Journal ArticleDOI
The Role of Eddies in Determining the Structure and Response of the Wind-Driven Southern Hemisphere Overturning: Results from the Modeling Eddies in the Southern Ocean (MESO) Project
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The Modeling Eddies in the Southern Ocean (MESO) project uses numerical sensitivity studies to examine the role played by Southern Ocean winds and eddies in determining the density structure of the global ocean and the magnitude and structure of global overturning circulation as discussed by the authors.Abstract:
The Modeling Eddies in the Southern Ocean (MESO) project uses numerical sensitivity studies to examine the role played by Southern Ocean winds and eddies in determining the density structure of the global ocean and the magnitude and structure of the global overturning circulation. A hemispheric isopycnal-coordinate ocean model (which avoids numerical diapycnal diffusion) with realistic geometry is run with idealized forcing at a range of resolutions from coarse (2°) to eddy-permitting (1/6°). A comparison of coarse resolutions with fine resolutions indicates that explicit eddies affect both the structure of the overturning and the response of the overturning to wind stress changes. While the presence of resolved eddies does not greatly affect the prevailing qualitative picture of the ocean circulation, it alters the overturning cells involving the Southern Ocean transformation of dense deep waters and light waters of subtropical origin into intermediate waters. With resolved eddies, the surface-t...read more
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Antarctic climate change and the environment
Peter Convey,Robert Bindschadler,G. di Prisco,Eberhard Fahrbach,Julian Gutt,Dominic A. Hodgson,Paul Andrew Mayewski,Colin Summerhayes,John Turner +8 more
TL;DR: The Southern Hemisphere climate system varies on timescales from orbital, through millennial to sub-annual, and is closely coupled to other parts of the global climate system as discussed by the authors.
Journal ArticleDOI
Simulated Climate and Climate Change in the GFDL CM2.5 High-Resolution Coupled Climate Model
Thomas L. Delworth,Anthony Rosati,Whit G. Anderson,Alistair Adcroft,Venkatramani Balaji,Rusty Benson,Keith W. Dixon,Stephen M. Griffies,Hyun Chul Lee,R. C. Pacanowski,Gabriel A. Vecchi,Andrew T. Wittenberg,Fanrong Zeng,Rong Zhang +13 more
TL;DR: This article presented results for simulated climate and climate change from a newly developed high-resolution global climate model [Geophysical Fluid Dynamics Laboratory Climate Model version 2.5 (GFDL CM2.5)] with an atmospheric resolution of approximately 50 km in the horizontal, with 32 vertical levels.
Response of the Antarctic Circumpolar Current to recent climate change
TL;DR: In this paper, the authors analyse the Argo network of profiling floats and historical oceanographic data to detect coherent hemispheric-scale warming and freshening trends that extend to depths of more than 1,000 m.
Journal ArticleDOI
The response of the Antarctic Circumpolar Current to recent climate change
TL;DR: In this article, the authors analyse the Argo network of profiling floats and historical oceanographic data to detect coherent hemispheric-scale warming and freshening trends that extend to depths of more than 1,000 m.
Journal ArticleDOI
Dominance of the Southern Ocean in Anthropogenic Carbon and Heat Uptake in CMIP5 Models
Thomas L. Frölicher,Jorge L. Sarmiento,David Paynter,John P. Dunne,John P. Krasting,Michael Winton +5 more
TL;DR: In this article, the authors assess the uptake, transport, and storage of oceanic anthropogenic carbon and heat over the period1861-2005inanewset ofcoupled carbon-climateEarthsystemmodelsconducted for the fifth phase of the Coupled Model Intercomparison Project (CMIP5), with a particular focus on the Southern Ocean.
References
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Journal ArticleDOI
Global Sea Floor Topography from Satellite Altimetry and Ship Depth Soundings
TL;DR: In this paper, a digital bathymetric map of the oceans with a horizontal resolution of 1 to 12 kilometers was derived by combining available depth soundings with high-resolution marine gravity information from the Geosat and ERS-1 spacecraft.
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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.
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Improved estimates of global ocean circulation, heat transport and mixing from hydrographic data
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TL;DR: These estimates provide a new reference state for future climate studies with rigorous estimates of the uncertainties, and resolve globally vertical mixing across surfaces of equal density.
Journal ArticleDOI
Oceanic Isopycnal Mixing by Coordinate Rotation
TL;DR: In this article, the effect of anisotropic turbulence as diffusive transport along and across density surfaces was modeled by transforming the mixing tensor from a diagonal second-rank tensor in the isopycnal coordinate system to a tensor containing off-diagonal elements in the geopotential coordinate system.