Evolution of the southwestern Pacific surface waters during

Details of Research

TitleEvolution of the southwestern Pacific surface waters during the early PleistoceneAbstractWe present alkenone-derived sea surface temperature (SST) records from the New Zealand/Tasmania sector of the Southern Ocean (ODP Sites 1171 and 1125) during the Early Pleistocene (c. 1.7 to 0.7 Ma). Our data show that the subantarctic surface waters (ODP Site 1171) cooled by c. 4 °C and reached near modern conditions after 0.88 Ma, indicating a long-term northward migration of the Southern Ocean fronts. This long-term cooling occurred in two major steps between 1.25–1.1 Ma and 0.95–0.88 Ma, which correlate with significant increases in Antarctic ice volume and global circulation changes. The comparison between the subantarctic and subtropical SST trends tends to indicate that the Subtropical Front was unstable during the Early Pleistocene with significant southward incursions of subtropical waters during warm interglacials (1.07 Ma and 0.95 Ma identified as MIS31, MIS25). © 2016 The Royal Society of New Zealand.

Details

1st AuthorBeltran, C. AuthorBeltran, C.Ohneiser, C.Hageman, K.Scanlan, E.Year2016JournalNew Zealand Journal of Geology and GeophysicsVolume59Number4Pages514-521DOI10.1080/00288306.2016.1195756URLhttps://www.scopus.com/inward/recor.....fd893c699aa8af4c7c2694837PublisherTaylor and Francis Asia PacificKeywordsalkenoneoceanic frontpaleoceanographyPleistocenesea surface temperature, AustraliaNew ZealandSouthern OceanTasmaniaAuthor KeywordsAlkenone-derived sea surface temperaturesEarly PleistoceneMid-Pleistocene transitionNew Zealand/Tasmania sector of the Southern Oceansubantarctic zoneSubtropical Front

Other

CitationBeltran, C., Ohneiser, C., Hageman, K. and Scanlan, E. (2016). Evolution of the southwestern Pacific surface waters during the early Pleistocene. New Zealand Journal of Geology and Geophysics, 59(4): 514-521