Eddy Saturation of Equilibrated Circumpolar Currents
TLDR
In this paper, the authors used a sector configuration of an ocean general circulation model to examine the sensitivity of circumpolar transport and meridional overturning to changes in Southern Ocean wind stress and global diapycnal mixing.Abstract:
This study uses a sector configuration of an ocean general circulation model to examine the sensitivity of circumpolar transport and meridional overturning to changes in Southern Ocean wind stress and global diapycnal mixing. At eddy-permitting, and finer, resolution, the sensitivity of circumpolar transport to forcing magnitude is drastically reduced. At sufficiently high resolution, there is little or no sensitivity of circumpolar transport to wind stress, even in the limit of no wind. In contrast, the meridional overturning circulation continues to vary with Southern Ocean wind stress, but with reduced sensitivity in the limit of high wind stress. Both the circumpolar transport and meridional overturning continue to vary with diapycnal diffusivity at all model resolutions. The circumpolar transport becomes less sensitive to changes in diapycnal diffusivity at higher resolution, although sensitivity always remains. In contrast, the overturning circulation is more sensitive to change in diapycnal...read more
Citations
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Residual-mean solutions for the Antarctic Circumpolar Current and its associated overturning circulation
John Marshall,Timour Radko +1 more
TL;DR: In this article, the authors applied residual mean theory to the streamwise-averaged Antarctic Circumpolar Current to obtain a concise description of the processes that set up its stratification and meridional overturning circulation on an f plane.
Journal ArticleDOI
Antarctic sea ice control on ocean circulation in present and glacial climates.
Raffaele Ferrari,Malte F. Jansen,Jess F. Adkins,Andrea Burke,Andrew L. Stewart,Andrew F. Thompson +5 more
TL;DR: This study shows that this rearrangement of deep water masses is dynamically linked to the expansion of summer sea ice around Antarctica, and may help quantify the ocean’s role in regulating atmospheric carbon dioxide on glacial–interglacial timescales.
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The Finite Element Sea Ice-Ocean Model (FESOM) v.1.4: formulation of an ocean general circulation model
Qiang Wang,Sergey Danilov,Dmitry Sidorenko,Ralph Timmermann,Claudia Wekerle,Xuezhu Wang,Thomas Jung,Jens Schröter +7 more
TL;DR: The Finite Element Sea Ice-Ocean Model (FESOM) as mentioned in this paper is the first global ocean general circulation model based on unstructured-mesh methods that has been developed for the purpose of climate research.
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Beyond the bipolar seesaw: toward a process understanding of interhemispheric coupling
Joel B Pedro,Markus Jochum,Christo Buizert,Feng He,Feng He,Stephen Barker,Sune Olander Rasmussen +6 more
TL;DR: The thermal bipolar ocean seesaw hypothesis was advanced by Stocker and Johnsen (2003) as the "simplest possible thermodynamic model" to explain the time relationship between Dansgaard-Oeschger (DO) and Antarctic Isotope Maxima (AIM) events as discussed by the authors.
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GO5.0: The joint NERC-Met Office NEMO global ocean model for use in coupled and forced applications
Alex Megann,D. Storkey,Yevgeny Aksenov,S.G. Alderson,Daley Calvert,Tim Graham,Patrick Hyder,John Siddorn,Bablu Sinha +8 more
TL;DR: The Global Ocean standard configuration (GO5.0) as mentioned in this paper was developed with the seamless approach to modelling in mind for ocean modelling across timescales and for a range of applications, from short-range ocean forecasting through seasonal forecasting to climate predictions as well as research use.
References
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Climate change 2007: the physical science basis
Susan Solomon,Dahe Qin,Martin R. Manning,Melinda Marquis,Kristen Averyt,Melinda M.B. Tignor,H. L. Miller,Z. Chen +7 more
TL;DR: The first volume of the IPCC's Fourth Assessment Report as mentioned in this paper was published in 2007 and covers several topics including the extensive range of observations now available for the atmosphere and surface, changes in sea level, assesses the paleoclimatic perspective, climate change causes both natural and anthropogenic, and climate models for projections of global climate.
Journal ArticleDOI
Isopycnal mixing in ocean circulation models
TL;DR: In this paper, a subgrid-scale form for mesoscale eddy mixing on isopycnal surfaces is proposed for use in non-eddy-resolving ocean circulation models.
Journal ArticleDOI
The Last Glacial Maximum.
Peter U. Clark,Arthur S. Dyke,Jeremy D. Shakun,Anders E. Carlson,Jorie Clark,Barbara Wohlfarth,Jerry X. Mitrovica,Steven W. Hostetler,A. Marshall McCabe +8 more
TL;DR: The responses of the Northern and Southern Hemispheres differed significantly, which reveals how the evolution of specific ice sheets affected sea level and provides insight into how insolation controlled the deglaciation.
Journal ArticleDOI
A finite-volume, incompressible Navier Stokes model for studies of the ocean on parallel computers
TL;DR: A preconditioner is used which, in the hydrostatic limit, is an exact integral of the Poisson operator and so leads to a single algorithm that seamlessly moves from nonhydrostatic to hydrostatic limits, competitive with the fastest ocean climate models in use today.
Journal ArticleDOI
Hydrostatic, quasi‐hydrostatic, and nonhydrostatic ocean modeling
TL;DR: In this paper, the Navier Stokes model on the sphere has been used to model the global circulation of the ocean, from the convective scale to the global scale, and a solution strategy has been proposed to deal with small-scale phenomena which are not in hydrostatic balance.