Age determination and sea-surface reconstruction of sediment cores from the Norwegian Sea, supplement to: Dolven, J K; Cortese, Giuseppe; Bjorklund, Kjell R (2002): A high-resolution radiolarian-derived paleotemperature record for the Late Pleistocene-Holocene in the Norwegian Sea. Paleoceanography, 17(4), 1072

• Main Authors: Dolven, J K, Cortese, Giuseppe, Bjorklund, Kjell R
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2002
• Subjects: Late Pleistocene-Holocene; Norwegian Sea; Radiolarians; Piston corer; Calypso Corer; HM79; MD101; Håkon Mosby; Marion Dufresne 1995; International Marine Global Change Study IMAGES; Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Quaternary Environment of the Eurasian North QUEEN; Greenland; ice core; Ice Sheet; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.736626; https://doi.pangaea.de/10.1594/PANGAEA.736626

Polycystine radiolarians are used to reconstruct summer sea surface temperatures (SSSTs) for the Late Pleistocene-Holocene (600-13,400 14C years BP) in the Norwegian Sea. At 13,200 14C years BP, the SSST was close to the average Holocene SSST (~12°C). It then gradually dropped to 7.1°C in the Younger Dryas. Near the Younger Dryas-Holocene transition (~10,000 14C years BP), the SSST increased 5°C in about 530 years. Four abrupt cooling events, with temperature drops of up to 2.1°C, are recognized during the Holocene: at 9340, 7100 ("8200 calendar years event"), 6400 and 1650 14C years BP. Radiolarian SSSTs and the isotopic signal from the GISP2 ice core are strongly coupled, stressing the importance of the Norwegian Sea as a mediator of heat/precipitation exchange between the North Atlantic, the atmosphere, and the Greenland ice sheet. Radiolarian and diatom-derived SSSTs display similarities, with the former not showing the recently reported Holocene cooling trend.