadal changes in salinity in the oceanic subtropical gyres

Journal of Geophysical Research: Oceans, 2017
AbstractWe analyzed spatial and temporal salinity trends in five subtropical gyre regions over the past six decades using Simple Ocean Data Assimilation (SODA) reanalysis with a focus on the subsurface salinity of the upper 1000 m of the ocean. Our results indicate an overall salinity increase within the mixed layer, and a salinity decrease at depths ...
Bryce Melzer, Bulusu Subrahmanyam
exaly   +2 more sources

On the recirculation of the subtropical gyre

Quarterly Journal of the Royal Meteorological Society, 1988
AbstractA hydrographic section through the Gulf Stream and its recirculation to the south is interpreted in terms of an analytical model based on the baroclinic Fofonoff gyre, in which layers shielded from forcing are homogenized to a uniform value of potential vorticity. Given this simple paradigm of the circulation, the process of anticyclogenesis is
John Marshall, George Nurser
openaire   +1 more source

Nanoplastic in the North Atlantic Subtropical Gyre

Environmental Science & Technology, 2017
Plastics can be found in all ecosystems across the globe. This type of environmental pollution is important, even if its impact is not fully understood. The presence of small plastic particles at the micro- and nanoscales is of growing concern, but nanoplastic has not yet been observed in natural samples. In this study, we examined four size fractions (
ter Halle, Alexandra, Jeanneau, Laurent, Martignac, Marion, Jardé, Emilie, Pedrono, Boris, Brach, Laurent, Gigault, Julien   +6 more
openaire   +4 more sources

Plastic Pollution in the South Pacific Subtropical Gyre

Plastics Engineering, 2013
Plastic marine pollution in the open ocean of the southern hemisphere is largely undocumented. Here, we report the result of a (4489 km) 2424 nautical mile transect through the South Pacific subtropical gyre, carried out in March-April 2011. Neuston samples were collected at 48 sites, averaging 50 nautical miles apart, using a manta trawl lined with a ...
Marcus, Eriksen, Nikolai, Maximenko, Martin, Thiel, Anna, Cummins, Gwen, Lattin, Stiv, Wilson, Jan, Hafner, Ann, Zellers, Samuel, Rifman   +8 more
openaire   +2 more sources

Anticyclonic eddies aggregate pelagic predators in a subtropical gyre

Nature, 2022
Ocean eddies are coherent, rotating features that can modulate pelagic ecosystems across many trophic levels. These mesoscale features, which are ubiquitous at mid-latitudes1, may increase productivity of nutrient-poor regions2,3, accumulate prey4 and modulate habitat conditions in the water column5.
Martin C. Arostegui, Peter Gaube, Phoebe A. Woodworth-Jefcoats, Donald R. Kobayashi, Camrin D. Braun   +4 more
openaire   +2 more sources

Plastic Accumulation in the North Atlantic Subtropical Gyre

Science, 2010
Sea of Plastic Plastics are highly resistant to degradation and persist in the environment after being discarded. Notoriously, plastics accumulate within ocean gyres, where patterns of surface circulation concentrate them into specific regions. One area of plastic buildup lies in the middle of the North Atlantic Gyre.
Kara Lavender, Law, Skye, Morét-Ferguson, Nikolai A, Maximenko, Giora, Proskurowski, Emily E, Peacock, Jan, Hafner, Christopher M, Reddy   +6 more
openaire   +2 more sources

The spiralling North Atlantic Subtropical Gyre

2020
<p>The North Atlantic Subtropical Gyre is shown to have a downward spiral flow beneath the mixed layer, where the water slowly gets denser, colder and fresher as it spins around the gyre. This path is traced with Lagrangian trajectories as they enter the Gyre in the Gulf Stream from the south until they exit through the North ...
Kristofer Döös, Sara Berglund, Trevor Mcdougall, Sjoerd Groeskamp   +3 more
openaire   +1 more source

Eddy Subduction in a Model of the Subtropical Gyre

Journal of Physical Oceanography, 2000
Abstract Subduction is the process by which fluid transfers from the mixed layer to the interior of the ocean. South of the Gulf Stream extension, 18° mode water is formed in a region of high subduction rates. In this region there is high mesoscale eddy activity.
Hazeleger, W., Drijfhout, S.S.
openaire   +1 more source

Ventilation of Eastern Subtropical Gyres

Journal of Physical Oceanography, 1992
Abstract A simple mechanism for the generation of flow in the eastern region of the oceans is presented. It is shown that even a small amount of upwelling-favorable wind stress parallel to the boundary makes the subducted geostrophic contours veer into the eastern boundary. This sweep toward the wall ventilates the top few hundred meters of the eastern
openaire   +1 more source