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Ocean Science An interactive open-access journal of the European Geosciences Union

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© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
15 May 2017
Review status
This discussion paper is under review for the journal Ocean Science (OS).
Campbell Plateau: A major control on the SW Pacific sector of the Southern Ocean circulation
Aitana Forcén-Vázquez1,2, Michael J. M. Williams1, Melissa Bowen3, Lionel Carter2, and Helen Bostock1 1NIWA
2Victoria University of Wellington
3The University of Auckland
Abstract. New Zealand’s subantarctic region is a dynamic oceanographic zone with the Subtropical Front (STF) to the north and the Subantarctic Front (SAF) to the south. Both the fronts and their associated currents are strongly influenced by topography: the South Island of New Zealand and the Chatham Rise for the STF, and Macquarie Ridge and Campbell Plateau for the SAF. Here for the first time we present a consistent picture across the subantarctic region of the relationships between front positions, bathymetry and water mass structure using eight high resolution oceanographic sections that span the region. Our results show that the northwest side of Campbell Plateau is comparatively warm due to a southward extension of the STF over the plateau. The SAF is steered south and east by Macquarie Ridge and Campbell Plateau, with waters originating in the SAF also found north of the plateau in the Bounty Trough. Subantarctic Mode Water (SAMW) formation is confirmed to exist south of the plateau on the northern side of the SAF in winter, while on Campbell Plateau a deep reservoir persists into the following autumn. Antarctic Intermediate Water (AAIW) is observed in the deeper regions around the edges of the plateau, but not on the plateau, confirming that the waters on the plateau are effectively isolated from AAIW and deeper water masses that typify the open Southern Ocean waters.

Citation: Forcén-Vázquez, A., Williams, M. J. M., Bowen, M., Carter, L., and Bostock, H.: Campbell Plateau: A major control on the SW Pacific sector of the Southern Ocean circulation, Ocean Sci. Discuss., doi:10.5194/os-2017-36, in review, 2017.
Aitana Forcén-Vázquez et al.
Aitana Forcén-Vázquez et al.
Aitana Forcén-Vázquez et al.


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