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dc.contributor.authorJohnston, Barbara M
dc.contributor.authorGabric, Albert J
dc.date.accessioned2017-05-03T11:27:32Z
dc.date.available2017-05-03T11:27:32Z
dc.date.issued2010
dc.date.modified2011-10-06T04:59:18Z
dc.identifier.issn0280-6495
dc.identifier.doi10.1111/j.1600-0870.2010.00462.x
dc.identifier.urihttp://hdl.handle.net/10072/36127
dc.description.abstractABSTRACT Decadal-scale changes in the meridional circulation of the Southern Ocean south of Australia are studied, over the period 1958-2005, using Simple Ocean Data Assimilation (SODA) reanalysis data. Upper Circumpolar Deep Water (UCDW) is found to upwell nearer to the surface over time, while the mixed layer (ML) is found to deepen, leading to an increase in the number of times that UCDW intrudes into the ML. This entrainment of nutrients, especially iron, into the ML from UCDW, is crucial for primary production and appears to occur predominantly in summer/autumn, contrary to previous reports. ML temperature, density and salinity all show increasing trends in almost all seasons and latitudinal zones within the study region. A notable exception to the general increase in temperature occurs in the most southerly zone 60-65Ӡin summer. An explanation for this apparent anomaly could be related to increased winds (in conjunction with the increasing trend in the Southern Annular Mode), which mix remnant winter water into the ML, negating the surface temperature increase. Unlike trends in ML variables, trends in UCDW variables appear to be decoupled from the surface trends and occur on time-scales that may be centennial rather than decadal.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.format.extent723465 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglish
dc.language.isoeng
dc.publisherWiley-Blackwell Publishing
dc.publisher.placeSweden
dc.relation.ispartofstudentpublicationY
dc.relation.ispartofpagefrom719
dc.relation.ispartofpageto736
dc.relation.ispartofissue5
dc.relation.ispartofjournalTellus Series A: Dynamic Meteorology and Oceanography
dc.relation.ispartofvolume62
dc.rights.retentionY
dc.subject.fieldofresearchAtmospheric sciences
dc.subject.fieldofresearchOceanography
dc.subject.fieldofresearchPhysical oceanography
dc.subject.fieldofresearchcode3701
dc.subject.fieldofresearchcode3708
dc.subject.fieldofresearchcode370803
dc.titleLong-term trends in upper ocean structure and meridional circulation of the Southern Ocean south of Australia derived from the SODA reanalysis
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, School of Natural Sciences
gro.rights.copyright© 2010 the Authors and Blackwell Munksgaard. This is the author-manuscript version of the paper. Reproduced in accordance with the copyright policy of the publisher.The definitive version is available at www.interscience.wiley.com
gro.date.issued2010
gro.hasfulltextFull Text
gro.griffith.authorGabric, Albert J.
gro.griffith.authorJohnston, Barbara M.


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