Hald, Morten; Salomonsen, Gaute R; Husum, Katrine; Wilson, Laurie J (2011): 210Pb and AMS radiocarbon dates of sediment cores JM99-1197 and JM02-59 obtained in Malangen [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.810470, Supplement to: Hald, M et al. (2011): A 2000 year record of Atlantic Water temperature variability from the Malangen Fjord, northeastern North Atlantic. The Holocene, 21(7), 1049-1059, https://doi.org/10.1177/0959683611400457
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Abstract:
A high-resolution sedimentary record from the subarctic Malangen fjord in northern Norway, northeastern North Atlantic has been investigated in order to reconstruct variations in influx of Atlantic Water for the last 2000 years. The fjord provides a regional oceanographic climatic signal reflecting changes in the North Atlantic heat flux at this latitude because of its deep sill and the relatively narrow adjoining continental shelf. The reconstructions are based on oxygen and carbon isotopic studies of benthic foraminifera from a high accumulation basin in the Malangen fjord, providing subdecadal time resolution. A comparison between instrumental measurements of bottom water temperatures at the core location and the reconstructed temperatures from benthic foraminiferal d18O for the same time period demonstrates that the stable isotope values reflect the bottom water temperatures very well. The reconstructed temperature record shows an overall decline in temperature of c. 1°C from c. 40 BC to ad 1350. This cooling trend is assumed to be driven by an orbital forced reduction in insolation. Superimposed on the general cooling trend are several periods of warmer or colder temperatures. The long-term fluctuations in the Malangen fjord are concurrent with fluctuations of Atlantic Water in the northern North Atlantic. Although they are not directly comparable, comparisons of atmospheric temperatures and marine records, indicate a close coupling between the climate systems. After ad l800 the record shows an unprecedented warming within the last 2000 years.
Project(s):
Coverage:
Latitude: 69.494330 * Longitude: 18.382000
Date/Time Start: 1999-11-26T23:07:00 * Date/Time End: 1999-11-26T23:07:00
Comment:
Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
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Datasets listed in this publication series
- Hald, M; Salomonsen, GR; Husum, K et al. (2011): (Table 2) AMS radiocarbon dates of sediment cores JM99-1197/BC and JM02-59/GC obtained during Jan Mayen cruises in Malangen. https://doi.org/10.1594/PANGAEA.810469
- Hald, M; Salomonsen, GR; Husum, K et al. (2011): (Table 1) 210Pb dates from sediment core JM99-1197/BC obtained during Jan Mayen cruise JM99 in Malangen. https://doi.org/10.1594/PANGAEA.810468