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Knudsen, Karen Luise; Eiriksson, Jón; Bartels-Jonsdottir, Helga B (2019): Oceanographic changes through the last millennium off North Iceland: temperature and salinity reconstructions based on foraminifera and stable isotopes [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.900268, Supplement to: Knudsen, KL et al. (2012): Oceanographic changes through the last millennium off North Iceland: Temperature and salinity reconstructions based on foraminifera and stable isotopes. Marine Micropaleontology, 84-85, 54-73, https://doi.org/10.1016/j.marmicro.2011.11.002

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Abstract:
Temperature and salinity reconstructions for two 1000-year high-resolution sedimentary records, located at the boundary between Atlantic and Arctic surface waters on the North Icelandic shelf, are based on transfer functions and oxygen isotopes for planktonic and benthic foraminifera. There is a general increase of Arctic Water indicator species at the transition from the Medieval Warm Period into the Little Ice Age (LIA) and a subsequent return of Atlantic Water indicator species towards the end of the LIA and in the 20th century.
The timing of the reconstructed temperature changes, both at the beginning and at the end of the LIA, appears to be slightly different for the different water masses. The earliest temperature change is seen in the bottom and subsurface waters, where a cooling is reconstructed as early as AD 1150-1200 at both locations, whereas previously published diatom-based and alkenone-based sea-surface temperature reconstructions show a change at AD 1300, coinciding with the air temperature shift in the area. Our results show the need of a thorough understanding of the oceanography in the study area, as well as the different living habitat for the biological proxies used for the temperature estimates.
Keyword(s):
Benthic and planktonic foraminifera; Last millennium; North Icelandic shelf; Stable isotopes
Related to:
Cunningham, Laura Kay; Austin, William EN; Knudsen, Karen Luise; Eiriksson, Jón; Scourse, James D; Wanamaker, Alan D; Butler, Paul G; Cage, Alix G; Richter, Thomas; Husum, Katrine; Hald, Morten; Andersson, Carin; Zorita, Eduardo; Linderholm, Hans W; Gunnarson, Björn E; Sicre, Marie-Alexandrine; Sejrup, Hans Petter; Jiang, Hui; Wilson, Rob J S (2013): Reconstructions of surface ocean conditions from the northeast Atlantic and Nordic seas during the last millennium. The Holocene, 23(7), 921-935, https://doi.org/10.1177/0959683613479677
Coverage:
Median Latitude: 66.636208 * Median Longitude: -18.120000 * South-bound Latitude: 66.551667 * West-bound Longitude: -18.750333 * North-bound Latitude: 66.763170 * East-bound Longitude: -17.699833
Date/Time Start: 1999-08-01T00:00:00 * Date/Time End: 1999-08-01T00:00:00
Comment:
Project affiliation and funding:
European Commission MILLENNIUM Integrated Project (grant 017008).
Unpublished pre - 1000 cal. BP isotope data provided by K. L. Knudsen and J. Eiríksson, funded by the Danish Natural Science Research Council, the Icelandic Research Council, and the European Commission's 5th Framework Programme PACLIVA (EVK2-2002-00143).
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
10 datasets

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Datasets listed in this publication series

  1. Knudsen, KL; Eiriksson, J; Bartels-Jonsdottir, HB (2019): Radiocarbon dates and tephra markers for upper part of of sediment core MD99-2273. https://doi.org/10.1594/PANGAEA.900260
  2. Knudsen, KL; Eiriksson, J; Bartels-Jonsdottir, HB (2019): Stable carbon isotope record of Islandiella norcrossi of sediment composite core MD99-2273_BO5-2006-MC03B. https://doi.org/10.1594/PANGAEA.900257
  3. Knudsen, KL; Eiriksson, J; Bartels-Jonsdottir, HB (2019): Stable oxygen isotope record of Islandiella norcrossi of sediment composite core MD99-2273_BO5-2006-MC03B. https://doi.org/10.1594/PANGAEA.900254
  4. Knudsen, KL; Eiriksson, J; Bartels-Jonsdottir, HB (2019): Stable isotope record of Neogloboquadrina pachyderma sinistral of sediment composite core MD99-2273_BO5-2006-MC03B. https://doi.org/10.1594/PANGAEA.900258
  5. Knudsen, KL; Eiriksson, J; Bartels-Jonsdottir, HB (2019): Stable carbon isotope record of Islandiella norcrossi of sediment composite core MD99-2275_B05-2006-MC04B. https://doi.org/10.1594/PANGAEA.900263
  6. Knudsen, KL; Eiriksson, J; Bartels-Jonsdottir, HB (2019): Stable carbon isotope record of Neogloboquadrina pachyderma sinistral of sediment composite core MD99-2275_B05-2006-MC04B. https://doi.org/10.1594/PANGAEA.900265
  7. Knudsen, KL; Eiriksson, J; Bartels-Jonsdottir, HB (2019): Stable oxygen isotope record of Islandiella norcrossi of sediment composite core MD99-2275_B05-2006-MC04B. https://doi.org/10.1594/PANGAEA.900262
  8. Knudsen, KL; Eiriksson, J; Bartels-Jonsdottir, HB (2019): Stable oxygen isotope record of Neogloboquadrina pachyderma sinistral of sediment composite core MD99-2275_B05-2006-MC04B. https://doi.org/10.1594/PANGAEA.900264
  9. Knudsen, KL; Eiriksson, J; Bartels-Jonsdottir, HB (2019): Abundances of Cassidulina neoteretis in sediment composite core MD99-2275_B05-2006-MC04B. https://doi.org/10.1594/PANGAEA.900266
  10. Knudsen, KL; Eiriksson, J; Bartels-Jonsdottir, HB (2019): Abundances of Neogloboquadrina pachyderma sinistral in sediment composite core MD99-2275_B05-2006-MC04B. https://doi.org/10.1594/PANGAEA.900267