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dc.contributor.authorJohnston, Barbara M
dc.contributor.authorGabric, Albert J
dc.date.accessioned2017-05-03T11:27:33Z
dc.date.available2017-05-03T11:27:33Z
dc.date.issued2011
dc.date.modified2011-09-30T04:20:19Z
dc.identifier.issn1600-0889
dc.identifier.doi10.1111/j.1600-0889.2011.00526.x
dc.identifier.urihttp://hdl.handle.net/10072/41045
dc.description.abstractChanges in biological productivity in the Southern Ocean have the potential to have a significant effect on world climate. Here we use a combination of satellite, model and model reanalysis data to examine climate variability in the Australian sector of the Southern Ocean (110-160Ŭ 40-70ө to identify the controls on chlorophyll-a (a proxy for phytoplankton biomass) and primary productivity and evaluate trends in these controls over the period 1997-2007. In summer, in the 65-70Ӡzone, sea-ice concentration together with the Southern Annular Mode explains 51% of the variance in chlorophyll-a, while mean wind stress and sea-surface temperature explains 55% of the variance in the 60-65Ӡzone. Further north, key controls are photosynthetically active radiation, sea-surface temperature, mixed layer depth and stratification. Trends in hydrodynamic variables are found to often be opposite in sign and up to an order of magnitude larger than those previously identified in the same sector for 1958-2005. Allowing for the effect of shorter time series on the magnitude of the trends, many recent trends seem to be outside the range of previous variability. These results are consistent with a shift in the ocean state in the past 10-15 yr, in response to a shift in climate.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoeng
dc.publisherWiley-Blackwell Publishing, Inc.
dc.publisher.placeUnited States
dc.relation.ispartofstudentpublicationY
dc.relation.ispartofpagefrom266
dc.relation.ispartofpageto286
dc.relation.ispartofissue2
dc.relation.ispartofjournalTellus Series B: Chemical and Physical Meteorology
dc.relation.ispartofvolume63
dc.rights.retentionY
dc.subject.fieldofresearchAtmospheric sciences
dc.subject.fieldofresearchBiological oceanography
dc.subject.fieldofresearchcode3701
dc.subject.fieldofresearchcode370801
dc.titleInterannual variability in estimated biological productivity in the Australian sector of the Southern Ocean in 1997–2007
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, School of Natural Sciences
gro.date.issued2011
gro.hasfulltextNo Full Text
gro.griffith.authorGabric, Albert J.
gro.griffith.authorJohnston, Barbara M.


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