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Plastic Accumulation in the North Atlantic Subtropical Gyre
Science, 2010Sea 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 +6 more
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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 +3 more
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Eddy Subduction in a Model of the Subtropical Gyre
Journal of Physical Oceanography, 2000Abstract 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.
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Phytoplankton growth rates in the Atlantic subtropical gyres [PDF]
Limnology and Oceanography, 2005 Reported estimates of phytoplankton growth rate (m) in the subtropical gyres range widely from 0.1-0.2 to 1-2 d 21 . Dividing chlorophyll a (Chl a)-normalized photosynthesis (P B ) and .40 determinations of phytoplankton C : Chl a obtained in surface waters of the eastern North Atlantic Subtropical Gyre (NAST-E), the western NAST (NAST-W), and the ...
Emilio Marañón
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Ventilation of Eastern Subtropical Gyres
Journal of Physical Oceanography, 1992Abstract 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
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Journal of Marine Systems, 2008
Abstract The interaction of the subtropical gyre and the Subtropical Cell was studied with emphasis on the Benguela upwelling system by observations of sea surface height, surface wind vectors, and precipitation. Additionally, current profiles, drifter data, and hydrographic data completed the data set.
Hans Ulrich Lass, Volker Mohrholz
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Abstract The interaction of the subtropical gyre and the Subtropical Cell was studied with emphasis on the Benguela upwelling system by observations of sea surface height, surface wind vectors, and precipitation. Additionally, current profiles, drifter data, and hydrographic data completed the data set.
Hans Ulrich Lass, Volker Mohrholz
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Decadal changes in salinity in the oceanic subtropical gyres
Journal of Geophysical Research: Oceans, 2017AbstractWe 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 A Melzer, Bulusu Subrahmanyam
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Oxygen dynamics in the North Atlantic subtropical gyre
Deep Sea Research Part II: Topical Studies in Oceanography, 2013Q1
Cianca, A. +7 more
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Meridional Location of the Pacific Ocean Subtropical Gyre
Journal of Physical Oceanography, 2000Abstract The observed subtropical gyre in the North Pacific shows a shift in meridional location with depth. At shallow levels the density deviation peaks at around 15°N while at deep levels the peak is more like 30°N. It is argued here using analytical solutions to the beta-plane shallow-water equations that such a shift can be explained by the ...
Richard Kleeman +2 more
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On the Circulation of the Warm Water of the Subtropical Gyres
Journal of Physical Oceanography, 1984Abstract A ventilated thermocline model is used to discuss the circulation of the warm water of the subtropical gyre. It is suggested on theoretical grounds that the warm water layers that outcrop well south of the zero wind-stress curl line are completely replenished by the mass flux pumped down from the upper Ekman layer while recirculation of mass ...
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