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contributor authorGary, S. F.
contributor authorLozier, M. S.
contributor authorKwon, Y.-O.
contributor authorPark, J. J.
date accessioned2017-06-09T17:20:14Z
date available2017-06-09T17:20:14Z
date copyright2014/05/01
date issued2014
identifier issn0022-3670
identifier otherams-83413.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4226636
description abstractorth Atlantic Subtropical Mode Water, also known as Eighteen Degree Water (EDW), has the potential to store heat anomalies through its seasonal cycle: the water mass is in contact with the atmosphere in winter, isolated from the surface for the rest of the year, and reexposed the following winter. Though there has been recent progress in understanding EDW formation processes, an understanding of the fate of EDW following formation remains nascent. Here, particles are launched within the EDW of an eddy-resolving model, and their fate is tracked as they move away from the formation region. Particles in EDW have an average residence time of ~10 months, they follow the large-scale circulation around the subtropical gyre, and stratification is the dominant criteria governing the exit of particles from EDW. After sinking into the layers beneath EDW, particles are eventually exported to the subpolar gyre. The spreading of particles is consistent with the large-scale potential vorticity field, and there are signs of a possible eddy-driven mean flow in the southern portion of the EDW domain. The authors also show that property anomalies along particle trajectories have an average integral time scale of ~3 months for particles that are in EDW and ~2 months for particles out of EDW. Finally, it is shown that the EDW turnover time for the model in an Eulerian frame (~3 yr) is consistent with the turnover time computed from the Lagrangian particles provided that the effects of exchange between EDW and the surrounding waters are included.
publisherAmerican Meteorological Society
titleThe Fate of North Atlantic Subtropical Mode Water in the FLAME Model
typeJournal Paper
journal volume44
journal issue5
journal titleJournal of Physical Oceanography
identifier doi10.1175/JPO-D-13-0202.1
journal fristpage1354
journal lastpage1371
treeJournal of Physical Oceanography:;2014:;Volume( 044 ):;issue: 005
contenttypeFulltext


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