Radiolarian abundance of sediment core Y8, 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

• Main Authors: Lüer, Vanessa, Cortese, Giuseppe, Neil, Helen L, Hollis, Christopher J, Willems, Helmut
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 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; Hexacontium aristarchi; Hexacontium armatum/hostile group; Hexacontium laevigatum; Hexacontium spp.; Hexastylus spp.; Hexastylus triaxonius; Prunopyle titan; Prunopyle spp.; Rhizoplegma boreale; Saturnalis circularis; Stylatractus spp. group; Stylosphaera melpomene; Thecosphaera inermis; Thecosphaera spp.; Phacodiscidae; Heliodiscus asteriscus; Sethodiscus macrococcus; Spongodiscidae; Amphirhopalum ypsilon; Circodiscus microporus; Dictyocoryne profunda; Euchitonia elegans/furcata group; Porodiscus sp.; Schizodiscus spatangus; Spongocore puella; Spongodiscus resurgens; Spongopyle osculosa; Spongotrochus glacialis; Spongotrochus venustum; Spongurus sp.; Spongurus pylomaticus; Stylochlamidium asteriscus; Stylochlamidium spp.; Stylodictya aculeata; Stylodictya validispina; Styptosphaera spumacea; Pylonidae; Dipylissa bensoni; Octopyle stenozona; Phorticium clevei; Phorticium pylonium group; Pylolena armata; Streblacantha circumtexta; Tetrapyle octacantha; Litheliidae; Larcopyle buetschlii; Larcopyle spp.; Larcospira quadrangula; Lithelius minor group; Lithelius nautiloides; Lithelius spp.; Lithocarpium sp.; Ommatodiscus cf. haeckeli; Pylospira octopyle; Coccodiscidae; Didymocyrtis tetrathalamus; Didymocyrtis sp. cf. D. tetrathalamus; Tholonidae; Cubotholus spp.; Nassellaria; Plagoniidae; Amphiplecta acrostoma; Antarctissa cylindrica; Antarctissa denticulata; Antarctissa longa; Antarctissa sp. cf. denticulata; Antarctissa spp.; Antarctissa strelkovi; Arachnocorallium calvata; Arachnocorys umbellifera; Ceratocyrtis galeus; Ceratocyrtis histricosus; Ceratocyrtis spp.; Cladoscenium ancoratum; Cladoscenium sp. cf. C. tricolpium; Clathrocanium coarctatum; Clathrocorys murrayi; Lampromitra cracenta; Lampromitra quadricuspis; Lampromitra schultzei; Lampromitra spp.; Lithomelissa hystrix; Lithomelissa thoracites; Lithomelissa laticeps; Lithomelissa borealis; Lithomelissa sp.; Lithomelissa spp.; Lithomelissa stigi; Lophophaena buetschlii; Lophophaena hispida; Lophophaena spp.; Mitrocalpis araneafera; Neosemantis distephanus; Phormacantha hystrix; Peridium longispinum; Peromelissa phalacra; Plagoniidae group; Plectacantha sp.; Pseudocubus obeliscus; Pseudodictyophimus gracilipes; Sethophormis rotula; Trisulcus spp.; Trisulcus triacanthus; Trissocyclidae; Lophospyris pentagona pentagona; Lophospyris juvenile; Lophospyris spp.; Phormospyris spp.; Phormospyris stabilis scaphipes; Phormospyris stabilis stabilis; Tholospyris rhombus; Triceraspyris antarctica; Triceraspyris sp. cf. T. antarctica; Zygocircus productus group; Carpocaniidae; Carpocanarium papillosum group; Carpocanistrum acutidentatum; Carpocanistrum spp.; Theoperidae; Archipilium macroporus; Artostrobus annulatus; Artostrobus joergenseni; Bathropyramis woodringi; Cornutella bimarginata; Cornutella profunda; Corocalyptra alcmenae; Corocalyptra cervus/gegenbauri; Corocalyptra columba; Cycladophora bicornis; Cycladophora davisiana; Cyrtopera laguncula; Dictyophimus bicornis; Dictyophimus platicephalus; Dictyophimus hirundo; Dictyophimus infabricatus; Dictyophimus spp.; Eucyrtidium acuminatum acuminatum; Eucyrthidium acuminatum octocolum; Eucyrtidium anomalum; Eucyrtidium annulatum; Eucyrtidium hexagonatum; Eucyrtidium hexastichum; Eucyrtidium matuyamai; Eucyrtidium spp.; Eucyrtidium teuscheri; Gondwanaria dogieli; Lipmanella bombus; Lipmanella dictyoceras; Litharachnium tentorium; Lithostrobus hexagonalis; Peripyramis circumtexta; Plectopyramis dodecomma; Pterocanium praetextum group; Pterocanium sp.; Pterocanium spp.; Pterocanium trilobum; Sethoconus tabulatus; Theocorys veneris; Theopilium tricostatum; Pterocoryidae; Androcyclas gamphonycha; Anthocyrtidium ophirense; Anthocyrtidium zanguebaricum; Lamprocyclas maritalis maritalis; Lamprocyclas maritalis polypora; Lamprocyrtis nigriniae; Pterocorys clausus; Pterocorys macroceras; Pterocorys minythorax; Pterocorys sp.; Pterocorys spp.; Pterocorys zancleus; Stichopilium variabile var. davisianoides; Theocorythium trachelium dianae; Theocorythium trachelium trachelium; Artostrobiidae; Botryostrobus auritus/australis; Botryostrobus aquilonaris; Lithocampe furcaspiculata; Phormostichoartus corbula; Lithocampe platycephala; Siphocampe arachnea group; Siphocampe lineata group; Siphocampe nodosaria; Spirocyrtis scalaris group; Spirocyrtis subscalaris; Cannobotryidae; Botryocampe cf. inflata; Botryocampe conythorax; Botryopyle dictyocephalus; Saccospyris antarctica; Phaeodaria; Lirellidae; Euphysetta elegans; Kasten corer; Counting >45 µm fraction; TAN3034; Tangaroa; Geosciences, University of Bremen GeoB; Pacific; New Zealand; Campbell Plateau; Willems; Titan; 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, respectively. This suggests that temperatures during the HCO were comparable to the Eemian, one of the warmest interglacial intervals of the Late Quaternary. Glacials are characterized by less diverse radiolarian faunas with cool-water taxa increasing to 49% of the assemblage. Coolest climate conditions occurred in MIS 4 and 2 where SSTs are reduced to 5.4 °C and 4.3 °C, respectively. Radiolarian faunal changes and SST estimates clearly identify major water masses and oceanic fronts in the offshore eastern New Zealand area. During warmest MIS 5.5 and early MIS 1 substantial influence of northern-sourced Subtropical Surface Water (STW) is evident at Site Y8. This implies southward incursions of STW around the eastern crest of Chatham Rise with the STF displaced towards higher latitudes and spinning off eddies as far south as Campbell Plateau. Additionally, increased flow of the Southland Current (SC) might have enhanced the local occurrence of warm-water radiolarians derived from the subtropical Tasman Sea. Coolest glacials are marked by a strong inflow of cool, southern-sourced waters at Site Y8 indicating a more vigorous flow along the Subantarctic Front (SAF).