Counts of radiolarians at Hole C9001C ...

• Main Authors: Matsuzaki, Kenji M, Nishi, Hiroshi, Suzuki, Noritoshi, Cortese, Giuseppe, Eynaud, Frédérique, Takashima, Reishi, Kawate, Yumiko, Sakai, Toyusaburo
• Format: Dataset
• Language: English
• Published: PANGAEA 2014
• Subjects: Sample code/label; DEPTH, sediment/rock; Acanthodesmia vinculata; Actinomma boreale; Actinomma leptodermum; Amphirhopalum virchowii; Amphisphaera spumacea; Amphisphaera tanzhiyuani; Archiperidium spp.; Axoprunum acquilonium; Bortyostrobus seriatus; Botryocampe inflata; Botryopera cf. chlamida; Botryostrobus aquilonaris; Carpocanistrum spp.; Cenosphaera sp.; Ceratocyrtis aff. mashae; Ceratocyrtis spinosiretis; Ceratospyris borealis; Ceratospyris problematica; Cinclopyramis murrayana; Cladoccocus dentata; Cladococcus bifurcus; Cycladophora bicornis; Cycladophora davisiana; Cyrtidosphaera reticulata; Dictyocoryne muelleri; Dictyocoryne profunda; Dictyocoryne truncatum; Didymocyrtis tetrathalamus; Eucecryphalus cervus; Eucecryphalus sp.; Eucyrtidium acuminatum; Eucyrtidium frohlichi; Flustrella cf. camerina; Flustrella polygonia; Gondwanaria dogieli; Haliomma miocenica; Heliodiscus cf. tunicatus; Hexacontium pachydermum; Lamprocyclas maritalis; Lamprocyrtis sp.; Lamprotripus sp.; Larcopyle buetschlii; Larcopyle cervicone; Larcopyle spp.; Larcopyle weddellium; Lipmanella irregulare; Lithelius haeckelispiralis; Lithelius nautiloides; Oyashio; Pacific; Subarctic
• Online Access: https://dx.doi.org/10.1594/pangaea.884590; https://doi.pangaea.de/10.1594/PANGAEA.884590

The Northwest Pacific Ocean is characterized by a strong mixing of water masses, due to the interplay of three distinct currents, i.e., the Kuroshio, the Tsugaru, and the Oyashio. The C9001C drill core site, located east of the Shimokita Peninsula and directly influenced by the Tsugaru warm current and the Oyashio subarctic current was used here to reconstruct the paleoceanographical history of this region, especially focusing on the Mid-Brunhes Event (MBE) and its consequences. This core provides a continuous record from marine isotope stage (MIS) 18 (740 ka) to the present. Polycystine radiolarian assemblages were analyzed to highlight paleoceanographic and sea surface temperature changes at this site. Based on the radiolarian fauna, seven time periods are defined, which coincide with changes in the dynamics of the Tsugaru and Oyashio currents, respectively. The oldest time interval covered by our analysis (i.e., VII: 740-621 ka) was marked by generally sluggish ocean circulation. The Tsugaru Current ... : Supplement to: Matsuzaki, Kenji M; Nishi, Hiroshi; Suzuki, Noritoshi; Cortese, Giuseppe; Eynaud, Frédérique; Takashima, Reishi; Kawate, Yumiko; Sakai, Toyusaburo (2014): Paleoceanographic history of the Northwest Pacific Ocean over the past 740kyr, discerned from radiolarian fauna. Palaeogeography, Palaeoclimatology, Palaeoecology, 396, 26-40 ...