Late Glacial – Holocene climate variability and sedimentary environments on northern continental shelves Zonal and meridional Atlantic Water advection

• Main Author: Sørensen, Steffen Aagaard
• Format: Doctoral or Postdoctoral Thesis
• Language: English
• Published: Universitetet i Tromsø 2011
• Subjects: VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466; VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466; Late Glacial-Holocene; northern continental shelves; planktic foraminifera; stable isotopes; Mg/Ca ratios; DOKTOR-004; Arctic; Barents Sea; Norway; Aagaard; Junttila; Foraminifera*; Nordic Seas; Spitsbergen
• Online Access: https://hdl.handle.net/10037/3007

Papers 1, 2 and 5 are not available in Munin due to publishers' restrictions: 1. S. Aagaard-Sørensen, K. Husum, M. Hald, J. Knies: 'Paleoceanographic development in the SW Barents Sea during the Late WeichselianeEarly Holocene transition',Quaternary Science Reviews 29 (2010) 3442-3456. Paper available at http://dx.doi.org/10.1016/j.quascirev.2010.08.014 2. J. Junttila, S. Aagaard-Sørensen, K. Husum and M. Hald: 'Late Glacial–Holocene clay minerals elucidating glacial history in the SW Barents Sea', Marine Geology 276 (2010) 71–85. Paper available at http://dx.doi.org/10.1016/j.margeo.2010.07.009 5. Spielhagen, R. F.,Werner, K., Aagaard-Sørensen, S., Zamelczyk, K., Kandiano,E., Budeus, G., Husum, K., Marchitto, T. and Hald, M.:'Enhanced Modern Heat Transfer to the Arctic by Warm Atlantic Water', SCIENCE(2011), 331, 450-453. Paper available at http://dx.doi.org/10.1126/science.119739 The overall objective for this PhD-study was to further advance the understanding of the oceanographic variability and development in the Nordic Seas during the Late Glacial and the Holocene and towards the present. The focus is specifically on the poleward Atlantic Water advection along the continental margins of Norway, into the SW Barents Sea and along the West Spitsbergen slope. Four high resolution sediment cores retrieved from northern continental shelve allowed examination of spatial and temporal oceanographic and environmental variability and elucidation of underlying forcing mechanisms. The sediment cores were investigated using several paleoceanographic proxies. These include planktic and benthic foraminiferal fauna distributions, measurements of stable isotopes (δ18O, δ13C) on foraminiferal tests and transfer function SST reconstructions based on planktic foraminifer species counts. Grain size analysis, IRD counts, clay mineral analysis and chemical analysis of bulk sediment carbon content were also used. Additionally the relatively new paleothermometer, the Mg/Ca-ratio, was applied on planktic and benthic foraminifera to ...