Summer sea surface temperatures calculated from radiolaria at ODP Site 177-1089 in the subantarctic Atlantic ...

• Main Authors: Cortese, Giuseppe, Abelmann, Andrea, Gersonde, Rainer
• Format: Dataset
• Language: English
• Published: PANGAEA 2007
• Subjects: AGE; DEPTH, sediment/rock; Sea surface temperature, summer; Composite Core; Transfer function Imbrie & Kipp, 1971, in Turekian, Yale Univ Press; Leg177; Joides Resolution; International Polar Year 2007-2008 IPY; Ocean Drilling Program ODP; International Polar Year; IPY; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.684659; https://doi.pangaea.de/10.1594/PANGAEA.684659

A submillennial resolution, radiolarian-based record of summer sea surface temperature (SST) documents the last five glacial to interglacial transitions at the subtropical front, southern Atlantic Ocean. Rapid fluctuations occur both during glacial and interglacial intervals, and sudden cooling episodes at glacial terminations are recurrent. Surface hydrography and global ice volume proxies from the same core suggest that summer SST increases prior to terminations lead global ice-volume decreases by 4.7 ± 3.7 ka (in the eccentricity band), 6.9 ± 2.5 ka (obliquity), and 2.7 ± 0.9 ka (precession). A comparison between SST and benthic delta13C suggests a decoupling in the response of northern subantarctic surface, intermediate, and deep water masses to cold events in the North Atlantic. The matching features between our SST record and the one from core MD97-2120 (southwest Pacific) suggests that the super-regional expression of climatic events is substantially affected by a single climatic agent: the ... : Core PS2821-1 and the composite section of ODP Site 177-1089 were correlated by color reflectance, magnetic susceptibility and Cycladophora davisiana relative abundance changes records ...