The Fiordland Current, southwest New Zealand: mean, variability, and trends

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dc.contributor.author Chandler, M en
dc.contributor.author Bowen, Melissa en
dc.contributor.author Smith, RO en
dc.date.accessioned 2019-10-08T09:07:57Z en
dc.date.issued 2019 en
dc.identifier.issn 0028-8330 en
dc.identifier.uri http://hdl.handle.net/2292/48493 en
dc.description.abstract The mean, interannual variability, decadal variability, and longer-term trends in the across-track geostrophic velocity of the poleward-flowing boundary current along the Fiordland coast (the Fiordland Current, FC) are examined over the altimeter record (September 1992–May 2017). In the mean, the FC is southwestward, with stronger velocities in an inner current near the coast and weaker velocities in an outer current further offshore. Examination of the alongshore momentum balance suggests that the mean flow is driven by a poleward downsloping alongshore pressure gradient. At interannual time-scales, variability in the FC was correlated with the alongshore wind stress, indicating that an equatorward (poleward) wind stress drives an equatorward (poleward) velocity anomaly. At decadal time-scales, variability in the FC was correlated with the South Pacific wind stress curl, indicating that as the wind stress curl increases (decreases) the poleward flow in the FC weakens (strengthens), consistent with the response of a traditional eastern boundary current. Long-term trends show a weakening outer current and strengthening inner current. Increasing flow in the inner current may result in increased transport of subtropical water around southern New Zealand. en
dc.publisher Royal Society of New Zealand en
dc.relation.ispartofseries New Zealand Journal of Marine and Freshwater Research en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.title The Fiordland Current, southwest New Zealand: mean, variability, and trends en
dc.type Journal Article en
dc.identifier.doi 10.1080/00288330.2019.1629467 en
dc.rights.holder Copyright: The author en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Article en
pubs.elements-id 775326 en
pubs.org-id Science en
pubs.org-id School of Environment en
pubs.record-created-at-source-date 2019-06-23 en
pubs.online-publication-date 2019-06-16 en


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