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Record #188778:

The Southern Ocean overturning: parameterized versus permitted eddies / Paul Spence, and 3 others.

Title: The Southern Ocean overturning: parameterized versus permitted eddies / Paul Spence, and 3 others.
Author(s): Spence, Paul.
Date: 2009.
In: Journal of Physical Oceanography. (2009.), Vol. 39(7) (2009)
Abstract: Evaluation of resolution dependence of Southern Ocean meridional overturning circulation using four versions of same global climate model show that at coarse resolutions North Atlantic Deep Water tends to upwell diabatically at low latitudes, so that Southern Ocean is weakly coupled with rest of ocean. As resolution increases and eddy effects become less parameterized interior circulation becomes more adiabatic and deep water increasingly upwells by flowing along isopycnals in Southern Ocean, despite each model having same vertical diffusivity profile. Separating overturning circulation into mean and eddy-induced components demonstrates that both permitted and parameterized eddies induce overturning cells with mass fluxes across mean isopycnals. For some density classes transformation rate derived from surface buoyancy fluxes can provide proxy for net meridional transport in upper Southern Ocean. Investigation of changes in overturning in response to poleward-intensifying Southern Hemisphere winds concomitant with increasing atmospheric CO₂ through 21st century suggests that circulation associated with formation of Antarctic Intermediate Water is likely to strengthen or stay essentially unchanged, rather than to slow down.
Notes:

Journal of Physical Oceanography. Vol. 39(7) :1, 634-1, 651 (2009).

Keywords: 551.46 -- Oceanography, physical.
551.465 -- Oceanography, dynamics.
551.465.15 -- Turbulence and eddies.
551.465.4 -- Oceanography, stratification.
551.465.45 -- Water masses.
551.465.46 -- Upwelling.
519.673 -- Modelling.
C -- Oceanography, hydrography and hydrology.
(*7) -- Antarctic regions.
(*80) -- Southern Ocean.
SPRI record no.: 188778

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245 14 ‡aThe Southern Ocean overturning :‡bparameterized versus permitted eddies /‡cPaul Spence, and 3 others.
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300 ## ‡ap. 1, 634-1, 651 :‡bill., diags., table.
500 ## ‡aJournal of Physical Oceanography. Vol. 39(7) :1, 634-1, 651 (2009).
520 3# ‡aEvaluation of resolution dependence of Southern Ocean meridional overturning circulation using four versions of same global climate model show that at coarse resolutions North Atlantic Deep Water tends to upwell diabatically at low latitudes, so that Southern Ocean is weakly coupled with rest of ocean. As resolution increases and eddy effects become less parameterized interior circulation becomes more adiabatic and deep water increasingly upwells by flowing along isopycnals in Southern Ocean, despite each model having same vertical diffusivity profile. Separating overturning circulation into mean and eddy-induced components demonstrates that both permitted and parameterized eddies induce overturning cells with mass fluxes across mean isopycnals. For some density classes transformation rate derived from surface buoyancy fluxes can provide proxy for net meridional transport in upper Southern Ocean. Investigation of changes in overturning in response to poleward-intensifying Southern Hemisphere winds concomitant with increasing atmospheric CO₂ through 21st century suggests that circulation associated with formation of Antarctic Intermediate Water is likely to strengthen or stay essentially unchanged, rather than to slow down.
530 ## ‡aAlso issued online ‡uurn:doi:10.1175/2009JPO4120.1‡uhttps://dx.doi.org/10.1175/2009JPO4120.1
650 07 ‡a551.46 -- Oceanography, physical.‡2udc
650 07 ‡a551.465 -- Oceanography, dynamics.‡2udc
650 07 ‡a551.465.15 -- Turbulence and eddies.‡2udc
650 07 ‡a551.465.4 -- Oceanography, stratification.‡2udc
650 07 ‡a551.465.45 -- Water masses.‡2udc
650 07 ‡a551.465.46 -- Upwelling.‡2udc
650 07 ‡a519.673 -- Modelling.‡2udc
650 07 ‡aC -- Oceanography, hydrography and hydrology.‡2local
651 #7 ‡a(*7) -- Antarctic regions.‡2udc
651 #7 ‡a(*80) -- Southern Ocean.‡2udc
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