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Record #179566:

The role of eddies in determining the structure and response of the wind-driven southern hemisphere overturning: results from the Modelling Eddies in the Southern Ocean (MESO) project / Robert Hallberg, Anand Gnanadesikan.

Title: The role of eddies in determining the structure and response of the wind-driven southern hemisphere overturning: results from the Modelling Eddies in the Southern Ocean (MESO) project / Robert Hallberg, Anand Gnanadesikan.
Author(s): Hallberg, Robert.
Gnanadesikan, Anand.
Date: 2006.
In: Journal of Physical Oceanography. (2006.), Vol. 36(12) (2006)
Abstract: Uses numerical sensitivity studies to examine role played by Southern Ocean winds and eddies in determining density structure of global ocean and magnitude and structure of global overturning circulation. Results indicate that explicit eddies affect both structure of overturning and response of overturning to wind stress changes. Presence of resolved eddies alters overturning cells involving Southern Ocean transformation of dense deep waters and light waters of sub-tropical origin into intermediate waters; extends surface-to-intermediate water cell farther south by hundreds of kilometres and causes deep-to-intermediate cell to draw on comparatively lighter deep waters. Overturning response to changes in winds is also sensitive to presence of eddies. In non-eddying simulation, changing Ekman transport produces comparable changes in overturning, involving transformation of deep waters and resembling mean circulation. In eddy-permitting simulations, significant faction of Ekman transport changes are compensated by eddy-induced transport drawing from lighter waters than does mean overturning. Results call into question ability of coarse-resolution ocean models to accurately capture impact of changes in Southern Ocean on global ocean circulation, of potential importance for climatically relevant processes including heat transport and storage, and carbon storage in the interior.
Notes:

Journal of Physical Oceanography. Vol. 36(12) :2232-2252 (2006).

Keywords: 551.46 -- Oceanography, physical.
519.673 -- Modelling.
551.465 -- Oceanography, dynamics.
551.465.15 -- Turbulence and eddies.
551.465.4 -- Oceanography, stratification.
551.465.45 -- Water masses.
551.465.7 -- Oceanography, energy budget.
551.463.6 -- Sea water, thermal properties and heat flux.
551.464 -- Sea water, chemical properties.
546.26 -- Carbon.
C -- Oceanography, hydrography and hydrology.
(*7) -- Antarctic regions.
(*80) -- Southern Ocean.
SPRI record no.: 179566

MARCXML

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100 1# ‡aHallberg, Robert.
245 14 ‡aThe role of eddies in determining the structure and response of the wind-driven southern hemisphere overturning :‡bresults from the Modelling Eddies in the Southern Ocean (MESO) project /‡cRobert Hallberg, Anand Gnanadesikan.
260 ## ‡a[S.l.] :‡b[s.n.],‡c2006.
300 ## ‡ap. 2232-2252 :‡bill., diags., maps.
500 ## ‡aJournal of Physical Oceanography. Vol. 36(12) :2232-2252 (2006).
520 3# ‡aUses numerical sensitivity studies to examine role played by Southern Ocean winds and eddies in determining density structure of global ocean and magnitude and structure of global overturning circulation. Results indicate that explicit eddies affect both structure of overturning and response of overturning to wind stress changes. Presence of resolved eddies alters overturning cells involving Southern Ocean transformation of dense deep waters and light waters of sub-tropical origin into intermediate waters; extends surface-to-intermediate water cell farther south by hundreds of kilometres and causes deep-to-intermediate cell to draw on comparatively lighter deep waters. Overturning response to changes in winds is also sensitive to presence of eddies. In non-eddying simulation, changing Ekman transport produces comparable changes in overturning, involving transformation of deep waters and resembling mean circulation. In eddy-permitting simulations, significant faction of Ekman transport changes are compensated by eddy-induced transport drawing from lighter waters than does mean overturning. Results call into question ability of coarse-resolution ocean models to accurately capture impact of changes in Southern Ocean on global ocean circulation, of potential importance for climatically relevant processes including heat transport and storage, and carbon storage in the interior.
650 07 ‡a551.46 -- Oceanography, physical.‡2udc
650 07 ‡a519.673 -- Modelling.‡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 ‡a551.465.7 -- Oceanography, energy budget.‡2udc
650 07 ‡a551.463.6 -- Sea water, thermal properties and heat flux.‡2udc
650 07 ‡a551.464 -- Sea water, chemical properties.‡2udc
650 07 ‡a546.26 -- Carbon.‡2udc
650 07 ‡aC -- Oceanography, hydrography and hydrology.‡2local
651 #7 ‡a(*7) -- Antarctic regions.‡2udc
651 #7 ‡a(*80) -- Southern Ocean.‡2udc
700 1# ‡aGnanadesikan, Anand.
773 0# ‡7nnas ‡tJournal of Physical Oceanography. ‡gVol. 36(12) (2006) ‡wSPRI-78712
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