First records of winter sea ice concentration in the southwest Pacific sector of the Southern Ocean

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dc.contributor.authorFerry, AJen_AU
dc.contributor.authorCrosta, Xen_AU
dc.contributor.authorQuilty, PGen_AU
dc.contributor.authorFink, Den_AU
dc.contributor.authorHoward, Wen_AU
dc.contributor.authorArmand, LKen_AU
dc.date.accessioned2021-12-16T02:57:37Zen_AU
dc.date.available2021-12-16T02:57:37Zen_AU
dc.date.issued2015-10-15en_AU
dc.date.statistics2021-11-14en_AU
dc.description.abstractWe use a Generalized Additive Model (GAM) to provide the first winter sea ice concentration record from two cores located within the southwest Pacific sector of the Southern Ocean. To compliment the application of GAM, a time series analysis on satellite records of sea ice concentration data was used to extend the standard 13.25 year time series used for paleoceanography. After comparing GAM sea ice estimates with previously published paleo sea ice data we then focus on a new paleo winter sea ice record for marine sediment core E27-23 (59°37.1'S, 155°14.3'E), allowing us to provide a more comprehensive view of winter sea ice dynamics for the southwest Pacific Ocean. The paleo winter sea ice concentration estimates provide the first suggestion that winter sea ice within the southwestern Pacific might have expanded during the Antarctic Cold Reversal. Throughout the Holocene, core E27-23 documents millennial scale variability in paleo winter sea ice coverage within the southwest Pacific. Holocene winter sea ice expansion may have resulted from the Laurentide Ice Sheet deglaciation, increased intensity of the westerly winds, as well as a northern migration of the Subtropical and/or Sub-Antarctic Fronts. Brief consideration is given to the development of a paleo summer sea ice proxy. We conclude that there is no evidence that summer sea ice ever existed at core sites SO136-111 and E27-23 over the last 220 and 52,000 years, respectively. ©2015. American Geophysical Union.en_AU
dc.identifier.citationFerry, A. J., Crosta, X., Quilty, P. G., Fink, D., Howard, W., & Armand, L. K. (2015). First records of winter sea ice concentration in the southwest Pacific sector of the Southern Ocean. Paleoceanography and Paleoclimatology, 30(11), 1525-1539. doi:10.1002/2014PA002764en_AU
dc.identifier.issn2572-4525en_AU
dc.identifier.issue11en_AU
dc.identifier.journaltitlePaleoceanography and Paleoclimatologyen_AU
dc.identifier.pagination1525-1539en_AU
dc.identifier.urihttps://doi.org/10.1002/2014PA002764en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12486en_AU
dc.identifier.volume30en_AU
dc.language.isoenen_AU
dc.publisherAmerican Geophysical Unionen_AU
dc.subjectSedimentsen_AU
dc.subjectDiatomsen_AU
dc.subjectIceen_AU
dc.subjectSeasen_AU
dc.subjectQuaternary perioden_AU
dc.subjectAntarctic regionsen_AU
dc.titleFirst records of winter sea ice concentration in the southwest Pacific sector of the Southern Oceanen_AU
dc.typeJournal Articleen_AU
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