Coastal Upwelling, Cyclogenesis and Squid Fishing Near Cape Farewell, New Zealand

Bowman, Malcolm J.; Chiswell, Stephen M.; Lapennas, P. L.; Murtagh, R. A.; Foster, B. A.; Wilkinson, Vaughan H.; Battaerd, W. R.

doi:10.1007/978-1-4615-6648-9_16

Cited by 26 publications

(41 citation statements)

References 22 publications

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“…Southward advection of warmer waters by the East Auckland and East Cape currents shows up in most months, although there is some variation from month to month. Some of the monthly means (e.g., June) show cooler water along the west coast of the South Island, probably caused by upwelling and or tidal mixing (Bowman et al 1983). On occasion (e.g., August and December), there is a suggestion of southward flow off the west coast of the South Island, as noted by Rahmstorf (1992).…”

Section: Sst From April 1989 To March 1991mentioning

confidence: 99%

Variability in sea surface temperature around New Zealand from AVHRR images

Chiswell

1994

New Zealand Journal of Marine and Freshwater Research

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Multi-channel Advanced Very-High Resolution Radiometer (AVHRR) images of sea surface temperature (SST) in the New Zealand region have been archived since 1989. The first 2 years of data are used to investigate the variability in sea surface temperature (SST) and its gradients around New Zealand. Empirical orthogonal function (EOF) analyses show that the annual cycle accounts for 92% of the variance of SST, but for less of the variance in SST gradient. The Southland and Subantarctic Fronts have an annual modulation in their strengths, accounting for about 20% of their variance; these modulations are out of phase, with the Southland Front being strongest in winter. The Subtropical Convergence shows variability that cannot be easily described by one mode, but appears to migrate meridionally with an annual period, being furthest north in March.

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Section: Sst From April 1989 To March 1991mentioning

confidence: 99%

Variability in sea surface temperature around New Zealand from AVHRR images

Chiswell

1994

New Zealand Journal of Marine and Freshwater Research

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“…This phenomenon can be common in nature since aquatic environments have been shown to be extremely heterogeneous. In addition to very changeable transient spatial patterns, many more stable structures also exist, associated with ocean fronts [32,33], cyclonic rings [34] and so-called meddies [35]. Spatial heterogeneity has also been found in offshore marine areas, lakes and rivers [36,37,38,39,40].…”

Section: Discussionmentioning

confidence: 99%

From Bistability to Coupling-Induced Oscillations in a Two-Habitat Model for the Rotifer Population Dynamics

Medvinsky

Gonik

Rusakov

et al. 2008

Math. Model. Nat. Phenom.

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Abstract. We study the role of interactions between habitats in rotifer dynamics. For this purpose we use a modified version of the Consensus model. The Consensus model has been shown to be realistic enough to reproduce distinguishing features of the rotifer species dynamics. Being uncoupled, intrinsically bistable rotifer populations, which inhabit the regions under different environmental conditions, do not impact each other. We show that migration of the rotifers between the habitats leads to the transformation of bistability to oscillatory dynamics. The coupling-induced oscillations of the rotifer biomass are shown to be either regular or irregular depending on the value of the model parameters, which describe environmental conditions and the biomass exchange between the habitats. We show that the irregular oscillations are characterized by positive values of the Lyapunov exponent, which means that they are chaotic.

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“…This plume appears to be a relatively persistent summer feature of the area between North and South Islands bounded to the west by a line between Capes Egmont and Farewell (here called "greater Cook Strait") (Stanton 1971(Stanton , 1976Bowman et al 1983). This area was first studied in an integrated manner during the Maui Development Study (see e.g., Bowman et al 1982Bowman et al ,1983Foster & Battaerd 1985). Some of the largest zooplankton biomasses recorded in New Zealand coastal waters have been found in greater Cook Strait (Bradford 1980), sustained in part by the cold nutrient-rich water of the upwelling plume (Bowman et al 1982;Bradford et al 1986).…”

Section: Introductionmentioning

confidence: 98%

“…Some of the largest zooplankton biomasses recorded in New Zealand coastal waters have been found in greater Cook Strait (Bradford 1980), sustained in part by the cold nutrient-rich water of the upwelling plume (Bowman et al 1982;Bradford et al 1986). This region is also the site of a productive squid fishery where fishers are reported to concentrate their efforts in regions of sharp temperature gradients associated with the boundaries of old pulses of upwelled water (Bowman et al 1983).…”

Section: Introductionmentioning

confidence: 99%

Composition of macrozooplankton assemblages associated with the formation and decay of pulses within an upwelling plume in greater Cook Strait, New Zealand

Bradford‐Grieve¹,

Murdoch²,

Chapman³

1993

New Zealand Journal of Marine and Freshwater Research

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The structure of macrozooplankton assemblages associated with an upwelling plume was studied at an active upwelling site located in greater Cook Strait, New Zealand. Zooplankton within the plume divided into five geographically coherent assemblages, generally reflecting temporal changes in the zooplankton community as the upwelled water of the plume advected from west to east into greater Cook Strait-as indicated by the movement of three separate pulses of upwelled water. Near the source of the upwelling plume, inshore zooplankton biomass decreased as did the numbers of several coastal species, and oceanic species were introduced into nearshore waters. The capacity of copepods and the euphausiid Nyctiphanes australis to reproduce was reduced, and the diversity indices and proportion of herbivorous copepods decreased, relative to water south of the plume. Downstream from the plume source, in the eastern part of the upwelling plume, many zooplankton species were distributed in a manner reflecting the physical characteristics of the plume, whereas oceanic forms were entrained along the offshore border of the plume. The proportion of omnivorous copepods was reduced and the capacity of herbivorous copepods and Nyctiphanes australis to reproduce increased. The abundance of selected coastal copepods was apparently related to their vulnerability to offshore transport on an upwelling coast. A comparison of the Kahurangi and Mauritanian Received 12 February 1992; accepted 17 November 1992 upwelling plumes suggests that the upwelled new nitrogen is converted to zooplankton biomass more efficiently in greater Cook Strait. M92008

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Coastal Upwelling, Cyclogenesis and Squid Fishing Near Cape Farewell, New Zealand

Cited by 26 publications

References 22 publications

Variability in sea surface temperature around New Zealand from AVHRR images

Variability in sea surface temperature around New Zealand from AVHRR images

From Bistability to Coupling-Induced Oscillations in a Two-Habitat Model for the Rotifer Population Dynamics

Composition of macrozooplankton assemblages associated with the formation and decay of pulses within an upwelling plume in greater Cook Strait, New Zealand

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