Radiolarian abundance of sediment core Y8 ...

• Main Authors: Lüer, Vanessa, Cortese, Giuseppe, Neil, Helen L, Hollis, Christopher J, Willems, Helmut
• Format: Dataset
• Language: English
• Published: PANGAEA 2009
• Subjects: AGE; DEPTH, sediment/rock; Depth, top/min; Depth, bottom/max; Sample code/label; Spumellaria; Collosphaeridae; Acrosphaera arktios; Acrosphaera cyrtodon; Acrosphaera inflata; Acrosphaera lappacea; Acrosphaera murrayana; Acrosphaera mercurius; Acrosphaera spp.; Acrosphaera spinosa; Collosphaera confossa; Collosphaera huxleyi; Collosphaera macropora; Collosphaera spp.; Disolenia zanguebarica; Siphonosphaera martensi; Siphonosphaera socialis; Actinommidae; Acanthosphaera actinota; Acanthosphaera dodecastyla; Acanthosphaera pinchuda; Acanthosphaera spp.; Actinomma antarcticum; Actinomma arcadophorum; Actinomma delicatulum; Actinomma leptodermum leptodermum; Actinomma leptodermum longispina; Actinomma medianum; Actinomma sol; Actinomma spp.; Actinomma trinacria; Actinosphaera acanthophora; Anomalacantha dentata; Axoprunum bispiculum; Axoprunum stauraxonium; Carposphaera sp. cf. C. capillacea; Cenosphaera cristata; Cenosphaera sp. aff. C. perforata; Cenosphaera spp.; Cromyechinus antarctica; Druppatractus hastatus; Druppatractus irregularis; Druppatractus variabilis; Druppatractus spp.; Haliometta miocenica; Antarc*; Antarctica
• Online Access: https://dx.doi.org/10.1594/pangaea.691487; https://doi.pangaea.de/10.1594/PANGAEA.691487

A high-resolution record of radiolarian faunal changes from Site Y8 south of the Subtropical Front (STF), offshore eastern New Zealand, provides insight into the paleoceanographic history of the last 265 kyrs. Quantitative analysis of radiolarian paleotemperature indicators and radiolarian-based sea surface temperature (SST) estimates reveal distinct shifts during glacial-interglacial (G-I) climate cycles encompassing marine isotope stages (MIS) 8-1. Faunas at Site Y8 are abundant and diverse and consist of a mixture of species typical of the subantarctic, transitional and subtropical zones which is characteristic of subantarctic waters just south of the STF. During interglacials, diverse radiolarian faunas have increased numbers of warm-water taxa (not, vert, similar 15%) while cool-water taxa decrease to not, vert, similar 11% of the assemblage. Warmest climate conditions occurred during MIS 5.5 and the early Holocene Climatic Optimum (HCO) at the onset of MIS 1 where SSTs reach maxima of 12.8 and 12.9 °C, ... : Supplement to: Lüer, Vanessa; Cortese, Giuseppe; Neil, Helen L; Hollis, Christopher J; Willems, Helmut (2009): Radiolarian-based sea surface temperatures and paleoceanographic changes during the Late Pleistocene-Holocene in the subantarctic southwest Pacific. Marine Micropaleontology, 70(3-4), 151-165 ...