Subantarctic oceanography around New Zealand: Preliminary results from an ongoing survey

Morris, Michele Y.; Stanton, Basil R.; Neil, Helen L

doi:10.1080/00288330.2001.9517018

Cited by 113 publications

(162 citation statements)

References 13 publications

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“…winter. This is consistent with the theory that SAMW forms on the northern side of the SAF (e.g., McCartney, 1977;Butler et al, 1992;Morris et al, 2001;Sallée et al, 2006;Hasson et al, 2011). However, Heath (1981Heath ( , 1985's hypothesis of SAMW forming over the Campbell Plateau cannot be excluded.…”

Section: Water Massessupporting

confidence: 77%

“…Whether SAMW is formed south of New Zealand has been discussed for decades: Heath (1981Heath ( , 1985 suggests SAMW is formed over the plateau 30 by deep vertical mixing. In contrast, Morris et al (2001) proposes that SAMW found on the plateau is replenished by an inflow of dense water formed north of the SAF. Deep waters will be mentioned in the text, but are not the focus of the paper.…”

mentioning

confidence: 93%

“…However, the surface water 25 between the two fronts is not routinely considered a distinct water mass and has been described as "in transition" between both water masses (e.g., Carter et al, 2008;Chiswell et al, 2015). Another example is SAMW and AAIW, intermediate waters that form in the SAZ (e.g., McCartney, 1977;Morris et al, 2001;Talley et al, 2011;Bostock et al, 2013). However, the roles, presence and formation spots of these water masses on, or adjacent to, Campbell Plateau remains unclear.…”

mentioning

confidence: 99%

“…They are forced to pass through gaps in the Macquarie Ridge, and merge where the 10 SAF impinges on Campbell Plateau (e.g., Morris et al, 2001;Sokolov et al, 2006;Rintoul et al, 2014). Downstream, the flow divides into two branches, the northern branch following the plateau bathymetry and the middle and southern branches turning sharply to the south east at ∼ 164°E (e.g., Davis, 1998;Morris et al, 2001;Stanton and Morris, 2004;Sokolov and Rintoul, 2007). However, identification of the Southern Ocean fronts is not a straight forward task.…”

mentioning

confidence: 99%

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Campbell Plateau: A major control on the SW Pacific sector of the Southern Ocean circulation

Forcén-Vázquez

Williams²,

Bowen

et al. 2017

Preprint

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Section: Water Massessupporting

confidence: 77%

mentioning

confidence: 93%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Campbell Plateau: A major control on the SW Pacific sector of the Southern Ocean circulation

Forcén-Vázquez

Williams²,

Bowen

et al. 2017

Preprint

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“…Part of this flow turns eastward along the southern flank of Chatham Rise, while a component continues north through Mernoo Saddle. Campbell Plateau is characterized by weak mean flows but cyclonic flow is well developed around western Bounty Trough [18].…”

Section: Oceanographic Outlinementioning

confidence: 99%

Planktonic Foraminifera as Oceanographic Proxies: Comparison of Biogeographic Classifications Using Some Southwest Pacific Core-Top Faunas

Scott

2013

ISRN Oceanography

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The distribution of planktonic foraminifera, as free-floating protists, is largely controlled by hydrography. Their death assemblages in surficial sediments provide proxy data on upper water mass properties for paleoceanography. Techniques for mapping faunal distributions for this purpose are compared in a study of 35 core-top samples that span the Subtropical Front in the Southwest Pacific. Faunas are analyzed by taxon composition, order of dominant taxa, and abundance. Taxon composition (presence-absence data) and dominant taxa (ordinal data) recognize groups of sites that approximate major water mass distributions (cool subtropical water, subantarctic water) and clearly define the location of the Subtropical Front. Quantitative data (relative abundances) more closely reflect the success of taxa in upper water mass niches. This information resolves groups of sites that reflect differences in intrawater mass hydrography. Comparisons suggest that abundance data should provide much better oceanographic resolution globally than the widely used ordinal biogeographic classification that identifies only Tropical, Subtropical Transitional, Subpolar and Polar provinces. As the data are strongly structured by variance in the abundance of Globigerina bulloides, Globorotalia inflata, Neogloboquadrina incompta, and Neogloboquadrina pachyderma, comparable classifications result from most clustering strategies. Principal coordinates analysis best represents the configuration of sites in two dimensions.

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Intensification and variability of the confluence of subtropical and subantarctic boundary currents east of New Zealand

2014

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The confluence of subtropical and subantarctic boundary currents east of New Zealand creates strong fronts. The fronts have clear signatures in sea surface height (SSH) and sea surface temperature (SST) which make the confluence a good region to investigate the variability of the boundary currents of the South Pacific. Analysis of the 20 year time series of the SSH is used to investigate the location and strength of fronts, measured as the gradient in SSH (rSSH), and the eddy kinetic energy (EKE) and their relationship to local and large-scale wind forcing. The intensity of the rSSH and the EKE have increased at a rate of 0.02 cm km 21 and 32 cm 2 s 22 decade 21 , respectively. There is a significant correlation (r 5 0.7, p < 0.01) between the rSSH and EKE signals, reflecting baroclinic instabilities inherent in the fronts. Differences between northward and southward wind-driven transports across the confluence from the Island Rule are also increasing at 7.5 Sv decade 21 along with an upward trend in the SST differences across the region.Time series of the Southern Annular Mode (SAM) and Southern Oscillation Index (SOI) and local winds were compared to the frontal strength. Although the positive trend in the SOI coincides with increasing subtropical inflows, there is little correspondence of the indices and local winds with short-term variability. While these results indicate a connection between the intensification of the confluence and South Pacific winds, there is little change in frontal location north of Bollons Seamount which suggests bathymetry influences the location of the confluence.

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Subantarctic oceanography around New Zealand: Preliminary results from an ongoing survey

Cited by 113 publications

References 13 publications

Campbell Plateau: A major control on the SW Pacific sector of the Southern Ocean circulation

Campbell Plateau: A major control on the SW Pacific sector of the Southern Ocean circulation

Planktonic Foraminifera as Oceanographic Proxies: Comparison of Biogeographic Classifications Using Some Southwest Pacific Core-Top Faunas

Intensification and variability of the confluence of subtropical and subantarctic boundary currents east of New Zealand

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