A multi-decadal record of oceanographic changes of the past ~165 years (1850-2015 AD) from Northwest of Iceland. ...

• Main Authors: Simon, Margit H, Muschitiello, Francesco, Tisserand, Amandine A, Olsen, Are, Moros, Matthias, Perner, Kerstin, Bårdsnes, Siv Tone, Dokken, Trond M, Jansen, Eystein
• Format: Article in Journal/Newspaper
• Language: English
• Published: Public Library of Science (PLoS) 2020
• Subjects: Ecosystem; Iceland; Isotopes; Oceanography; FOS Earth and related environmental sciences; Temperature; Water; Arctic; Foraminifera*; Neogloboquadrina pachyderma
• Online Access: https://dx.doi.org/10.17863/cam.58661; https://www.repository.cam.ac.uk/handle/1810/311569

Extending oceanographic data beyond the instrumental period is highly needed to better characterize and understand multi-decadal to centennial natural ocean variability. Here, a stable isotope record at unprecedented temporal resolution (1 to 2 years) from a new marine core retrieved off western North Iceland is presented. We aim to better constrain the variability of subsurface, Atlantic-derived Subpolar Mode Water (SPMW), using near surface-dwelling planktic foraminifera and Arctic Intermediate Water (AIW) mass changes using benthic foraminifera over the last ~165 years. The reconstruction overlaps in time with instrumental observations and a direct comparison reveals that the δ18O record of Neogloboquadrina pachyderma is reliably representing temperature fluctuations in the SPMWs. Trends in the N. pachyderma δ13C record match the measured phosphate concentration in the upper 200 m on the North Icelandic Shelf well. Near surface-dwelling foraminifera trace anthropogenic CO2 in the Iceland Sea by ~ 1950 ± ...